tree 2d73071bb42fe4496d11d79007eb4930fe5fd673
parent 212d32f45c91849c17a82750df1ac498d63976be
author Victor Stinner <vstinner@python.org> 1604423235 +0100
committer GitHub <noreply@github.com> 1604423235 +0100
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bpo-41796: Call _PyAST_Fini() earlier to fix a leak (GH-23131)

Call _PyAST_Fini() on all interpreters, not only on the main
interpreter. Also, call it ealier to fix a reference leak.

Python types contain a reference to themselves in in their
PyTypeObject.tp_mro member. _PyAST_Fini() must called before the last
GC collection to destroy AST types.

_PyInterpreterState_Clear() now calls _PyAST_Fini(). It now also
calls _PyWarnings_Fini() on subinterpeters, not only on the main
interpreter.

Add an assertion in AST init_types() to ensure that the _ast module
is no longer used after _PyAST_Fini() has been called.