* Assertion: should not be reached at sgen-scan-object.h:91

## Steps to Reproduce

Submit a PR.

### Current Behavior

Failure.

### Expected Behavior

Successs.

## On which platforms did you notice this

 Linux

## Stacktrace

https://jenkins.mono-project.com/job/test-mono-pull-request-interpreter/17800/parsed_console/log.html

lots of threads here

https://jenkins.mono-project.com/job/test-mono-pull-request-interpreter/17800/parsed_console/log_content.html

```

***** MonoTests.System.Threading.ThreadTest.TestUndivisibleByPageSizeMaxStackSize
***** MonoTests.System.Threading.ThreadTest.Test_Interrupt
***** MonoTests.System.Threading.ThreadTest.Test_InterruptCurrentThread
***** MonoTests.System.Threading.ThreadTest_ManagedThreadId
***** MonoTests.System.Threading.ThreadTest_ManagedThreadId.ManagedThreadId_AppDomains
* Assertion: should not be reached at sgen-scan-object.h:91


=================================================================
	Native Crash Reporting
=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================
/proc/self/maps:
40058000-40068000 rwxp 00000000 00:00 0 
400c4000-400d4000 rwxp 00000000 00:00 0 
4020a000-4021a000 rwxp 00000000 00:00 0 
40871000-40881000 rwxp 00000000 00:00 0 
40e06000-40e16000 rwxp 00000000 00:00 0 
40e17000-40e27000 rwxp 00000000 00:00 0 
414f8000-41508000 rwxp 00000000 00:00 0 
417e1000-417f1000 rwxp 00000000 00:00 0 
41a23000-41a33000 rwxp 00000000 00:00 0 
41b06000-41b16000 rwxp 00000000 00:00 0 
41d5f000-41d6f000 rwxp 00000000 00:00 0 
41f09000-41f19000 rwxp 00000000 00:00 0 
55a0a5ff2000-55a0a646a000 r-xp 00000000 08:11 59650342                   /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono-sgen
55a0a666a000-55a0a6671000 r--p 00478000 08:11 59650342                   /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono-sgen
55a0a6671000-55a0a6678000 rw-p 0047f000 08:11 59650342                   /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono-sgen
55a0a6678000-55a0a6693000 rw-p 00000000 00:00 0 
55a0a7423000-55a0af3ff000 rw-p 00000000 00:00 0                          [heap]
7f5808000000-7f5808021000 rw-p 00000000 00:00 0 
7f5808021000-7f580c000000 ---p 00000000 00:00 0 
7f5810000000-7f5810021000 rw-p 00000000 00:00 0 
7f5810021000-7f5814000000 ---p 00000000 00:00 0 
7f5814000000-7f5814021000 rw-p 00000000 00:00 0 
7f5814021000-7f5818000000 ---p 00000000 00:00 0 
7f5818000000-7f5818021000 rw-p 00000000 00:00 0 
7f5818021000-7f581c000000 ---p 00000000 00:00 0 

=================================================================
	Native stacktrace:
=================================================================
	0x55a0a60be994 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a60bed01 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a606b9f9 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a60be03f - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x7f59210330e0 - /lib/x86_64-linux-gnu/libpthread.so.0 : (null)
	0x7f5920a9efff - /lib/x86_64-linux-gnu/libc.so.6 : gsignal
	0x7f5920aa042a - /lib/x86_64-linux-gnu/libc.so.6 : abort
	0x55a0a631a667 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a6300ce9 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a631a58e - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a631aa60 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : monoeg_assertion_message
	0x55a0a62dd1b4 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a62c85f6 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a62ca64a - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a62caa0e - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a62cdeb1 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a62ce449 - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a62a841e - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : mono_gc_collect
	0x55a0a6190cce - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x55a0a624fdae - /mnt/jenkins/workspace/test-mono-pull-request-interpreter/mono/mini/mono : (null)
	0x7f59210294a4 - /lib/x86_64-linux-gnu/libpthread.so.0 : (null)
	0x7f5920b54d0f - /lib/x86_64-linux-gnu/libc.so.6 : clone

=================================================================
	Telemetry Dumper:
=================================================================
Pkilling 0x7f58ac37a700 from 0x7f58237fb700
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Pkilling 0x7f590fbfd700 from 0x7f58237fb700
Pkilling 0x7f58239fc700 from 0x7f58237fb700
Entering thread summarizer pause from 0x7f58237fb700
Finished thread summarizer pause from 0x7f58237fb700.

Waiting for dumping threads to resume

=================================================================
	External Debugger Dump:
=================================================================
[New LWP 62123]
[New LWP 62124]
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  Id   Target Id         Frame 
* 1    Thread 0x7f5921b65740 (LWP 62077) "mono" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  2    Thread 0x7f59203ff700 (LWP 62123) "SGen worker" 0x00007f592102f17f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
  3    Thread 0x7f591e798700 (LWP 62124) "Finalizer" 0x00007f5921031f7c in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
  4    Thread 0x7f591c8bb700 (LWP 62259) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  5    Thread 0x7f591c52f700 (LWP 62389) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  6    Thread 0x7f590f9fc700 (LWP 62635) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  7    Thread 0x7f590f7fb700 (LWP 62638) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  8    Thread 0x7f590f3f9700 (LWP 63231) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  9    Thread 0x7f590e5d1700 (LWP 87878) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  10   Thread 0x7f590da0d700 (LWP 87879) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  11   Thread 0x7f590dc0e700 (LWP 87880) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  12   Thread 0x7f590d80c700 (LWP 87881) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  13   Thread 0x7f590f5fa700 (LWP 87882) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  14   Thread 0x7f590ffff700 (LWP 87883) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  15   Thread 0x7f590de0f700 (LWP 87885) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  16   Thread 0x7f590d60b700 (LWP 87887) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  17   Thread 0x7f58cecfe700 (LWP 99449) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  18   Thread 0x7f58ceeff700 (LWP 99452) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  19   Thread 0x7f58cfaff700 (LWP 99455) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  20   Thread 0x7f590c4ff700 (LWP 99456) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  21   Thread 0x7f58cdcff700 (LWP 99460) "Timer-Scheduler" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  22   Thread 0x7f58cd8ff700 (LWP 27859) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  23   Thread 0x7f590fbfd700 (LWP 27861) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  24   Thread 0x7f58cd6fe700 (LWP 27862) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  25   Thread 0x7f58cd4fd700 (LWP 27863) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  26   Thread 0x7f58cd2fc700 (LWP 27864) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  27   Thread 0x7f58cd0fb700 (LWP 27865) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  28   Thread 0x7f58affff700 (LWP 27870) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  29   Thread 0x7f58afdfe700 (LWP 27874) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  30   Thread 0x7f58afbfd700 (LWP 27876) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  31   Thread 0x7f58af9fc700 (LWP 27877) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  32   Thread 0x7f58af5fa700 (LWP 28173) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  33   Thread 0x7f58ae78c700 (LWP 28350) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  34   Thread 0x7f58ae58b700 (LWP 28351) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  35   Thread 0x7f58ae38a700 (LWP 28352) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  36   Thread 0x7f58ae189700 (LWP 28354) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  37   Thread 0x7f58add87700 (LWP 