See the new test class in#901

AccessViolationException gets thrown in the linePyImport_ImportModule("platform") inRuntime.InitializePlatformData when a release build is tested using NUnit console runner.

nunit3-console.exe --x86 src\embed_tests\bin\publish\Python.EmbeddingTest.dll

Removal of initialization code makes tests succeed:

[OneTimeSetUp]publicvoidSetUp(){PythonEngine.Initialize();}[OneTimeTearDown]publicvoidDispose(){PythonEngine.Shutdown();}

The initialization code on its own may not be the cause, as there are other classes, that use the same pattern. Must be something in conjunction with the actual tests.

Note, that disabling feature implemented by#901 by commenting out code inTypeManager does not resolve the problem, e.g. it crashes anyway.