Bug in zsh 3.0.8

Bug in zsh 3.0.8

[Nadav Har'El]

I found the following bug in zsh 3.0.8 (I don't know if it exists in the
latest beta version, since i don't have it):

/home/nyh$ cat /tmp/z.z
echo $ZSH_VERSION
let 'a[3]=2'
let 'a[3]=2'
/home/nyh$ zsh /tmp/z.z
3.0.8
zsh: segmentation fault  zsh /tmp/z.z


I don't know what's wrong: had an array already been defined, stuff like
let 'a[3]++' works. So why can't let 'a[3]=2' work? Strangely, the first
let command doesn't crash (but it doesn't set a[3]!), and only the second
one crashes zsh.

Thanks,
	Nadav.


-- 
Nadav Har'El                        |   Wednesday, Dec 13 2000, 16 Kislev 5761
nyh@math.technion.ac.il             |-----------------------------------------
Phone: +972-53-245868, ICQ 13349191 |If Windows is the answer, you didn't
http://nadav.harel.org.il           |understand the question.

Re: Bug in zsh 3.0.8

[Bart Schaefer]

On Dec 13,  4:14pm, Nadav Har'El wrote:
} 
} /home/nyh$ cat /tmp/z.z
} echo $ZSH_VERSION
} let 'a[3]=2'
} let 'a[3]=2'
} /home/nyh$ zsh /tmp/z.z
} 3.0.8
} zsh: segmentation fault  zsh /tmp/z.z

I can't reproduce the crash here.  Further, a[3] gets set to 2 for me.

Does it happen to you with "zsh -f /tmp/z.z"?  If not, we need to know
what your startup files are changing.

Can you generate a stack trace, e.g. with gdb or dbx, and send it to us?

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net   

Re: Bug in zsh 3.0.8

[Bart Schaefer]

On Dec 13,  4:14pm, Nadav Har'El wrote:
}
} /home/nyh$ cat /tmp/z.z
} echo $ZSH_VERSION
} let 'a[3]=2'
} let 'a[3]=2'
} /home/nyh$ zsh /tmp/z.z
} 3.0.8
} zsh: segmentation fault  zsh /tmp/z.z

My mind is slipping.  There's a patch for this bug on SourceForge; go to

http://sourceforge.net/patch/?group_id=4068

for the complete list of 3.0.8 patches.  The specific patch in question is:

http://sourceforge.net/patch/?func=detailpatch&patch_id=100721&group_id=4068

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net   

Re: Bug in zsh 3.0.8

[Nadav Har'El]

On Wed, Dec 13, 2000, Bart Schaefer wrote about "Re: Bug in zsh 3.0.8":
> On Dec 13,  4:14pm, Nadav Har'El wrote:
> } 
> } /home/nyh$ cat /tmp/z.z
> } echo $ZSH_VERSION
> } let 'a[3]=2'
> } let 'a[3]=2'
> } /home/nyh$ zsh /tmp/z.z
> } 3.0.8
> } zsh: segmentation fault  zsh /tmp/z.z
> 
> I can't reproduce the crash here.  Further, a[3] gets set to 2 for me.
> 
> Does it happen to you with "zsh -f /tmp/z.z"?  If not, we need to know
> what your startup files are changing.

It also happens with zsh -f. My system is Redhat 7.0, with the vanilla zsh:
/home/nyh$ uname -a
Linux tigger.haifa.radware.co.il 2.2.16-22 #2 Wed Oct 4 10:49:01 IDT 2000 i686 unknown
/home/nyh$ rpm -qf /bin/zsh
zsh-3.0.8-3


> 
> Can you generate a stack trace, e.g. with gdb or dbx, and send it to us?

I'll try to compile zsh from sources to get a good stack-trace. So far I
only managed to get it from a non-stripped but non-"-g" binary I had lying
around, and got the following:
(gdb) r -f /tmp/z.z
Starting program: /usr/local/bin/zsh -f /tmp/z.z
3.0.8

Program received signal SIGSEGV, Segmentation fault.
0x806e0a5 in setiparam ()
(gdb) where
#0  0x806e0a5 in setiparam ()
#1  0x806a05d in setvar ()
#2  0x806b45f in op ()
#3  0x806b95f in mathparse ()
#4  0x806b60d in mathevall ()
#5  0x806b72f in matheval ()
#6  0x8054129 in bin_let ()
#7  0x804aa23 in execbuiltin ()
#8  0x80588a5 in execcmd ()
#9  0x8056930 in execpline2 ()
#10 0x80560d6 in execpline ()
#11 0x8055d33 in execlist ()
#12 0x8062f6c in loop ()
#13 0x8062ddc in main ()
#14 0x4005ae51 in __libc_start_main (main=0x8062cc0 <main>, argc=3, 
    ubp_av=0xbffffa44, init=0x8049ad4 <_init>, fini=0x809014c <_fini>, 
    rtld_fini=0x4000e264 <_dl_fini>, stack_end=0xbffffa3c)
    at ../sysdeps/generic/libc-start.c:111

If this is not enough information, I can compile it again with -g and
send you more information (and/or try to debug it myself).

Thanks!
	Nadav.

-- 
Nadav Har'El                        |   Wednesday, Dec 13 2000, 16 Kislev 5761
nyh@math.technion.ac.il             |-----------------------------------------
Phone: +972-53-245868, ICQ 13349191 |Computers are like air conditioners.
http://nadav.harel.org.il           |Both stop working if you open windows.

Re: Bug in zsh 3.0.8

[Nadav Har'El]

On Wed, Dec 13, 2000, Bart Schaefer wrote about "Re: Bug in zsh 3.0.8":
> My mind is slipping.  There's a patch for this bug on SourceForge; go to
> 
> http://sourceforge.net/patch/?group_id=4068

Thanks. Sorry for the mess...

-- 
Nadav Har'El                        |   Wednesday, Dec 13 2000, 16 Kislev 5761
nyh@math.technion.ac.il             |-----------------------------------------
Phone: +972-53-245868, ICQ 13349191 |The person who knows how to laugh at
http://nadav.harel.org.il           |himself will never cease to be amused.