Public bug reported: This bug was introduced upstream with grep 3.4. Originally reported in Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1029235#19
On an ubuntu focal machine: echo 'Total failed: 2 (1 ignored)' | grep -e '^Total failed: 0$' -e '^Total failed: \([0-9]*\) (\1 ignored)$' Total failed: 2 (1 ignored) A fixed grep doesn't match the line. This has been fixed in debian unstable with 3.8-4, and in bullseye with 3.6-1+deb11u1. I've tested the attached patch in ubuntu focal (grep 3.4) ** Affects: grep (Ubuntu) Importance: Undecided Status: New ** Patch added: "1029235-grep-bug-backref-in-last-of-multiple-patterns.patch" https://bugs.launchpad.net/bugs/2007155/+attachment/5646814/+files/1029235-grep-bug-backref-in-last-of-multiple-patterns.patch -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to grep in Ubuntu. https://bugs.launchpad.net/bugs/2007155 Title: grep: sometimes mistakenly matches lines when last of multiple patterns includes backref Status in grep package in Ubuntu: New Bug description: This bug was introduced upstream with grep 3.4. Originally reported in Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1029235#19 On an ubuntu focal machine: echo 'Total failed: 2 (1 ignored)' | grep -e '^Total failed: 0$' -e '^Total failed: \([0-9]*\) (\1 ignored)$' Total failed: 2 (1 ignored) A fixed grep doesn't match the line. This has been fixed in debian unstable with 3.8-4, and in bullseye with 3.6-1+deb11u1. I've tested the attached patch in ubuntu focal (grep 3.4) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grep/+bug/2007155/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp