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/
