Follow-up Comment #7, bug #28275 (project grep):
> Regarding Perl mode, that's unfortunately a bug in PCRE, not grep.
pcregrep that comes with PCRE works fine if the -u switch is specified.
Philip Hazel suggested calling pcre_compile() with PCRE_UTF8 flag set, when
UTF-8 is involved. I tried patching grep, but ran into some Gentoo-specific
difficulties.
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