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[3.9] bpo-41194: The _ast module cannot be loaded more than once (GH-21290) (GH-21292)
* bpo-41194: Pass module state in Python-ast.c (GH-21284) Rework asdl_c.py to pass the module state to functions in Python-ast.c, instead of using astmodulestate_global. Handle also PyState_AddModule() failure in init_types(). (cherry picked from commit 74419f0) * bpo-41194: The _ast module cannot be loaded more than once (GH-21290) Fix a crash in the _ast module: it can no longer be loaded more than once. It now uses a global state rather than a module state. * Move _ast module state: use a global state instead. * Set _astmodule.m_size to -1, so the extension cannot be loaded more than once. (cherry picked from commit 91e1bc1)
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‎Misc/NEWS.d/next/Library/2020-07-03-13-15-08.bpo-41194.djrKjs.rst‎

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Fix a crash in the ``_ast`` module: it can no longer be loaded more than once.
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It now uses a global state rather than a module state.

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