bug#60621: closed (grep -P does not set PCRE2_UCP)

[GNU bug Tracking System]

Your message dated Sat, 7 Jan 2023 18:28:49 -0800
with message-id 
<CA+8g5KFxt_SKL=tMPbRMnZhojv522x--OY-iq4k0SQpuTcfuQQ@mail.gmail.com>
and subject line Re: bug#60618: unicode characters are not identified as such 
for \w and \b with -P
has caused the debbugs.gnu.org bug report #60618,
regarding grep -P does not set PCRE2_UCP
to be marked as done.

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60618: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=60618
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> --- Begin Message ---
>
>
>
> Subject: 
>
> grep -P does not set PCRE2_UCP
>
>
>
>
> Date: 
>
> Fri, 6 Jan 2023 21:41:53 +0100
>
>
>
>
> Hi
>
> Using grep -P for boundary matches yields incorrect results with
> non-ASCII letters:
>
> $ echo 'Öst' | grep -P '\bs'
> Öst
>
> The output should be nothing in this case, and the culprit seems to be
> this line in pcresearch.c:
>
>       flags |= PCRE2_UTF;
>
> If the PCRE2_UCP flag is added according to this, the program behaves
> correctly:
>
>       flags |= PCRE2_UTF|PCRE2_UCP;
>
> The pcre2grep test program in the pcre2 has the same problem, and I
> filed an issue there too:
>
> https://github.com/PCRE2Project/pcre2/issues/185
>
> A Twitter discussion with more examples:
>
> https://twitter.com/gro_tsen/status/1610972356972875777
>
> Kind regards
> -- 
> Karl Pettersson
> Uppsala, Sverige/Sweden
>
> https://static-dust.klpn.se/
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#60618: unicode characters are not identified as such for \w and \b with -P
>
>
>
>
> Date: 
>
> Sat, 7 Jan 2023 18:28:49 -0800
>
>
>
>
> On Fri, Jan 6, 2023 at 11:37 PM Jim Meyering <jim@meyering.net> wrote:
> > On Fri, Jan 6, 2023 at 11:28 PM Jim Meyering <jim@meyering.net> wrote:
> > > On Fri, Jan 6, 2023 at 7:49 PM Carlo Arenas <carenas@gmail.com> wrote:
> > > > Reported to PCRE[1] with mention of GNU grep being also affected.
> > > >
> > > > [1] https://github.com/PCRE2Project/pcre2/issues/185
> > >
> > > Yikes. This is a big deal.
> > > Thank you for the patch and added test.
>
> I've also added the new names to THANKS.in and pushed this:
> https://git.savannah.gnu.org/cgit/grep.git/commit/?id=5e3b760f65f13856e5717e5b9d935f5b4a615be3
>
>
> --- End Message ---