Package: zsh
Version: 4.3.10-14
To reproduce this bug, mpc (an MPD client) is needed.
~/.zshrc must contain lines:
setopt recexact
autoload -U compinit
compinit
After adding some songs to current playlist od MPD, type
"mpc play " in zsh and press <TAB>.
Probably, segfaults like this may appear in other cases too.
Debugger session around this bug:
(gdb) run
Starting program: /usr/local/bin/zsh
hamer# mpc play
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff64fe9bb in matcheq (a=0x7ffff7ff6af8, b=0x0) at compcore.c:3070
3070 return matchstreq(a->ipre, b->ipre) &&
(gdb) list
3065
3066 /**/
3067 static int
3068 matcheq(Cmatch a, Cmatch b)
3069 {
3070 return matchstreq(a->ipre, b->ipre) &&
3071 matchstreq(a->pre, b->pre) &&
3072 matchstreq(a->ppre, b->ppre) &&
3073 matchstreq(a->psuf, b->psuf) &&
3074 matchstreq(a->suf, b->suf) &&
(gdb) print a
$1 = (Cmatch) 0x7ffff7ff6af8
(gdb) print b
$2 = (Cmatch) 0x0
(gdb) up
#1 0x00007ffff64fe395 in add_match_data (alt=0, str=0x7ffff7ff6af0 "",
orig=0x75cc10 "", line=0x7ffff7ff6970, ipre=0x7ffff7ff67b8 "",
ripre=0x0,
isuf=0x7ffff7ff67c0 "", pre=0x0, prpre=0x0, ppre=0x0, pline=0x0,
psuf=0x0,
sline=0x0, suf=0x0, flags=64, exact=1) at compcore.c:2935
2935 } else if (useexact && !matcheq(cm, ai->exactm)) {
As you can see, problem is in spelling NULL-pointer in matcheq().
For resolving ths bug, i propose use this patch:
diff -Naur zsh-4.3.10.orig/Src/Zle/compcore.c zsh-4.3.10/Src/Zle/compcore.c
--- zsh-4.3.10.orig/Src/Zle/compcore.c 2009-01-13 12:15:38.000000000 +0000
+++ zsh-4.3.10/Src/Zle/compcore.c 2010-07-27 22:58:40.726692827 +0000
@@ -2932,7 +2932,7 @@
comp_setunset(0, 0, CP_EXACTSTR, 0);
}
ai->exactm = cm;
- } else if (useexact && !matcheq(cm, ai->exactm)) {
+ } else if (useexact && (!ai->exactm || !matcheq(cm, ai->exactm))) {
ai->exact = 2;
ai->exactm = NULL;
if (incompfunc)
P.S.: I have already reported this bug to devepolers of zsh
http://sourceforge.net/tracker/?func=detail&aid=3035629&group_id=4068&atid=104068
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages zsh depends on:
ii libc6 2.11.2-2 Embedded GNU C Library:
Shared lib
ii libcap2 1:2.17-2 support for getting/setting
POSIX.
ii libncursesw5 5.7+20100313-2 shared libraries for
terminal hand
Versions of packages zsh recommends:
ii libc6 2.11.2-2 Embedded GNU C Library:
Shared lib
ii libpcre3 7.8-3 Perl 5 Compatible Regular
Expressi
Versions of packages zsh suggests:
ii zsh-doc 4.3.10-14 zsh documentation -
info/HTML form
-- no debconf information
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