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Re: bash crashes after "fc"


From: Uwe Schneider
Subject: Re: bash crashes after "fc"
Date: Sat, 04 Aug 2001 21:10:41 +0200

address@hidden wrote:
> 
> Configuration Information [Automatically generated, do not change]:
> Machine: i386
> OS: linux
> Compiler: gcc -I/usr/src/packages/BUILD/bash-2.05
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' 
> -DCONF_OSTYPE='linux' -DCONF_MACHTYPE='i386-suse-linux' -DCONF_VENDOR='suse' 
> -DSHELL -DHAVE_CONFIG_H  -D_FILE_OFFSET_BITS=64  -I. -I/usr/include -I. 
> -I./include -I./lib -I/usr/include -O2 -m486 -mcpu=i486 -march=i486 
> -D_GNU_SOURCE -Wall -pipe
> uname output: Linux majestix 2.4.4-4GB #1 Wed May 16 00:37:55 GMT 2001 i586 
> unknown
> Machine Type: i386-suse-linux
> 
> Bash Version: 2.05
> Patch Level: 0
> Release Status: release
> 
> Description:
>         bash crashes after "fc" with SEGV.
> 
> Repeat-By:
> 
> address@hidden ~ >bash
> address@hidden ~ >echo $HOME
> /home/pi
> address@hidden ~ >fc
> echo $HOME
> /home/pi
> Speicherzugriffsfehler (SEGV)

Electric fence tells me that there is a free too often in
builtins/fc.def at line 397. Maybe this has something to do with the
call to 

  add_unwind_protect ((Function *)xfree,
fn);                                   

in line 632, but I have not understood the code thoroughly. 

BTW. Can anybody explain me why the bash code has implemented xmalloc(),
xrealloc and xfree() three times and uses plain malloc/free in addition?

Best regards

Uwe
-- 
Uwe Schneider       | Telefon +49 7251 / 82587
Karlsdorfer Str. 31 | Mail    address@hidden
DE-76646 Bruchsal   | http://www.richard-schneider.de/uwe
Linux - OS al dente!



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