31477) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  38   Thread 0x7f58adb86700 (LWP 31485) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  39   Thread 0x7f58adf88700 (LWP 31489) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  40   Thread 0x7f58ad985700 (LWP 31572) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  41   Thread 0x7f58ad784700 (LWP 31573) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  42   Thread 0x7f58af3f9700 (LWP 34678) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  43   Thread 0x7f58af7fb700 (LWP 34679) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  44   Thread 0x7f58ad181700 (LWP 34680) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  45   Thread 0x7f590d40a700 (LWP 34681) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  46   Thread 0x7f58acf80700 (LWP 34682) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  47   Thread 0x7f590e7d2700 (LWP 34683) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  48   Thread 0x7f58ad382700 (LWP 34686) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  49   Thread 0x7f58ad583700 (LWP 34687) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  50   Thread 0x7f58acd7f700 (LWP 34690) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  51   Thread 0x7f58acb7e700 (LWP 34701) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  52   Thread 0x7f58ac97d700 (LWP 35559) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  53   Thread 0x7f58ac77c700 (LWP 35562) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  54   Thread 0x7f58ac57b700 (LWP 35583) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  55   Thread 0x7f590fdfe700 (LWP 41144) "mono" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  56   Thread 0x7f583f1ff700 (LWP 41201) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  57   Thread 0x7f58ac37a700 (LWP 41202) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  58   Thread 0x7f583ffff700 (LWP 41203) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  59   Thread 0x7f583fdfe700 (LWP 41204) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  60   Thread 0x7f583f6d7700 (LWP 41249) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  61   Thread 0x7f583f4d6700 (LWP 41250) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  62   Thread 0x7f5823fff700 (LWP 42884) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  63   Thread 0x7f5823dfe700 (LWP 42963) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  64   Thread 0x7f5823bfd700 (LWP 42967) "Thread Pool Wor" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  65   Thread 0x7f58239fc700 (LWP 42968) "ThreadName1" 0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
  66   Thread 0x7f58237fb700 (LWP 44092) "Domain unloader" 0x00007f5921032b5a in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0

Thread 66 (Thread 0x7f58237fb700 (LWP 44092)):
#0  0x00007f5921032b5a in waitpid () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x000055a0a60bebb3 in dump_native_stacktrace (mctx=mctx@entry=0x7f58237f9e80, signal=0x55a0a63381b8 "SIGABRT") at mini-posix.c:1110
#2  0x000055a0a60bed01 in mono_dump_native_crash_info (signal=signal@entry=0x55a0a63381b8 "SIGABRT", mctx=mctx@entry=0x7f58237f9e80, info=info@entry=0x7f58237fa170) at mini-posix.c:1158
#3  0x000055a0a606b9f9 in mono_handle_native_crash (signal=signal@entry=0x55a0a63381b8 "SIGABRT", mctx=mctx@entry=0x7f58237f9e80, info=info@entry=0x7f58237fa170) at mini-exceptions.c:3324
#4  0x000055a0a60be03f in sigabrt_signal_handler (_dummy=6, _info=0x7f58237fa170, context=0x7f58237fa040) at mini-posix.c:234
#5  &lt;signal handler called&gt;
#6  0x00007f5920a9efff in raise () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x00007f5920aa042a in abort () from /lib/x86_64-linux-gnu/libc.so.6
#8  0x000055a0a631a667 in monoeg_assert_abort () at goutput.c:57
#9  0x000055a0a6300ce9 in mono_log_write_logfile (log_domain=&lt;optimized out&gt;, level=&lt;optimized out&gt;, hdr=&lt;optimized out&gt;, message=0x7f5888001030 "* Assertion: should not be reached at sgen-scan-object.h:91\n") at mono-log-common.c:136
#10 0x000055a0a631a58e in monoeg_g_logstr (msg=&lt;optimized out&gt;, log_level=G_LOG_LEVEL_ERROR, log_domain=0x0) at goutput.c:134
#11 monoeg_g_logv_nofree (log_domain=log_domain@entry=0x0, log_level=log_level@entry=G_LOG_LEVEL_ERROR, format=format@entry=0x55a0a6326d88 "* Assertion: should not be reached at %s:%d\n", args=args@entry=0x7f58237fa8a8) at goutput.c:149
#12 0x000055a0a631aa60 in monoeg_g_logv_nofree (args=0x7f58237fa8a8, format=0x55a0a6326d88 "* Assertion: should not be reached at %s:%d\n", log_level=G_LOG_LEVEL_ERROR, log_domain=0x0) at goutput.c:142
#13 monoeg_assertion_message (format=format@entry=0x55a0a6326d88 "* Assertion: should not be reached at %s:%d\n") at goutput.c:184
#14 0x000055a0a62dd1b4 in major_scan_object_no_evacuation (queue=0x7f58237fab90, desc=0, full_object=0x7f591c91a2e8) at sgen-scan-object.h:91
#15 drain_gray_stack_no_evacuation (queue=&lt;optimized out&gt;) at sgen-marksweep-drain-gray-stack.h:347
#16 drain_gray_stack (queue=&lt;optimized out&gt;) at sgen-marksweep.c:1330
#17 0x000055a0a62c85f6 in sgen_drain_gray_stack (ctx=...) at sgen-gc.c:537
#18 finish_gray_stack (generation=generation@entry=1, ctx=...) at sgen-gc.c:1099
#19 0x000055a0a62ca64a in major_finish_collection (gc_thread_gray_queue=gc_thread_gray_queue@entry=0x7f58237fab90, reason=reason@entry=0x55a0a63e3c36 "user request", is_overflow=is_overflow@entry=0, old_next_pin_slot=3888, forced=forced@entry=1) at sgen-gc.c:2219
#20 0x000055a0a62caa0e in major_do_collection (reason=0x55a0a63e3c36 "user request", is_overflow=0, forced=1) at sgen-gc.c:2359
#21 0x000055a0a62cdeb1 in sgen_perform_collection_inner (requested_size=requested_size@entry=0, generation_to_collect=generation_to_collect@entry=1, reason=0x55a0a63e3c36 "user request", forced_serial=1, stw=1) at sgen-gc.c:2559
#22 0x000055a0a62ce449 in sgen_perform_collection (stw=1, forced_serial=1, reason=0x55a0a63e3c36 "user request", generation_to_collect=1, requested_size=0) at sgen-gc.c:2636
#23 sgen_gc_collect (generation=generation@entry=1) at sgen-gc.c:3090
#24 0x000055a0a62a841e in mono_gc_collect (generation=1) at sgen-mono.c:2435
#25 0x000055a0a6190cce in unload_thread_main (arg=arg@entry=0x55a0af3bc730) at appdomain.c:2980
#26 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#27 start_wrapper (data=0x55a0af3c95d0) at threads.c:1294
#28 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#29 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 65 (Thread 0x7f58239fc700 (LWP 42968)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58239fb740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58fc1de1f0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 64 (Thread 0x7f5823bfd700 (LWP 42967)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f5823bfc740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0af00f0b0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 63 (Thread 0x7f5823dfe700 (LWP 42963)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f5823dfd740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5860015270) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 62 (Thread 0x7f5823fff700 (LWP 42884)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f5823ffe740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0af00f0b0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 61 (Thread 0x7f583f4d6700 (LWP 41250)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f583f4d5740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aeda2650) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 60 (Thread 0x7f583f6d7700 (LWP 41249)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f583f6d6740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f582c003340) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 59 (Thread 0x7f583fdfe700 (LWP 41204)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f583fdfd740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58e8008700) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 58 (Thread 0x7f583ffff700 (LWP 41203)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f583fffe740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aeda2650) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 57 (Thread 0x7f58ac37a700 (LWP 41202)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ac379740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aeda2650) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 56 (Thread 0x7f583f1ff700 (LWP 41201)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f583f1fe740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58e4008900) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 55 (Thread 0x7f590fdfe700 (LWP 41144)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590fdfd700) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a668d240 &lt;sleep_cond&gt;, mutex=mutex@entry=0x55a0a668d280 &lt;sleep_mutex&gt;, timeout_ms=timeout_ms@entry=500) at mono-os-mutex.c:75
