https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274032
Bug ID: 274032
Summary: Regression after stable/12: grep: trailing backslash
(\)
Product: Base System
Version: 13.2-STABLE
Hardware: Any
OS: Any
Status: New
Keywords: regression
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
$ sh -E
$ unset LC_ALL
$ LANG=de_DE.ISO8859-1 grep $(builtin printf '\374') /dev/null
grep: trailing backslash (\)
$ LANG=ru_RU.KOI8-R grep $(builtin printf '\301') /dev/null
grep: trailing backslash (\)
\374 is "u" with an umlaut in 8-bit ISO8859-1 locale;
\301 is cyrillic "a" in 8-bit KOI8-R locale.
The problem does not manifest with 12.4 and earlier releases that have GNU
grep.
The error occurs not in bsdgrep code (used as grep in 13+) but comes from libc:
lib/libc/regex/regerror.c
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