[issue43779] Fix possible parser/AST ref leaks

[Pablo Galindo Salgado]

Pablo Galindo Salgado <pablogsal at gmail.com> added the comment:


New changeset 76d270ec2b776cc5331935cc58c2d63622f1c0e9 by Erlend Egeberg Aasland in branch '3.9':
[3.9] bpo-43779: Fix possible refleak involving _PyArena_AddPyObject (GH-25289). (GH-25294)
https://github.com/python/cpython/commit/76d270ec2b776cc5331935cc58c2d63622f1c0e9


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<https://bugs.python.org/issue43779>
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