#5  0x000055a0a6310322 in mono_coop_cond_timedwait (cond=0x55a0a668d240 &lt;sleep_cond&gt;, mutex=0x55a0a668d280 &lt;sleep_mutex&gt;, timeout_ms=500) at ../../mono/utils/mono-coop-mutex.h:100
#6  sleep_interruptable (alerted=0x7f590fdfddfc, ms=500) at mono-threads.c:1619
#7  mono_thread_info_sleep (ms=ms@entry=500, alerted=alerted@entry=0x7f590fdfddfc) at mono-threads.c:1651
#8  0x000055a0a62afe62 in monitor_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:708
#9  0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#10 start_wrapper (data=0x55a0aed4fc20) at threads.c:1294
#11 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#12 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 54 (Thread 0x7f58ac57b700 (LWP 35583)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ac57a740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58e4008900) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 53 (Thread 0x7f58ac77c700 (LWP 35562)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ac77b740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f589c003860) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 52 (Thread 0x7f58ac97d700 (LWP 35559)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ac97c740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58d01c7d10) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 51 (Thread 0x7f58acb7e700 (LWP 34701)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58acb7d740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58a000eba0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 50 (Thread 0x7f58acd7f700 (LWP 34690)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58acd7e740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58d8004980) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 49 (Thread 0x7f58ad583700 (LWP 34687)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ad582740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f589c003860) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 48 (Thread 0x7f58ad382700 (LWP 34686)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ad381740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5864012d10) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 47 (Thread 0x7f590e7d2700 (LWP 34683)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590e7d1740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5854003570) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 46 (Thread 0x7f58acf80700 (LWP 34682)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58acf7f740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5874005730) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 45 (Thread 0x7f590d40a700 (LWP 34681)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590d409740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58ec0038f0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 44 (Thread 0x7f58ad181700 (LWP 34680)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ad180740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5868005840) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 43 (Thread 0x7f58af7fb700 (LWP 34679)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58af7fa740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58d8004980) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 42 (Thread 0x7f58af3f9700 (LWP 34678)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58af3f8740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58e4008900) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 41 (Thread 0x7f58ad784700 (LWP 31573)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ad783740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58ec03e700) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 40 (Thread 0x7f58ad985700 (LWP 31572)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ad984740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed8fb20) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 39 (Thread 0x7f58adf88700 (LWP 31489)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58adf87740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5888003340) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 38 (Thread 0x7f58adb86700 (LWP 31485)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58adb85740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed8fb20) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 37 (Thread 0x7f58add87700 (LWP 31477)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58add86740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58a4003340) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 36 (Thread 0x7f58ae189700 (LWP 28354)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ae188740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58f81e43a0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 35 (Thread 0x7f58ae38a700 (LWP 28352)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ae389740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f589c003340) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 34 (Thread 0x7f58ae58b700 (LWP 28351)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ae58a740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed4e260) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 33 (Thread 0x7f58ae78c700 (LWP 28350)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ae78b740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed4e260) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 32 (Thread 0x7f58af5fa700 (LWP 28173)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58af5f9740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5890003340) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 31 (Thread 0x7f58af9fc700 (LWP 27877)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58af9fb740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58d8004980) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 30 (Thread 0x7f58afbfd700 (LWP 27876)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58afbfc740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed4e260) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 29 (Thread 0x7f58afdfe700 (LWP 27874)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58afdfd740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58f81e43a0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 28 (Thread 0x7f58affff700 (LWP 27870)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58afffe740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58e4007d80) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 27 (Thread 0x7f58cd0fb700 (LWP 27865)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cd0fa740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed4e260) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 26 (Thread 0x7f58cd2fc700 (LWP 27864)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cd2fb740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58b0003190) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 25 (Thread 0x7f58cd4fd700 (LWP 27863)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cd4fc740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58fc1de1f0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 24 (Thread 0x7f58cd6fe700 (LWP 27862)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cd6fd740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed4e260) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 23 (Thread 0x7f590fbfd700 (LWP 27861)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590fbfc740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58dc0053c0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 22 (Thread 0x7f58cd8ff700 (LWP 