Cast to valid interface fails after Activator.CreateInstance #12676
Description
Steps to Reproduce
- Clone https://github.com/steveisok/mono.git and checkout refsrc-webforms-switch-activator-bug
- Build
- Run
make -w -C mcs/class/System.Web.Extensions run-standalone-test
Current Behavior
Test fails with the following:
2) DataPager_NumericPagerField_Bug615315, Test 02
Test: StandAloneTests.DataPager_NumericPagerField_Bug615315.Test_02
Description: Page numbers must be sequential (PostBack Mode)
Failed URL: Test_PostBackMode.aspx
Callback method: Void StandAloneTests.DataPager_NumericPagerField_Bug615315.Test_02.TestPostBackMode_Aspx_Start(System.String, StandAloneRunnerSupport.TestRunItem)
Failure details:
Test failed with exception of type 'System.InvalidCastException':
System.InvalidCastException: Specified cast is not valid.
Server stack trace:
at System.Web.Hosting.HostingEnvironment.CreateWellKnownObjectInstance (System.String assemblyQualifiedName, System.Boolean failIfExists) [0x00037] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/referencesource/System.Web/Hosting/HostingEnvironment.cs:759
at (wrapper managed-to-native) System.Runtime.Remoting.RemotingServices.InternalExecute(System.Reflection.MethodBase,object,object[],object[]&)
at System.Runtime.Remoting.RemotingServices.InternalExecuteMessage (System.MarshalByRefObject target, System.Runtime.Remoting.Messaging.IMethodCallMessage reqMsg) [0x000ad] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/corlib/System.Runtime.Remoting/RemotingServices.cs:150
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke (System.Runtime.Remoting.Proxies.RealProxy rp, System.Runtime.Remoting.Messaging.IMessage msg, System.Exception& exc, System.Object[]& out_args) [0x001aa] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/corlib/System.Runtime.Remoting.Proxies/RealProxy.cs:326
at (wrapper managed-to-native) System.Object.__icall_wrapper_mono_remoting_wrapper(intptr,intptr)
at (wrapper remoting-invoke) System.Web.Hosting.HostingEnvironment.CreateWellKnownObjectInstance(string,bool)
at (wrapper xdomain-invoke) System.Web.Hosting.HostingEnvironment.CreateWellKnownObjectInstance(string,bool)
at (wrapper remoting-invoke-with-check) System.Web.Hosting.HostingEnvironment.CreateWellKnownObjectInstance(string,bool)
at System.Web.Hosting.ApplicationManager.CreateObjectInternal (System.String appId, System.Type type, System.Web.Hosting.IApplicationHost appHost, System.Boolean failIfExists, System.Web.Hosting.HostingEnvironmentParameters hostingParameters) [0x00040] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/referencesource/System.Web/Hosting/ApplicationManager.cs:293
at System.Web.Hosting.ApplicationManager.CreateObject (System.String appId, System.Type type, System.String virtualPath, System.String physicalPath, System.Boolean failIfExists, System.Boolean throwOnError) [0x0002f] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/referencesource/System.Web/Hosting/ApplicationManager.cs:256
at System.Web.Hosting.ApplicationManager.CreateObject (System.String appId, System.Type type, System.String virtualPath, System.String physicalPath, System.Boolean failIfExists) [0x00000] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/referencesource/System.Web/Hosting/ApplicationManager.cs:234
at (wrapper remoting-invoke-with-check) System.Web.Hosting.ApplicationManager.CreateObject(string,System.Type,string,string,bool)
at StandAloneRunnerSupport.StandaloneTest.RunInternal (System.Web.Hosting.ApplicationManager appMan, System.Boolean verbose) [0x00233] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/System.Web/Test/standalone-runner-support/StandaloneTest.cs:187
at StandAloneRunnerSupport.StandaloneTest.Run (System.Web.Hosting.ApplicationManager appMan, System.Boolean verbose) [0x00007] in /Users/steveman/dev/dotnet/mono-rebase-build/mcs/class/System.Web/Test/standalone-runner-support/StandaloneTest.cs:108
Here's the specific line where the cast fails
(mcs/class/referencesource/System.Web/Hosting/HostingEnvironment.cs)
obj = (IRegisteredObject)Activator.CreateInstance(type);The type that is trying to be loaded is TestRunner, which implements IRegisterObject and is found at
(mcs/class/System.Web/Test/standalone-runner-support/TestRunner.cs)
public sealed class TestRunner : MarshalByRefObject, IRegisteredObject, ITestRunnerNote that these types of tests that use HostingEnvironment succeed using nunit-lite.
Expected Behavior
The type at the very least should be loaded and the test should pass.
On which platforms did you notice this
[x] macOS
[x] Linux
[] Windows
Version Used:
Mono JIT compiler version 5.23.0 (refsrc-webforms-switch/b9edcc82c68 Sat Jan 26 08:10:32 EST 2019)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
TLS:
SIGSEGV: altstack
Notification: kqueue
Architecture: amd64
Disabled: none
Misc: softdebug
Interpreter: yes
LLVM: supported, not enabled.
Suspend: hybrid
GC: sgen (concurrent by default)
Stacktrace
Please paste the stack trace here if available.