GNU bug report logs - #62605
`[\d]` does not work with PCRE

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Tukusej’s Sirs <tukusejssirs <at> protonmail.com>
To: "bug-grep <at> gnu.org" <bug-grep <at> gnu.org>
Subject: `[\d]` does not work with PCRE
Date: Sat, 01 Apr 2023 21:32:24 +0000

[Message part 1 (text/plain, inline)]

Hi, everyone,

I have just noticed that `grep -P '[\d]' <<< 'asdf 1234 asdf'` does not work, while `grep -P '[0-9]' <<< 'asdf 1234 asdf'` works as expected. When `\d` is used outside of square brackets, it works as expected.
I have no idea why `[\d]` does not work, but after I open this SO question, it seems to be a problem at least in `grep <at> 3.10` or `3.7+` (excluding `3.7`).
Note that I use Arch Linux and I have installed `grep` from the official repositories.
`grep` version I currently use:

    grep (GNU grep) 3.10
    Copyright (C) 2023 Free Software Foundation, Inc.
    License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
    This is free software: you are free to change and redistribute it.
    There is NO WARRANTY, to the extent permitted by law.
    

    Written by Mike Haertel and others; see
    <https://git.savannah.gnu.org/cgit/grep.git/tree/AUTHORS>.


How this helps someone to find the bug in the code. :)

Tukusej’s Sirs

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Message #10 received at 62605 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Tukusej’s Sirs <tukusejssirs <at> protonmail.com>
Cc: 62605 <at> debbugs.gnu.org
Subject: Re: bug#62605: `[\d]` does not work with PCRE
Date: Sun, 2 Apr 2023 11:38:07 -0700

Thanks for reporting the bug with [\d]. This is a known bug and we're 
working on it; please see:

https://bugs.gnu.org/62552

I merged the two bug reports.

Message #13 received at 62605 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Tukusej’s Sirs <tukusejssirs <at> protonmail.com>
Cc: 62605 <at> debbugs.gnu.org
Subject: Re: bug#62605: `[\d]` does not work with PCRE
Date: Sun, 2 Apr 2023 12:13:31 -0700

Also, please see the recent thread about this in the grep-devel mailing 
list, e.g.:

https://lists.gnu.org/r/grep-devel/2023-04/msg00004.html

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