pythonnet / pythonnet/pythonnet

Unhandled exception related to pythonnet

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C#
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Description

an Unhandled exception was observed related to pythonnet.
execution environment:
OS: Linux
RAM: 64
the exception is:
Unhandled exception. Python.Runtime.InternalPythonnetException: Failed to create Python type for PrimaITestCaseLibrary.MessageManagment.IMessageSomeIP
---> System.NullReferenceException: Object reference not set to an instance of an object.
at Python.Runtime.BorrowedReference.op_Implicit(PyObject pyObject) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Native/BorrowedReference.cs:line 52
at Python.Runtime.TypeManager.AllocateTypeObject(String name, PyType metatype) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/TypeManager.cs:line 600
at Python.Runtime.ReflectedClrType.AllocateClass(Type clrType) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Types/ReflectedClrType.cs:line 117
at Python.Runtime.ReflectedClrType.GetOrCreate(Type type) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Types/ReflectedClrType.cs:line 38
— End of inner exception stack trace —
at Python.Runtime.ReflectedClrType.GetOrCreate(Type type) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Types/ReflectedClrType.cs:line 54
at Python.Runtime.ClassManager.GetClassImpl(Type type) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/ClassManager.cs:line 140
at Python.Runtime.Converter.ToPython(Object value, Type type) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Converter.cs:line 144
at Python.Runtime.MethodBinder.Invoke(BorrowedReference inst, BorrowedReference args, BorrowedReference kw, MethodBase info, MethodBase[] methodinfo) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/MethodBinder.cs:line 968
at Python.Runtime.MethodBinding.tp_call(BorrowedReference ob, BorrowedReference args, BorrowedReference kw) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Types/MethodBinding.cs:line 166

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Research direction

Start by reproducing the Linux failure and trace it through Python.Runtime.BorrowedReference.cs, TypeManager.cs, ReflectedClrType.cs, ClassManager.cs, Converter.cs, and MethodBinder.cs at the locations in the report. The issue provides no minimal reproduction or expected behavior, so confirm those details before determining what a fix and regression test should establish.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, python
Domain
tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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