Re: Bash [[ foo =~ regex ]] behavior changed with last update, gentoo patches?

On Thu, 8 May 2025 at 15:31, David C Rankin <drankinatty@gmail.com> wrote:

this is a definite change from all prior bash versions

I checked the following command across several bash versions: [[ 38.0.0.0/8 =~ ^([^.]{1,3})[.]([^.]{1,3})[.]([^.]{1,3})[.]([^.]{1,3})$ ]]; echo $? ${BASH_REMATCH[@]} archlinux bash 5.2.037-5: 0 38.0.0.0/8 38 0 0 0/8 archlinux bash 5.2.037-2: 0 38.0.0.0/8 38 0 0 0/8 fedora bash-5.2.37-1.fc42.x86_64: 0 38.0.0.0/8 38 0 0 0/8 debian bash 5.2.15-2+b7: 0 38.0.0.0/8 38 0 0 0/8 I don't know what happened, but it doesn't look like regex matching changed behavior.