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From: "gutterinstallationarvada at gmail dot com"
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To: glibc-bugs-regex@sourceware.org
Subject: [Bug regex/25322] regex mishandles back-references inside interval
 expressions
Date: Mon, 04 Oct 2021 22:55:29 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25322

David Montoya <gutterinstallationarvada at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gutterinstallationarvada@gm
                   |                            |ail.com

--- Comment #57 from David Montoya <gutterinstallationarvada at gmail dot c=
om> ---
(In reply to Portland Junk Removal Service from comment #56)
> The glibc regular expression code mishandles regular expressions such as:
>=20
>    .*((.)\2){2}$
>=20
> as it does not backtrack enough to find a match that satisfies the
> back-references when they are used twice.
>=20
> To reproduce the problem, compile and run the attached file backrefbug.c.=
 It
> will exit with status 2, whereas the correct exit status is 0. Very unusu=
al.
>=20
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>=20
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>=20
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>=20
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https://www.gutterinstallationfortcollins.com/

--=20
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