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Crash on _PyDict_CheckConsistency with an empty instance dict #121860

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3.13bugs and security fixes3.14bugs and security fixesrelease-blockertype-crashA hard crash of the interpreter, possibly with a core dump
@pablogsal

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@pablogsal

When running a complicated application that involves Cython I am getting the following crash:

Objects/dictobject.c:716: _PyDict_CheckConsistency: Assertion failed: mp->ma_values->valid == 1Enable tracemalloc to get the memory block allocation tracebackobject address  : 0x21bbd30object refcount : 1object type     : 0x9cb9e0object type name: dictobject repr     : {}Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailedPython runtime state: finalizing (tstate=0x0000000000a522b8)Current thread 0x00007ffff7fe2740 (most recent call first):  Garbage-collecting  <no Python frame>Extension modules: xxx._ext, xxx._ext, xxx._tcp_impl (total: 3)Thread 1 "python" received signal SIGABRT, Aborted.

I am trying to get a smaller reproducer that doesn't involve the entire world out of the application, but it may take me a while.

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    3.13bugs and security fixes3.14bugs and security fixesrelease-blockertype-crashA hard crash of the interpreter, possibly with a core dump

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