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Re: Bash2 segfaults in while: do loops


From: Mathieu Vanasse
Subject: Re: Bash2 segfaults in while: do loops
Date: Fri, 15 Sep 2006 11:41:20 -0400 (EDT)

On Fri, 15 Sep 2006, Bob Proulx wrote:

address@hidden wrote:
Bash Version: 2.05b
Patch Level: 0
...
        When trying to run a while loop, bash seldom segfaults. The
behavior is not constant. The machine is in fact an AMD 64x2, here
is a extract from dmesg:
...
address@hidden ~]$ while : ; do true ;done
Segmentation fault: 11 (core dumped)

Unfortunately that is such a non-specific error that only non-specific
responses can be given.

Obviously such a simple case should not produce a segmentation fault
and does not on most systems or there would be many reports.  I am
also running bash-2.05b from Debian Sarge/Stable on amd64 and am not
experiencing this problem.  Therefore I conjecture that this is
something specific to your particular environment, compiler, library,
or other.  Probably simply rebuilding the previous source with a fresh
environment would avoid or move this problem around.

Since you are running FreeBSD you might be able to find OS specific
help from a FreeBSD support group.  I suggest you ask there and see
what other users suggest.  Personally I think you just have a bad
build and if you can get a better build you will avoid this problem.

I did rebuild bash2 and experienced the same problem. I just upgraded to bash3, as suggested by another person in response to my bug, and the problem is now gone.

Thanks

Mathieu Vanasse
Nuage Informatique Inc.
<address@hidden>





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