[vim/vim] NFA literal matches miss characters with different case-folded widths (PR #21438)

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Volodymyr Chernetskyi

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Oct 3, 2026, 1:37:58 PM (3 days ago) Oct 3

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What does this change do?

Problem: NFA literal matches miss characters with different case-folded
widths, including when retrying after a failed suffix match.

Solution: Advance past the actual input character in both paths and test
string and buffer searches (Volodymyr Chernetskyi).

related: #14294

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Checklist

The commit message follows the Problem/Solution form above
Signed-off-by: trailer is present (git commit -s), recommended but not required
Tests were added, existing tests cover the change, or the change cannot be tested (say why)
Documentation under runtime/doc/ was updated, or no update is needed

You can view, comment on, or merge this pull request online at:

https://github.com/vim/vim/pull/21438

Commit Summary

2570066 patch 9.2.NNNN: NFA literal matches miss characters with different case-folded widths

File Changes

(2 files)

M src/regexp_nfa.c (10)
M src/testdir/test_regexp_utf8.vim (30)

Patch Links:

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