27859)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cd8fe740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0aed4e260) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 21 (Thread 0x7f58cdcff700 (LWP 99460)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cdcfb540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7426170, mutex=mutex@entry=0x55a0a7426148, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a7426148, cond=0x55a0a7426170) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f58cdcfbba0, poll=0, timeout=9999, mutex=0x55a0a7426148, cond=0x55a0a7426170) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a7426138, timeout=9999, alerted=alerted@entry=0x7f58cdcfbba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f58cdcfc7b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f58cdcfc4c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f58cdcfc7b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f58cdcfc4c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f58cdcfc7b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f58cdcfc4c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f58cdcfc498, sp@entry=0x7f58cdcfc4b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f58cdcfc8e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f58cdcfc8e0, sig=0x55a0a7cb2730, op=552, sp=0x7f58cdcfc4b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f58cdcfc8e0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfcb30, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfcd70, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfcfb0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfd1f0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfd440, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfd6a0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cdcfd8e0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cdcfdb40, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cdcfdde0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cdcfe020, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfe280, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfe4c0, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cdcfe720, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cdcfe970, context=0x7f58bc000ff0, clause_args=0x1f1) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cdcfeb00, context=0x7f58bc000ff0, clause_args=0x1f1, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f592061b658, params=0x7f58cdcfee68, exc=0x0, error=0x7f58cdcfee70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f58cdcfee68, exc=0x0, error=0x7f58cdcfee70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f58cdcfee70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f592061b658, params=params@entry=0x7f58cdcfee68, exc=exc@entry=0x0, error=error@entry=0x7f58cdcfee70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f592061b658, params=params@entry=0x7f58cdcfee68, error=error@entry=0x7f58cdcfee70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x7f58fc1e05a0) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 20 (Thread 0x7f590c4ff700 (LWP 99456)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590c4fb540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7426100, mutex=mutex@entry=0x55a0a74260d8, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a74260d8, cond=0x55a0a7426100) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f590c4fbba0, poll=0, timeout=9999, mutex=0x55a0a74260d8, cond=0x55a0a7426100) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a74260c8, timeout=9999, alerted=alerted@entry=0x7f590c4fbba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f590c4fc7b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f590c4fc4c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f590c4fc7b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f590c4fc4c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f590c4fc7b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f590c4fc4c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f590c4fc498, sp@entry=0x7f590c4fc4b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f590c4fc8e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f590c4fc8e0, sig=0x55a0a7cb2730, op=552, sp=0x7f590c4fc4b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f590c4fc8e0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fcb30, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fcd70, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fcfb0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fd1f0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fd440, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fd6a0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590c4fd8e0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590c4fdb40, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590c4fdde0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590c4fe020, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fe280, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fe4c0, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590c4fe720, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590c4fe970, context=0x7f58c8006a90, clause_args=0x20d) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590c4feb00, context=0x7f58c8006a90, clause_args=0x20d, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f59205efbd8, params=0x7f590c4fee68, exc=0x0, error=0x7f590c4fee70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f590c4fee68, exc=0x0, error=0x7f590c4fee70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f590c4fee70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f59205efbd8, params=params@entry=0x7f590c4fee68, exc=exc@entry=0x0, error=error@entry=0x7f590c4fee70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f59205efbd8, params=params@entry=0x7f590c4fee68, error=error@entry=0x7f590c4fee70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x7f58d01bfd10) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 19 (Thread 0x7f58cfaff700 (LWP 99455)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cfafb540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7426090, mutex=mutex@entry=0x55a0a7426068, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a7426068, cond=0x55a0a7426090) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f58cfafbba0, poll=0, timeout=9999, mutex=0x55a0a7426068, cond=0x55a0a7426090) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a7426058, timeout=9999, alerted=alerted@entry=0x7f58cfafbba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f58cfafc7b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f58cfafc4c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f58cfafc7b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f58cfafc4c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f58cfafc7b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f58cfafc4c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f58cfafc498, sp@entry=0x7f58cfafc4b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f58cfafc8e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f58cfafc8e0, sig=0x55a0a7cb2730, op=552, sp=0x7f58cfafc4b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f58cfafc8e0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafcb30, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafcd70, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafcfb0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafd1f0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafd440, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafd6a0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cfafd8e0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cfafdb40, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cfafdde0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cfafe020, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafe280, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafe4c0, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cfafe720, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cfafe970, context=0x7f58c0006230, clause_args=0x201) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cfafeb00, context=0x7f58c0006230, clause_args=0x201, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f59205d5730, params=0x7f58cfafee68, exc=0x0, error=0x7f58cfafee70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f58cfafee68, exc=0x0, error=0x7f58cfafee70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f58cfafee70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f59205d5730, params=params@entry=0x7f58cfafee68, exc=exc@entry=0x0, error=error@entry=0x7f58cfafee70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f59205d5730, params=params@entry=0x7f58cfafee68, error=error@entry=0x7f58cfafee70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x7f59041c3430) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 