[3.14] gh-155752: Do not crash when GenericAlias parameters change during substitution (GH-155761) - #155771
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[3.14] gh-155752: Do not crash when GenericAlias parameters change during substitution (GH-155761)#155771miss-islington wants to merge 1 commit into
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…ing substitution (pythonGH-155761) An alias argument can gain __typing_subst__ after __parameters__ has been cached, including during a preparation or substitution callback. Check that the argument is present before indexing the substitution arguments. (cherry picked from commit c0006fa) Co-authored-by: Darius Houle <dariushoule@gmail.com>
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August 14, 2026 05:14
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An alias argument can gain typing_subst after parameters has been cached, including during a preparation or substitution callback. Check that the argument is present before indexing the substitution arguments.
(cherry picked from commit c0006fa)
Co-authored-by: Darius Houle dariushoule@gmail.com