Hi, i have identified what looks to be a bug in grep v3.10, the bug is not present in v3.8 or v3.9, to reproduce the bug please see the attached bash script.

The bug looks related to the use of the regex [^\d]+ which then ends up resulting in no match.

If you need any more details then please let me know, I am very keen to get this bug squashed as I make heavy use of grep in my scripts.

Many Thanks!.