18 (Thread 0x7f58ceeff700 (LWP 99452)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58ceefb540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7426020, mutex=mutex@entry=0x55a0a7425ff8, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a7425ff8, cond=0x55a0a7426020) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f58ceefbba0, poll=0, timeout=9999, mutex=0x55a0a7425ff8, cond=0x55a0a7426020) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a7425fe8, timeout=9999, alerted=alerted@entry=0x7f58ceefbba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f58ceefc7b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f58ceefc4c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f58ceefc7b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f58ceefc4c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f58ceefc7b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f58ceefc4c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f58ceefc498, sp@entry=0x7f58ceefc4b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f58ceefc8e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f58ceefc8e0, sig=0x55a0a7cb2730, op=552, sp=0x7f58ceefc4b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f58ceefc8e0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefcb30, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefcd70, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefcfb0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefd1f0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefd440, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefd6a0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58ceefd8e0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58ceefdb40, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58ceefdde0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58ceefe020, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefe280, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefe4c0, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58ceefe720, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58ceefe970, context=0x7f58c4009820, clause_args=0x215) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58ceefeb00, context=0x7f58c4009820, clause_args=0x215, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f5920582c00, params=0x7f58ceefee68, exc=0x0, error=0x7f58ceefee70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f58ceefee68, exc=0x0, error=0x7f58ceefee70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f58ceefee70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f5920582c00, params=params@entry=0x7f58ceefee68, exc=exc@entry=0x0, error=error@entry=0x7f58ceefee70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f5920582c00, params=params@entry=0x7f58ceefee68, error=error@entry=0x7f58ceefee70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x7f58f81bc460) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 17 (Thread 0x7f58cecfe700 (LWP 99449)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f58cecfa540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7425fb0, mutex=mutex@entry=0x55a0a7425f88, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a7425f88, cond=0x55a0a7425fb0) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f58cecfaba0, poll=0, timeout=9999, mutex=0x55a0a7425f88, cond=0x55a0a7425fb0) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a7425f78, timeout=9999, alerted=alerted@entry=0x7f58cecfaba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f58cecfb7b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f58cecfb4c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f58cecfb7b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f58cecfb4c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f58cecfb7b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f58cecfb4c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f58cecfb498, sp@entry=0x7f58cecfb4b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f58cecfb8e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f58cecfb8e0, sig=0x55a0a7cb2730, op=552, sp=0x7f58cecfb4b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f58cecfb8e0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfbb30, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfbd70, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfbfb0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfc1f0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfc440, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfc6a0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cecfc8e0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cecfcb40, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cecfcde0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cecfd020, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfd280, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfd4c0, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f58cecfd720, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cecfd970, context=0x7f58b8005c00, clause_args=0x1e9) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f58cecfdb00, context=0x7f58b8005c00, clause_args=0x1e9, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f592057bc00, params=0x7f58cecfde68, exc=0x0, error=0x7f58cecfde70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f58cecfde68, exc=0x0, error=0x7f58cecfde70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f58cecfde70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f592057bc00, params=params@entry=0x7f58cecfde68, exc=exc@entry=0x0, error=error@entry=0x7f58cecfde70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f592057bc00, params=params@entry=0x7f58cecfde68, error=error@entry=0x7f58cecfde70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x7f58e01ca5d0) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 16 (Thread 0x7f590d60b700 (LWP 87887)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590d60a740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58d0002330) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 15 (Thread 0x7f590de0f700 (LWP 87885)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590de0e740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0a9ed82c0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 14 (Thread 0x7f590ffff700 (LWP 87883)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590fffe740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0a9ed82c0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 13 (Thread 0x7f590f5fa700 (LWP 87882)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590f5f9740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0a9ed37b0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 12 (Thread 0x7f590d80c700 (LWP 87881)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590d80b740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f5908005520) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 11 (Thread 0x7f590dc0e700 (LWP 87880)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590dc0d740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f58e8008700) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 10 (Thread 0x7f590da0d700 (LWP 87879)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590da0c740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f590800b080) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 9 (Thread 0x7f590e5d1700 (LWP 87878)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590e5d0740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x55a0a9ed37b0) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 8 (Thread 0x7f590f3f9700 (LWP 