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locale.setlocale() crashes on Windows for long locale name #137273

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locale.setlocale() crashes on Windows for long locale name#137273
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serhiy-storchaka
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3.13only security fixes3.14bugs and security fixes3.15pre-release feature fixes, bugs and security fixesOS-windowsextension-modulesC modules in the Modules dirtype-crashA hard crash of the interpreter, possibly with a core dump

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@serhiy-storchaka
serhiy-storchaka
opened on Jul 31, 2025

Crash report

locale.setlocale(locale.LC_CTYPE, 'ks_IN.UTF-8@devanagari') crashes.
locale.setlocale(locale.LC_CTYPE, 'ks_IN.UTF8@devanagari') just raises a locale.Error.

It's not just about length. Standard locale names in Windows (like 'English_United States.1252') are pretty long.

Tested and reproduced in 3.12, 3.13, 3.14, and main, on Windows 10.

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3.13only security fixes3.14bugs and security fixes3.15pre-release feature fixes, bugs and security fixesOS-windowsextension-modulesC modules in the Modules dirtype-crashA hard crash of the interpreter, possibly with a core dump

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