Sourced from regex's changelog.

1.5.5 (2022年03月08日)

This releases fixes a security bug in the regex compiler. This bug permits a vector for a denial-of-service attack in cases where the regex being compiled is untrusted. There are no known problems where the regex is itself trusted, including in cases of untrusted haystacks.

• SECURITY #GHSA-m5pq-gvj9-9vr8: Fixes a bug in the regex compiler where empty sub-expressions subverted the existing mitigations in place to enforce a size limit on compiled regexes. The Rust Security Response WG published an advisory about this: https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw

1.5.4 (2021年05月06日)

This release fixes another compilation failure when building regex. This time, the fix is for when the pattern feature is enabled, which only works on nightly Rust. CI has been updated to test this case.

• [BUG #772](rust-lang/regex#772): Fix build when pattern feature is enabled.

1.5.3 (2021年05月01日)

This releases fixes a bug when building regex with only the unicode-perl feature. It turns out that while CI was building this configuration, it wasn't actually failing the overall build on a failed compilation.

• [BUG #769](rust-lang/regex#769): Fix build in regex-syntax when only the unicode-perl feature is enabled.

1.5.2 (2021年05月01日)

This release fixes a performance bug when Unicode word boundaries are used. Namely, for certain regexes on certain inputs, it's possible for the lazy DFA to stop searching (causing a fallback to a slower engine) when it doesn't actually need to.

[PR #768](rust-lang/regex#768) fixes the bug, which was originally reported in ripgrep#1860.

1.5.1 (2021年04月30日)

This is a patch release that fixes a compilation error when the perf-literal feature is not enabled.

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• d130381 1.5.5
• ae70b41 security: fix denial-of-service bug in compiler
• b92ffd5 cargo: use SPDX license format
• f6e52da syntax: fix 'unused' warnings
• 5197f21 fuzz: do not use inherits in Cargo.toml
• 3662851 doc: fix typo
• 63ee669 syntax/doc: fix 'their' typo
• d6bc7a4 readme: remove broken badge
• bd74660 fuzz: try to fix build issue
• bd0a142 readme: fix badges
• Additional commits viewable in compare view

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