From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-27824-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 8583 invoked by alias); 24 Mar 2010 18:28:17 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 27824
Received: (qmail 29144 invoked from network); 24 Mar 2010 18:28:15 -0000
X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VERIFIED autolearn=ham version=3.2.5
Received-SPF: pass (ns1.primenet.com.au: SPF record at _spf.google.com designates 209.85.220.212 as permitted sender)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:received:received:received:from:to:subject:date
         :message-id:user-agent:mime-version:content-type;
        bh=ykq5DESAneiEqBb9JI8mPMjD5E3IsFOTEsIoU3nlL9w=;
        b=KtZAb5HUpaLj9pb5aWzfRKCCO7jZIl/ezrWPTnBsBfhQKd9+72XGCWSYsJ6fZvqDUf
         0x99+7bL3sgjnS9GLBdHSafiy/QOZDHm65gF4V98LJ/0KD5D/RfIFPUwXiC/KhuzWYN1
         D3MsJjCVEQWjttOpCL5RM8vOw83xKDaRGELOk=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=from:to:subject:date:message-id:user-agent:mime-version
         :content-type;
        b=H7UnVII02xUjw+XeJVVh3SWKCoHYR31PrkbwXJm9ZObzOi8fB1W4rn0C53/TDZXDsF
         DcrGGeW52d/x6bMCpmwgf9KpcU/PKcXapr7gNZ6hVG/ST9b4NB5E4dRCtIjfEF2SWJPk
         2J8UqXZ8bMORlh3Cm3Wz+UwBtS19GgdiyRHf0=
From: Christian Neukirchen <chneukirchen@gmail.com>
To: zsh-workers@zsh.org
Subject: Infinite loop in parsing <()?
Date: Wed, 24 Mar 2010 19:22:10 +0100
Message-ID: <87ljdhzijx.fsf@gmail.com>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

Hi,

% uname -a
Linux zorya 2.6.32-ARCH #1 SMP PREEMPT Tue Feb 23 19:43:46 CET 2010 x86_64 Genuine Intel(R) CPU U4100 @ 1.30GHz GenuineIntel GNU/Linux

% echo $ZSH_VERSION $ZSH_PATCHLEVEL 
4.3.10 1.4705

% cat <(echo foo | sort)
# 100% CPU usage
^C
(gdb) bt
#0  0x00007ffff74290ae in memcpy () from /lib/libc.so.6
#1  0x000000000044f514 in realloc ()
#2  0x000000000044f7a9 in zrealloc ()
#3  0x0000000000465ec4 in ?? ()
#4  0x000000000046713a in ?? ()
#5  0x0000000000467ebe in ?? ()
#6  0x0000000000468033 in ?? ()
#7  0x00000000004680cc in ?? ()
#8  0x000000000046816b in ?? ()
#9  0x0000000000468289 in ?? ()
#10 0x0000000000469634 in parse_list ()
#11 0x00000000004252f1 in parse_string ()
#12 0x00000000004255d6 in ?? ()
#13 0x000000000042b96f in getproc ()
#14 0x0000000000477e2c in ?? ()
#15 0x000000000047c2b5 in prefork ()
#16 0x0000000000426b47 in ?? ()
#17 0x0000000000428ed6 in ?? ()
#18 0x0000000000429286 in ?? ()
#19 0x000000000042a577 in execlist ()
#20 0x000000000042a7e3 in execode ()
#21 0x000000000043ce48 in loop ()
#22 0x000000000043dc8e in zsh_main ()
#23 0x00007ffff73c7b6d in __libc_start_main () from /lib/libc.so.6
#24 0x000000000040d8a9 in _start ()

For mysterious reasons,
% cat <(echo foo)
% cat <(echo foo | uname)
% cat <(echo foo | wc)
all work fine.

-- 
Christian Neukirchen  <chneukirchen@gmail.com>  http://chneukirchen.org