`JIT/IL_Conformance/Convert/TestConvertFromIntegral/TestConvertFromIntegral` failing in CI with "Assert failure: `arrayBaseRef->GetArrayElementType() == ELEMENT_TYPE_OBJECT`"

[jakobbotsch]

Example pipeline run (gcstress in this case): https://dev.azure.com/dnceng-public/public/_build/results?buildId=748823&view=results
Example console log: https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-105181-merge-0ee628e940694b27bb/IL_Conformance.0.1/1/console.238ae2ed.log?helixlogtype=result

16:32:00.456 Running test: JIT/IL_Conformance/Convert/TestConvertFromIntegral/TestConvertFromIntegral.dll

Assert failure(PID 22 [0x00000016], Thread: 22 [0x0016]): arrayBaseRef->GetArrayElementType() == ELEMENT_TYPE_OBJECT
    File: /__w/1/s/src/coreclr/vm/comutilnative.cpp:438
    Image: /root/helix/work/correlation/corerun

...

Stack trace:
----------------------------------
Thread Id: 0x16
      Child SP               IP Call Site
 0xffffdc241e80 0xffffa8028c0c libc.so.6!wait4
 0xffffdc241ec0 0xffffa7e42bec libcoreclr.so!PROCCreateCrashDump(std::vector<char const*, std::allocator<char const*> >&, char*, int, bool) at /__w/1/s/src/coreclr/pal/src/thread/process.cpp:0:0
 0xffffdc241f30 0xffffa7e43ce8 libcoreclr.so!PROCCreateCrashDumpIfEnabled at /__w/1/s/src/coreclr/pal/src/thread/process.cpp:2526:9
 0xffffdc241fb0 0xffffa7e40bf4 libcoreclr.so!PROCAbort at /__w/1/s/src/coreclr/pal/src/thread/process.cpp:2559:5
 0xffffdc241fd0 0xffffa7e40a70 libcoreclr.so!CorUnix::TerminateCurrentProcessNoExit(int) at /__w/1/s/src/coreclr/pal/src/thread/process.cpp:3240:0
 0xffffdc243270 0xffff67747044 0xffff67747044
 0xffffdc243350 0xffff6774711c System.Private.CoreLib.dll!System.Exception.get_TargetSite()
 0xffffdc243370 0xffff67747c44 System.Private.CoreLib.dll!System.Exception.get_Source()
 0xffffdc243390 0xffff67747168 System.Private.CoreLib.dll!System.Exception.InternalPreserveStackTrace()
 0xffffdc2433b0 0xffffa7c220b8 0xffffa7c220b8
 0xffffdc2433d0 0xffffa79ede98 libcoreclr.so!NativeExceptionHolderBase::~NativeExceptionHolderBase() at ??:0:0
 (inlined by) CallDescrWorkerWithHandler(CallDescrData*, int) at ??:65:5
 0xffffdc243430 0xffffa79ee72c libcoreclr.so!MethodDescCallSite::CallTargetWorker(unsigned long const*, unsigned long*, int) at ??:0:0
 0xffffdc2436a0 0xffffa78bceec libcoreclr.so!ExceptionPreserveStackTrace(OBJECTREF) at ??:0:0
 0xffffdc2437f0 0xffffa7b5b2b4 libcoreclr.so!DispatchManagedException(OBJECTREF, _CONTEXT*, bool) at ??:0:0
 0xffffdc244bf0 0xffffa7b5af7c libcoreclr.so!DispatchManagedException(PAL_SEHException&, bool) at ??:0:0
 0xffffdc245040 0xffffa7ae4c50 libcoreclr.so!RuntimeMethodHandle::InvokeMethod(Object*, void**, SignatureNative*, bool) at ??:0:0
 0xffffdc245540 0xffff679a8bfc System.Private.CoreLib.dll!System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(System.Object, System.Reflection.BindingFlags)
 0xffffdc245580 0xffff679efb7c System.Private.CoreLib.dll!System.Reflection.Emit.DynamicMethod.Invoke(System.Object, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo)
 0xffffdc2455d0 0xffff6a2c7280 TestConvertFromIntegral.dll!TestCasts.Program.GenerateTest[[System.Int32, System.Private.CoreLib],[System.SByte, System.Private.CoreLib]](Int32, System.Reflection.Emit.OpCode, System.Reflection.Emit.OpCode, Boolean, SByte, Boolean)
 0xffffdc245650 0xffff6a2c6d84 TestConvertFromIntegral.dll!TestCasts.Program.TestConvertFromInt4ToI1()
 0xffffdc245680 0xffff6a2c6a7c TestConvertFromIntegral.dll!TestCasts.Program.TestConvertFromInt4()
 0xffffdc245690 0xffff6a2c696c TestConvertFromIntegral.dll!TestCasts.Program.TestEntryPoint()
 0xffffdc2456a0 0xffff6a2c6620 IL_Conformance.dll!Program.<<Main>$>g__TestExecutor399|0_400(System.IO.StreamWriter, System.IO.StreamWriter, <>c__DisplayClass0_0 ByRef)
 0xffffdc245720 0xffff68fb5640 IL_Conformance.dll!Program.<Main>$(System.String[])

@AaronRobinsonMSFT Could this be related to #105103?

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[AaronRobinsonMSFT]

Yes, this is definitely related to my changes.