63231)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590f3f5540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7423af0, mutex=mutex@entry=0x55a0a7423ac8, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a7423ac8, cond=0x55a0a7423af0) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f590f3f5ba0, poll=0, timeout=9999, mutex=0x55a0a7423ac8, cond=0x55a0a7423af0) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a7423ab8, timeout=9999, alerted=alerted@entry=0x7f590f3f5ba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f590f3f67b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f590f3f64c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f590f3f67b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f590f3f64c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f590f3f67b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f590f3f64c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f590f3f6498, sp@entry=0x7f590f3f64b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f590f3f68e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f590f3f68e0, sig=0x55a0a7cb2730, op=552, sp=0x7f590f3f64b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f590f3f68e0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f6b30, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f6d70, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f6fb0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f71f0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f7440, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f76a0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590f3f78e0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590f3f7b40, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590f3f7de0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590f3f8020, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f8280, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f84c0, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f590f3f8720, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590f3f8970, context=0x7f58f000f6a0, clause_args=0x2e1) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f590f3f8b00, context=0x7f58f000f6a0, clause_args=0x2e1, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f59204c33a0, params=0x7f590f3f8e68, exc=0x0, error=0x7f590f3f8e70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f590f3f8e68, exc=0x0, error=0x7f590f3f8e70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f590f3f8e70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f59204c33a0, params=params@entry=0x7f590f3f8e68, exc=exc@entry=0x0, error=error@entry=0x7f590f3f8e70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f59204c33a0, params=params@entry=0x7f590f3f8e68, error=error@entry=0x7f590f3f8e70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x55a0a91bc740) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 7 (Thread 0x7f590f7fb700 (LWP 62638)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590f7fa740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f591001db80) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 6 (Thread 0x7f590f9fc700 (LWP 62635)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f590f9fb740) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f5921031720 in do_futex_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f59210317ef in __new_sem_wait_slow () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f59210318a2 in sem_timedwait () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x000055a0a62af3ca in mono_os_sem_timedwait (flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;, sem=0x55a0a667e308 &lt;worker+72&gt;) at ../../mono/utils/mono-os-semaphore.h:252
#7  mono_coop_sem_timedwait (sem=0x55a0a667e308 &lt;worker+72&gt;, flags=MONO_SEM_FLAGS_ALERTABLE, timeout_ms=&lt;optimized out&gt;) at ../../mono/utils/mono-coop-semaphore.h:55
#8  worker_park () at threadpool-worker-default.c:391
#9  worker_thread (unused=unused@entry=0x0) at threadpool-worker-default.c:490
#10 0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#11 start_wrapper (data=0x7f590800b080) at threads.c:1294
#12 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#13 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 5 (Thread 0x7f591c52f700 (LWP 62389)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f591c52b540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a7423620, mutex=mutex@entry=0x55a0a74235f8, timeout_ms=timeout_ms@entry=9999) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=9999, mutex=0x55a0a74235f8, cond=0x55a0a7423620) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f591c52bba0, poll=0, timeout=9999, mutex=0x55a0a74235f8, cond=0x55a0a7423620) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a74235e8, timeout=9999, alerted=alerted@entry=0x7f591c52bba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=9999, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f591c52c7b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=9999, alertable=alertable@entry=1, error=error@entry=0x7f591c52c4c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f591c52c7b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=9999, error=error@entry=0x7f591c52c4c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f591c52c7b0, a1=1, a2=&lt;optimized out&gt;, a3=9999, error=0x7f591c52c4c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f591c52c498, sp@entry=0x7f591c52c4b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f591c52c8e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f591c52c8e0, sig=0x55a0a7cb2730, op=552, sp=0x7f591c52c4b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f591c52c8e0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52cb30, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52cd70, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52cfb0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52d1f0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52d440, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52d6a0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c52d8e0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c52db40, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c52dde0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c52e020, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52e280, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52e4c0, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c52e720, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c52e970, context=0x7f5914000ff0, clause_args=0x2f5) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c52eb00, context=0x7f5914000ff0, clause_args=0x2f5, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f59206dc038, params=0x7f591c52ee68, exc=0x0, error=0x7f591c52ee70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f591c52ee68, exc=0x0, error=0x7f591c52ee70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f591c52ee70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f59206dc038, params=params@entry=0x7f591c52ee68, exc=exc@entry=0x0, error=error@entry=0x7f591c52ee70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f59206dc038, params=params@entry=0x7f591c52ee68, error=error@entry=0x7f591c52ee70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x55a0a8132ea0) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 4 (Thread 0x7f591c8bb700 (LWP 62259)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7f591c8b7540) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f528 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a6305dfb in mono_os_cond_timedwait (cond=cond@entry=0x55a0a74235b0, mutex=mutex@entry=0x55a0a7423588, timeout_ms=timeout_ms@entry=8262) at mono-os-mutex.c:75
#5  0x000055a0a6267a25 in mono_coop_cond_timedwait (timeout_ms=8262, mutex=0x55a0a7423588, cond=0x55a0a74235b0) at ../../mono/utils/mono-coop-mutex.h:100
#6  mono_w32handle_timedwait_signal_naked (alerted=0x7f591c8b7ba0, poll=0, timeout=8262, mutex=0x55a0a7423588, cond=0x55a0a74235b0) at w32handle.c:652
#7  mono_w32handle_timedwait_signal_handle (handle_data=0x55a0a7423578, timeout=8262, alerted=alerted@entry=0x7f591c8b7ba0, poll=0) at w32handle.c:767
#8  0x000055a0a6268fd7 in mono_w32handle_wait_one (handle=&lt;optimized out&gt;, timeout=timeout@entry=8262, alertable=alertable@entry=1) at w32handle.c:892
#9  0x000055a0a6269625 in mono_w32handle_wait_multiple (handles=handles@entry=0x7f591c8b87b0, nhandles=nhandles@entry=1, waitall=waitall@entry=0, timeout=timeout@entry=8262, alertable=alertable@entry=1, error=error@entry=0x7f591c8b84c8) at w32handle.c:1002
