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From: Zoltan Hidvegi <hzoli@cs.elte.hu>
Message-Id: <199611022218.XAA00325@hzoli.ppp.cs.elte.hu>
Subject: Re: Strange coredump in new zsh-3.0.1 on Sunos4.1.3
To: stucki@math.fu-berlin.de
Date: Sat, 2 Nov 1996 23:18:27 +0100 (MET)
Cc: zsh-workers@math.gatech.edu
In-Reply-To: <Pine.GSO.3.95.961102161204.26939J-100000@petzval> from "C. v. Stuckrad" at "Nov 2, 96 04:25:00 pm"
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> 
> Hi!
> 
> I yesterday tried to install the new 3.0.1 including the two patches
> from the zsh-workers-list (Subjects: '4 bugs' + 'strange behaviour of autocd')
> compiled on SunOS 4.1.3 with gcc 2.7.2.                   Then:
> 
> ONE zsh was fine (freshly logged in)
> on top of 'screen' no zhsh would survive (vers. 3.0.0 does though).
> and I get a coredump always at places like VARIABLE=`program` 
> The places divver, I cud not find a 'real' system in the dumps,
> but ALWAYS it's inside the initialisation files, and always at
> an definition of a Variable. One stacktrace of gdb follows here:

You may try this patch.  It fixes an obvious bug which was already present
in zsh-3.0.0 so it does not explain why zsh-3.0.0 worked.

Zoltan

*** Src/utils.c	1996/10/30 23:41:58	3.1.0.0
--- Src/utils.c	1996/11/02 22:15:19
***************
*** 913,919 ****
  {
      if (fd >= 0) {
  	fdtable[fd] = 0;
! 	while (!fdtable[max_zsh_fd])
  	    max_zsh_fd--;
  	if (fd == coprocin)
  	    coprocin = -1;
--- 913,919 ----
  {
      if (fd >= 0) {
  	fdtable[fd] = 0;
! 	while (max_zsh_fd > 0 && !fdtable[max_zsh_fd])
  	    max_zsh_fd--;
  	if (fd == coprocin)
  	    coprocin = -1;