From: Jari Aalto <jari.aalto@cante.net>
To: 7227@debbugs.gnu.org
Cc: Andreas Schwab <schwab@linux-m68k.org>
Subject: bug#7227: re-search-forward goes infinite loop with dash inside []
Date: Sat, 16 Oct 2010 16:42:00 +0300 [thread overview]
Message-ID: <87eibqp847.fsf_-_@picasso.cante.net> (raw)
In-Reply-To: <1213200935.4147.62.camel@cyberelk.elk> (Tim Waugh's message of "Wed, 11 Jun 2008 17:15:35 +0100")
Andreas Schwab <schwab@linux-m68k.org> writes:
> Jari Aalto <jari.aalto@cante.net> writes:
>
>> Executing the following code causes Emacs to go into infinite loop.
>> Simply run it behind the last paren with C-x C-e
>>
>> (re-search-forward "^\\([a-z0-9.-]+\\)+[ \t]+\\([0-9]+\\) +\\([a-z].*\\)")
>
> Works fine here.
Hm. The test case needs adjustment:
;; (1) Run C-x C-e, works:
(re-search-forward "^\\([a-z0-9.-]+\\)+[ \t]+\\([0-9]+\\) +\\([a-z].*\\)")
row2 1234 rest of line
;; (2) but C-x C-e below causes a loop
(re-search-forward "^\\([a-z0-9.-]+\\)+[ \t]+\\([0-9]+\\) +\\([a-z].*\\)")
------------------------------------------------------------------------
row2 1234 rest of line
> Note that nested repetitions like \([...]+\)+ are bad in any case.
This was only a test. The anchor "^" should help, and I assume the first
'[a-z0-9.-]+' should be greedy, so it shouldn't take that long to
resolve.
Jari
next parent reply other threads:[~2010-10-16 13:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <r6eo4w45.fsf@blue.sea.net>
[not found] ` <1213200935.4147.62.camel@cyberelk.elk>
2010-10-16 13:42 ` Jari Aalto [this message]
2010-10-16 13:54 ` bug#7227: re-search-forward goes infinite loop with dash inside [] Andreas Schwab
2010-11-16 21:25 ` bug#7408: Linux patchutils: Development of the project? Jari Aalto
2010-11-16 21:59 ` Lennart Borgman
2010-11-16 22:21 ` Stefan Monnier
2010-11-17 4:47 ` jari
2010-11-17 8:25 ` Glenn Morris
2010-11-17 13:39 ` Stefan Monnier
2010-11-17 12:47 ` Štěpán Němec
2010-11-17 13:39 ` Stefan Monnier
2010-11-18 22:02 ` bug#7408: 23.2.1 dolist -- subr.el and cl-macs differ with nil-block return Jari Aalto
2010-11-21 5:45 ` Stefan Monnier
2010-11-21 9:08 ` jari
2010-11-21 17:49 ` Eli Zaretskii
2010-11-21 18:51 ` Stefan Monnier
2010-11-17 14:18 ` bug#7408: Linux patchutils: Development of the project? martin rudalics
2010-10-16 9:16 bug#7227: re-search-forward goes infinite loop with dash inside [] Jari Aalto
2010-10-16 11:27 ` Andreas Schwab
2010-10-16 11:39 ` Andreas Röhler
2010-10-22 7:55 ` bug#7227: Close bts:gnu Jari Aalto
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