AppVeyor recently upgraded their Ubuntu image to use Mono 6.0.0.313 instead of 5.20.1.19. Since that upgrade, I am seeing repeated messages of the form "ves_icall_TypeBuilder_create_runtime_class_raw USED n handles" in the CI build log; see e.g. https://ci.appveyor.com/project/castleproject/core/builds/26641027/job/37hyn438mke9aoct#L115.

(Yes, that project is using TypeBuilder to create types; the issue is that this debug message shouldn't be printed to the console no matter what.)

In issue #15247, this was reported as fixed in master. Has there been a regression?

Steps to Reproduce

1. Check out https://github.com/castleproject/Core.
2. Build the project on a machine with Mono 6 and the .NET CLI using the build script (./build.sh).

Alternatively, check out the build log linked to above.

Current Behavior

Lots of messages of the form "ves_icall_TypeBuilder_create_runtime_class_raw USED handles" are printed to the console.

Expected Behavior

These debug messages are too verbose, they shouldn't be printed to the console unless some verbosity level is explicitly raised to some debug/diagnostic level.

On which platforms did you notice this

[ ] macOS
[X] Linux: AppVeyor for Linux (Ubuntu 16.04 image)
[ ] Windows

Version Used:

Mono JIT compiler version 6.0.0.313 (tarball Sun Jul 14 09:59:19 UTC 2019)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug 
	Interpreter:   yes
	LLVM:          yes(600)
	Suspend:       hybrid
	GC:            sgen (concurrent by default)