[mypyc] Fix handling of invalid codepoint values in librt.strings#21634
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`isidentifier`, `tolower` and `toupper` would terminate the process if passed a too high Unicode codepoint value. Fix so that all the `is*` functions return false for invalid codepoints and `tolower`/`toupper` functions return them unchanged.
esarp
approved these changes
Jun 22, 2026
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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isidentifier,tolowerandtoupperwould terminate the process if passed a too high Unicode codepoint value. Fix so that all theis*functions return false for invalid codepoints andtolower/toupperfunctions return them unchanged.I used coding agent assist.