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September 18, 2026 12:01
Compared to https://unicode.org/Public/17.0.0/ucd/ReadMe.txt, 18.0.0's ReadMe.txt refers to "Unicode Character Database", not "Unicode Standard".
The codepoint, LATIN SMALL LIGATURE LONG S WITH DESCENDER, is located in plane 1. In either simple or full case folding, it folds into plane 0 codepoints, which broke the older assumption that case folding rules don't cross planes.
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#162929 is currently in the process of being merged, and this would conflict with that. |
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☔ The latest upstream changes made this pull request unmergeable. Please resolve the merge conflicts by rebasing. |
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Closing for that reason. |
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Unicode 18 is officially out: https://blog.unicode.org/2026/09/announcing-unicode-standard-version-180.html
Consolidated my commits into self-contained ones with helpful messages based on @clarfonthey's feedback
Also retained
assert_eq!withinsrc/tools/unicode-table-generator/src/case_mapping.rsand added special handling for U+1FD95's case folding rule