System.Runtime.InteropServices.JavaScript.Tests.MarshalTests.TestFunctionApply failed on CI (wasm mono subset)

[maryamariyan]

Some wasm test failures on the PR #39825:
https://dev.azure.com/dnceng/public/_build/results?buildId=749999&view=ms.vss-test-web.build-test-results-tab

System.Linq.Expressions.Tests
System.Runtime.InteropServices.JavaScript.Tests

e.g.: System.Runtime.InteropServices.JavaScript.Tests.MarshalTests.TestFunctionApply

Error message
System.Runtime.InteropServices.JavaScript.JSException : Error: System.NullReferenceException: Object reference not set to an instance of an object.\n   at System.Runtime.InteropServices.JavaScript.Tests.HelperMarshal.CreateFunctionApply()

Stack trace
   at Interop.Runtime.InvokeJS(String str)
   at System.Runtime.InteropServices.JavaScript.Runtime.InvokeJS(String str)
   at System.Runtime.InteropServices.JavaScript.Tests.MarshalTests.TestFunctionApply()
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

[MaximLipnin]

It seems to be flaky - I got the failure 4 times out of 10 locally.

[MaximLipnin]

Besides that, there can be something like:

  dbug: test[0]
        [FAIL] System.Runtime.InteropServices.JavaScript.Tests.JavaScriptTests.FunctionMath
  dbug: test[0]
        Assert.NotNull() Failure
  dbug: test[0]
           at System.Runtime.InteropServices.JavaScript.Tests.JavaScriptTests.FunctionMath()
  dbug: test[0]
           at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

[MaximLipnin]

The failing tests will be disabled in #40139

[lewing]

This failure seems to go away if you pass --disable-on-demand-gc so it is likely related to the on-demand GC, either a bug there or ref counting/pinning issues in the bindings.

[lewing]

cc @vargaz