#10 0x000055a0a624ca4b in ves_icall_System_Threading_WaitHandle_Wait_internal (handles=handles@entry=0x7f591c8b87b0, numhandles=numhandles@entry=1, waitall=waitall@entry=0 '\000', timeout=timeout@entry=8262, error=error@entry=0x7f591c8b84c8) at threads.c:2239
#11 0x000055a0a61e6ba7 in ves_icall_System_Threading_WaitHandle_Wait_internal_raw (a0=0x7f591c8b87b0, a1=1, a2=&lt;optimized out&gt;, a3=8262, error=0x7f591c8b84c8) at ../../mono/metadata/icall-def.h:1138
#12 0x000055a0a6150d1a in do_icall (sig=sig@entry=0x55a0a7cb2730, op=op@entry=552, sp=0x7f591c8b8498, sp@entry=0x7f591c8b84b8, ptr=ptr@entry=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;, frame=0x7f591c8b88e0) at interp/interp.c:1948
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7f591c8b88e0, sig=0x55a0a7cb2730, op=552, sp=0x7f591c8b84b8, ptr=0x55a0a61e6b50 &lt;ves_icall_System_Threading_WaitHandle_Wait_internal_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7f591c8b88e0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8b8b30, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8b8d70, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8b8fb0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#18 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8b91f0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#19 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8b9440, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#20 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8b96a0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#21 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c8b98e0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3129
#22 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c8b9b40, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3129
#23 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c8b9de0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3129
#24 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c8ba020, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3129
#25 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8ba280, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#26 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8ba4c0, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7f591c8ba720, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3316
#28 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c8ba970, context=0x7f5910000ff0, clause_args=0x7019) at interp/interp.c:3129
#29 0x000055a0a613d468 in interp_exec_method_full (frame=0x7f591c8bab00, context=0x7f5910000ff0, clause_args=0x7019, clause_args@entry=0x0) at interp/interp.c:3129
#30 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f59206bb590, params=0x7f591c8bae68, exc=0x0, error=0x7f591c8bae70) at interp/interp.c:1724
#31 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=0x7f591c8bae68, exc=0x0, error=0x7f591c8bae70) at mini-runtime.c:2985
#32 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7c8c790, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7f591c8bae70) at object.c:3016
#33 0x000055a0a62280c9 in mono_runtime_delegate_try_invoke (delegate=delegate@entry=0x7f59206bb590, params=params@entry=0x7f591c8bae68, exc=exc@entry=0x0, error=error@entry=0x7f591c8bae70) at object.c:4385
#34 0x000055a0a62281d0 in mono_runtime_delegate_invoke_checked (delegate=delegate@entry=0x7f59206bb590, params=params@entry=0x7f591c8bae68, error=error@entry=0x7f591c8bae70) at object.c:4416
#35 0x000055a0a624fe53 in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1241
#36 start_wrapper (data=0x55a0a7c868e0) at threads.c:1294
#37 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#38 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 3 (Thread 0x7f591e798700 (LWP 62124)):
#0  0x00007f5921031f7c in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f592102bbb5 in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x000055a0a62cdab2 in mono_os_mutex_lock (mutex=0x55a0a66925a0 &lt;sgen_gc_mutex&gt;) at ../../mono/utils/mono-os-mutex.h:103
#3  mono_coop_mutex_lock (mutex=0x55a0a66925a0 &lt;sgen_gc_mutex&gt;) at ../../mono/utils/mono-coop-mutex.h:54
#4  sgen_gc_lock () at sgen-gc.c:3766
#5  0x000055a0a62a7d68 in mono_gc_skip_thread_changing (skip=0) at sgen-mono.c:2080
#6  0x000055a0a630e5c3 in mono_thread_info_set_flags (flags=MONO_THREAD_INFO_FLAGS_NONE) at mono-threads.c:798
#7  0x000055a0a629a8d8 in finalizer_thread (unused=unused@entry=0x0) at gc.c:971
#8  0x000055a0a624fdae in start_wrapper_internal (stack_ptr=&lt;optimized out&gt;, start_info=0x0) at threads.c:1221
#9  start_wrapper (data=0x55a0a7485400) at threads.c:1294
#10 0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 2 (Thread 0x7f59203ff700 (LWP 62123)):
#0  0x00007f592102f17f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x000055a0a62f66bb in mono_os_cond_wait (mutex=0x55a0a668c7c0 &lt;lock&gt;, cond=0x55a0a668c780 &lt;work_cond&gt;) at ../../mono/utils/mono-os-mutex.h:177
#2  get_work (job=&lt;synthetic pointer&gt;, do_idle=&lt;synthetic pointer&gt;, work_context=&lt;synthetic pointer&gt;, worker_index=0) at sgen-thread-pool.c:165
#3  thread_func (data=&lt;optimized out&gt;) at sgen-thread-pool.c:196
#4  0x00007f59210294a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5920b54d0f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7f5921b65740 (LWP 62077)):
#0  0x00007f5920a9f3d6 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000055a0a63124c3 in suspend_signal_handler (_dummy=&lt;optimized out&gt;, info=&lt;optimized out&gt;, context=0x7ffcfe5a3880) at mono-threads-posix-signals.c:200
#2  &lt;signal handler called&gt;
#3  0x00007f592102f17d in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x000055a0a62f97ff in mono_os_cond_wait (mutex=0x55a0a668c980 &lt;signal_mutex&gt;, cond=0x7ffcfe5a3e90) at mono-os-mutex.h:177
#5  mono_os_event_wait_multiple (events=events@entry=0x7ffcfe5a3f08, nevents=nevents@entry=1, waitall=waitall@entry=1, timeout=timeout@entry=4294967295, alertable=alertable@entry=1) at os-event-unix.c:190
#6  0x000055a0a62f9a82 in mono_os_event_wait_one (event=&lt;optimized out&gt;, event@entry=0x7f5888005bf0, timeout=timeout@entry=4294967295, alertable=alertable@entry=1) at os-event-unix.c:94
#7  0x000055a0a63109fd in mono_thread_info_wait_one_handle (thread_handle=thread_handle@entry=0x7f5888005be0, timeout=timeout@entry=4294967295, alertable=alertable@entry=1) at mono-threads.c:1990
#8  0x000055a0a6195d97 in guarded_wait (timeout=4294967295, alertable=1, thread_handle=0x7f5888005be0) at appdomain.c:3016
#9  mono_domain_try_unload (domain=domain@entry=0x55a0af026d00, exc=exc@entry=0x7ffcfe5a4018) at appdomain.c:3118
#10 0x000055a0a6195ee6 in ves_icall_System_AppDomain_InternalUnload (domain_id=domain_id@entry=9, error=error@entry=0x7ffcfe5a42b0) at appdomain.c:2644
#11 0x000055a0a61d83be in ves_icall_System_AppDomain_InternalUnload_raw (a0=9, error=0x7ffcfe5a42b0) at ../../mono/metadata/icall-def.h:192
#12 0x000055a0a6150c36 in do_icall (sig=sig@entry=0x55a0a85b7e60, op=op@entry=545, sp=0x7ffcfe5a4290, sp@entry=0x7ffcfe5a42a0, ptr=ptr@entry=0x55a0a61d8380 &lt;ves_icall_System_AppDomain_InternalUnload_raw&gt;, frame=0x7ffcfe5a4670) at interp/interp.c:1899
#13 0x000055a0a6139abd in do_icall_wrapper (frame=0x7ffcfe5a4670, sig=0x55a0a85b7e60, op=545, sp=0x7ffcfe5a42a0, ptr=0x55a0a61d8380 &lt;ves_icall_System_AppDomain_InternalUnload_raw&gt;) at interp/interp.c:1983
#14 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7ffcfe5a4670, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3148
#15 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a48c0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#16 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a4b10, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#17 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a4ca0, context=0x55a0a7483f90, clause_args=0x1, clause_args@entry=0x0) at interp/interp.c:3316
#18 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x7f59204a8438, params=0x0, exc=0x0, error=0x7ffcfe5a5000) at interp/interp.c:1724
#19 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a77d6198, obj=&lt;optimized out&gt;, params=0x0, exc=0x0, error=0x7ffcfe5a5000) at mini-runtime.c:2985
#20 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a77d6198, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7ffcfe5a5000) at object.c:3016
