[libcxx-commits] [libcxx] [regex] fix uncaught exception when string is like "\\_" (PR #129348)

[Mark de Wever via libcxx-commits]

https://github.com/mordante approved this pull request.

Thanks, LGTM!

Do you need somebody to land this patch for you?

https://github.com/llvm/llvm-project/pull/129348