[Bug 274032] Regression after stable/12: grep: trailing backslash (\)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274032

--- Comment #10 from commit-hook@FreeBSD.org ---
A commit in branch releng/14.0 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=408daf2caa9273b1cbdc8223a3da6e179e922fc2

commit 408daf2caa9273b1cbdc8223a3da6e179e922fc2
Author:     Christos Zoulas <christos@NetBSD.org>
AuthorDate: 2023-08-30 20:37:24 +0000
Commit:     Kyle Evans <kevans@FreeBSD.org>
CommitDate: 2023-10-01 04:46:02 +0000

    regcomp: use unsigned char when testing for escapes

    - cast GETNEXT to unsigned where it is being promoted to int to prevent
      sign-extension (really it would have been better for PEEK*() and
      GETNEXT() to return unsigned char; this would have removed a ton of
      (uch) casts, but it is too intrusive for now).
    - fix an isalpha that should have been iswalpha

    PR:             264275, 274032
    Reviewed by:    kevans, eugen (previous version)
    Approved by:    re (gjb)
    Obtained from:  NetBSD

    (cherry picked from commit 3fb80f1476c7776f04ba7ef6d08397cef6abcfb0)
    (cherry picked from commit 56b09feb23d98fcd0c4aed8d4f907a5a2f6b5ea9)

 lib/libc/regex/regcomp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

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