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Description
Environment
- Pythonnet version: 3.0.5
- Python version: both 3.12 and 3.13
- Operating System: MacOS Sequoia 15.1.1
- .NET Runtime: both 7.0.410 and 8.0.403
Details
- Describe what you were trying to get done.
Remove an element from a .NET Dictionary using the del operator (__delitem__).
- What commands did you run to trigger this issue?
If you can provide aMinimal, Complete, and Verifiable example this will help us understand the issue.
I reduced the problem to the following example, simply run from the command line:
importpythonnetpythonnet.load('coreclr')print(pythonnet.get_runtime_info(),end='\n\n')importclrfromSystem.Collections.GenericimportDictionaryfromSystemimportInt32,StringDT=Dictionary[Int32,String]d=DT()d[10]='10'd[20]='20'print('__delitem__ is implemented by {}'.format(next(iter(clsforclsinDT.mro()ifhasattr(cls,'__delitem__')))))deld[20]# crash
- If there was a crash, please include the traceback here.
The program crashed with the following output:
Runtime: CoreCLR============= Version: <undefined> Initialized: True Shut down: False Properties: HOST_RUNTIME_CONTRACT = 0x600003a840c8 PROBING_DIRECTORIES = RUNTIME_IDENTIFIER = osx-arm64 FX_DEPS_FILE = /usr/local/share/dotnet/shared/Microsoft.NETCore.App… APP_CONTEXT_DEPS_FILES = /usr/local/share/dotnet/shared/Microsoft.N… APP_CONTEXT_BASE_DIRECTORY = PLATFORM_RESOURCE_ROOTS = : NATIVE_DLL_SEARCH_DIRECTORIES = :/usr/local/share/dotnet/shared/Mic… TRUSTED_PLATFORM_ASSEMBLIES = /usr/local/share/dotnet/shared/Micros…__delitem__ is implemented by <class 'System.Collections.Generic.Dictionary[Int32,String]'>Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object. at Python.Runtime.BorrowedReference.DangerousGetAddress() in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Native/BorrowedReference.cs:line 18 at Python.Runtime.NewReference..ctor(BorrowedReference reference, Boolean canBeNull) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Native/NewReference.cs:line 20 at Python.Runtime.Runtime.PyTuple_SetItem(BorrowedReference pointer, IntPtr index, BorrowedReference value) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Runtime.cs:line 1482 at Python.Runtime.ClassBase.mp_ass_subscript_impl(BorrowedReference ob, BorrowedReference idx, BorrowedReference v) in /home/benedikt/.cache/uv/sdists-v6/.tmpkW03e6/pythonnet-3.0.5/src/runtime/Types/ClassBase.cs:line 498[1] 56976 abort python3.12 /tmp/ramdisk/delme_test_pythonnet.pyNotice that__delitem__ is also implemented by theMutableMappingMixin classhere, which simply calls theRemove() method, butDictionary has its own implementation (that I can't find), which takes precedence.
The former would have worked correctly (tested), asRemove() works as usual.