Thanks for the quick response! I wonder if this issue could be macOS-specific? I just tried building git from sources, and I was able to reproduce the issue with 2.39.3: $ ./git --version git version 2.39.3 $ ./git grep -E '\bupdate\b' But everything works okay for me with 2.38.5: $ ./git --version git version 2.38.5 kevin@MBP-P2MQ:~/projects/git [(HEAD detached at v2.38.5)] $ ./git grep -E '\bupdate\b' .github/workflows/l10n.yml: sudo apt-get update -q && .gitignore:/git-update-index .gitignore:/git-update-ref < ... etc ...> I see this bit in the release notes, which seems potentially related: https://github.com/git/git/blob/69c786637d7a7fe3b2b8f7d989af095f5f49c3a8/Documentation/RelNotes/2.39.0.txt#L64-L65 And indeed, I can't reproduce the issue if I compile git 2.39.3 with 'make NO_REGEX=1'. So, perhaps a difference between git's compat regex library and the one provided by macOS? Thanks, Kevin On Wed, May 3, 2023 at 12:35 PM Junio C Hamano <gitster@xxxxxxxxx> wrote: > > Kevin Ushey <kevinushey@xxxxxxxxx> writes: > > > I'm seeing the following, which I believe is unexpected. I have a file > > with contents: > > > > $ cat hello.txt > > WholeWord > > Whole Word > > Whole > > > > I can use `git grep` to search with word boundaries; e.g. > > > > $ git grep --untracked '\bWhole\b' > > hello.txt:Whole Word > > hello.txt:Whole > > > > However, if I add `-E` to use extended regular expressions, the same > > invocation finds no search results. > > > > $ git grep --untracked -E '\bWhole\b' > > Does not seem to reproduce for me. In a randomly picked repository > (the source to git itself), I did > > $ cat >hello.txt > WholeWord > Whole Word > Whole > ^D > > and "git grep --untracked -E '\bWhole\b' hello.txt" with or without > the "-E" option shows the same two lines as hits. > > Without the pathspec hello.txt, the output includes one line from > unpack-trees.c as well, but the hits from the untracked hello.txt > are the same. > > The tip of 'master', v2.40.0, v2.38.4, v2.37.4, v2.35.4 (they are by > no means significant milestones---just some random versions I picked > to test) all behave the same way.
