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[3.15] gh-155218: Generate the option group flags in a stable order (GH-155219) - #155226

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[3.15] gh-155218: Generate the option group flags in a stable order (GH-155219)#155226
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@serhiy-storchaka serhiy-storchaka commented Aug 5, 2026

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They were emitted in the iteration order of a set of group identifiers.
The identifiers of the groups before the required parameters are small
negative integers, -1 and -2 have the same hash, so their order depended
on the size of Py_hash_t, and the code generated on a 32-bit platform
differed from the checked in one.

They are now emitted in the order of the parameters.
(cherry picked from commit 7aec160)

Co-authored-by: Serhiy Storchaka storchaka@gmail.com
Co-Authored-By: Claude Opus 5 (1M context) noreply@anthropic.com

…ythonGH-155219)

They were emitted in the iteration order of a set of group identifiers.
The identifiers of the groups before the required parameters are small
negative integers, -1 and -2 have the same hash, so their order depended
on the size of Py_hash_t, and the code generated on a 32-bit platform
differed from the checked in one.

They are now emitted in the order of the parameters.
(cherry picked from commit 7aec160)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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