| commit | f062244cdbbab374c8559fbdb6fa1ff153732e0c | [log] [tgz] |
|---|---|---|
| author | Andy Heninger <andy.heninger@gmail.com> | Sat Feb 13 13:28:10 2021 -0800 |
| committer | Frank Yung-Fong Tang <ftang@google.com> | Wed Feb 17 18:49:55 2021 -0800 |
| tree | b4145973f8d8a4d897d6b06151f6710fd325af2f | |
| parent | 352b4811465741f9094861301fd6933e3b9aed9b [diff] |
ICU-21492 Fix regex compile assertion failure. A regex pattern containing nested look-behind blocks could trigger an assertion failure during pattern compilation. The problem was caused by an off-by-one error in the code that computes an upper bound on the match length, needed because look-behind expressions are constrained to not have unbounded match length. Nested look-behind blocks come into play because, when computing the maximum match length of an outer block, any inner look-behind blocks are skipped over - they do not directly contribute to the length matched by the outer block. The problem was in the code that skips over these nested look-behind blocks.
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icu4c/ ICU for C/C++icu4j/ ICU for Javatools/ Toolsvendor/ Vendor dependenciesPlease see ./icu4c/LICENSE (C and J are under an identical license file.)
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