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Thu Nov 22 11:57:20 CET 2007 · https://mail.python.org/pipermail/python-dev/2007-November/075295.html

An extension module I use makes extensive use of the PyGILState API's  
in callback functions for C APIs. Some of the functions that use the  
PyGILState APIs are used in the tp_dealloc of methods. This seems  
cause problems when objects are cleaned up during interpreter  
shutdown: when an object is deallocated during  
PyInterpreterState_Clear I get a hard crash because the GILState  
machinery has been shut down at that time :-(

The bug report for this: http://bugs.python.org/issue1402

The report includes a patch, but I know just enough about the python  
threading infrastructure to be dangerous and am not convinced that the  
patch is actually correct.

Ronald
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[Python-Dev] A crash during interpreter cleanup when using PyGILState APIs