#21 0x000055a0a623259b in mono_runtime_try_invoke_array (method=method@entry=0x55a0a77d6198, obj=obj@entry=0x7f59204a8438, params=params@entry=0x0, exc=exc@entry=0x0, error=error@entry=0x7ffcfe5a5000) at object.c:5563
#22 0x000055a0a6232850 in mono_runtime_invoke_array_checked (method=method@entry=0x55a0a77d6198, obj=obj@entry=0x7f59204a8438, params=params@entry=0x0, error=error@entry=0x7ffcfe5a5000) at object.c:5438
#23 0x000055a0a61cd267 in ves_icall_InternalInvoke (method=&lt;optimized out&gt;, this_arg=&lt;optimized out&gt;, params=0x0, exc=0x7ffcfe5a5550) at icall.c:3644
#24 0x000055a0a6150cd6 in do_icall (sig=sig@entry=0x55a0a7b65770, op=op@entry=550, sp=0x7ffcfe5a52d8, sp@entry=0x7ffcfe5a52f0, ptr=ptr@entry=0x55a0a61cd120 &lt;ves_icall_InternalInvoke&gt;, frame=0x7ffcfe5a5680) at interp/interp.c:1934
#25 0x000055a0a6139abd in do_icall_wrapper (frame=0x7ffcfe5a5680, sig=0x55a0a7b65770, op=550, sp=0x7ffcfe5a52f0, ptr=0x55a0a61cd120 &lt;ves_icall_InternalInvoke&gt;) at interp/interp.c:1983
#26 0x000055a0a613dae0 in interp_exec_method_full (frame=0x7ffcfe5a5680, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3148
#27 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a58d0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#28 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a5b30, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#29 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a5d80, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#30 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a5fc0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#31 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a6210, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#32 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a6480, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#33 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a6770, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#34 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a69c0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#35 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a6c70, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#36 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a6ed0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#37 0x000055a0a613d468 in interp_exec_method_full (frame=0x7ffcfe5a7170, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3129
#38 0x000055a0a613d468 in interp_exec_method_full (frame=0x7ffcfe5a73b0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3129
#39 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a7610, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#40 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a7850, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#41 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a7ab0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#42 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a7d10, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#43 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a7fb0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#44 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a8260, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#45 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a84c0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#46 0x000055a0a613d468 in interp_exec_method_full (frame=0x7ffcfe5a8760, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3129
#47 0x000055a0a613d468 in interp_exec_method_full (frame=0x7ffcfe5a89a0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3129
#48 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a8c00, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#49 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a8e40, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#50 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a90a0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#51 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a9300, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#52 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a95a0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#53 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5a9850, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#54 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5a9ab0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#55 0x000055a0a613d468 in interp_exec_method_full (frame=0x7ffcfe5a9d50, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3129
#56 0x000055a0a613d468 in interp_exec_method_full (frame=0x7ffcfe5a9f90, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3129
#57 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5aa1f0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#58 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5aa430, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#59 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5aa690, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#60 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5aa920, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#61 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5aaba0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#62 0x000055a0a613b7ad in interp_exec_method_full (frame=0x7ffcfe5aae80, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3241
#63 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5ab0c0, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#64 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5ab310, context=0x55a0a7483f90, clause_args=0x1) at interp/interp.c:3316
#65 0x000055a0a613b500 in interp_exec_method_full (frame=0x7ffcfe5ab4b0, context=0x55a0a7483f90, clause_args=0x1, clause_args@entry=0x0) at interp/interp.c:3316
#66 0x000055a0a61399b5 in interp_runtime_invoke (method=&lt;optimized out&gt;, obj=0x0, params=0x7ffcfe5ab748, exc=0x0, error=0x7ffcfe5ab7a0) at interp/interp.c:1724
#67 0x000055a0a6031f71 in mono_jit_runtime_invoke (method=0x55a0a7438668, obj=&lt;optimized out&gt;, params=0x7ffcfe5ab748, exc=0x0, error=0x7ffcfe5ab7a0) at mini-runtime.c:2985
#68 0x000055a0a6224f70 in do_runtime_invoke (method=0x55a0a7438668, obj=&lt;optimized out&gt;, params=&lt;optimized out&gt;, exc=&lt;optimized out&gt;, error=0x7ffcfe5ab7a0) at object.c:3016
#69 0x000055a0a622792d in do_exec_main_checked (method=0x55a0a7438668, args=&lt;optimized out&gt;, error=0x7ffcfe5ab7a0) at object.c:5118
#70 0x000055a0a603b8ba in mono_jit_exec_internal (argv=0x7ffcfe5abbf0, argc=6, assembly=0x0, domain=0x55a0a7431f40) at driver.c:1321
#71 mono_jit_exec (domain=domain@entry=0x55a0a7431f40, assembly=assembly@entry=0x55a0a7498de0, argc=argc@entry=6, argv=argv@entry=0x7ffcfe5abbf0) at driver.c:1266
#72 0x000055a0a603d054 in main_thread_handler (user_data=&lt;synthetic pointer&gt;) at driver.c:1398
#73 mono_main (argc=&lt;optimized out&gt;, argv=&lt;optimized out&gt;) at driver.c:2616
#74 0x000055a0a602d047 in mono_main_with_options (argv=&lt;optimized out&gt;, argc=&lt;optimized out&gt;) at main.c:50
#75 main (argc=&lt;optimized out&gt;, argv=&lt;optimized out&gt;) at main.c:408

=================================================================
	Basic Fault Address Reporting
=================================================================
Memory around native instruction pointer (0x7f5920a9efff):0x7f5920a9efef  d2 4c 89 ce bf 02 00 00 00 b8 0e 00 00 00 0f 05  .L..............
0x7f5920a9efff  48 81 c4 88 00 00 00 44 89 c0 5b c3 0f 1f 44 00  H......D..[...D.
0x7f5920a9f00f  00 48 8b 15 61 5e 36 00 f7 d8 64 89 02 eb ca 66  .H..a^6...d....f
0x7f5920a9f01f  90 85 ff 78 0c f7 df e9 e5 02 00 00 0f 1f 44 00  ...x..........D.

=================================================================
	Managed Stacktrace:
=================================================================
=================================================================
Aborted (core dumped)
make[1]: *** [run-test-lib] Error 1
../../build/tests.make:251: recipe for target 'run-test-lib' failed

```


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* Assertion: should not be reached at sgen-scan-object.h:91 #14732

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* Assertion: should not be reached at sgen-scan-object.h:91 #14732

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