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From: "ahmedsayeed1982 at yahoo dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs-regex@sourceware.org
Subject: [Bug regex/25322] regex mishandles back-references inside interval expressions
Date: Tue, 25 May 2021 19:52:12 +0000 [thread overview]
Message-ID: <bug-25322-132-1nN5SplVGd@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-25322-132@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=25322
Ahmed Sayeed <ahmedsayeed1982 at yahoo dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ahmedsayeed1982 at yahoo dot com
--- Comment #1 from Ahmed Sayeed <ahmedsayeed1982 at yahoo dot com> ---
The glibc regular expression code mishandles regular expressions such as:
.*((.)\2){2}$
as it does not backtrack enough to find a match that satisfies the
back-references when they are used twice.
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.
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next parent reply other threads:[~2021-05-25 19:52 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
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