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Date: Sat, 12 Jan 2008 18:15:44 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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Cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: csh core dumping 7.0-rc1
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Chris wrote:
> bt shows this
> 
> #0  0x00000000 in ?? ()
> #1  0x08057c65 in ?? ()
> #2  0x281f7b08 in in6addr_linklocal_allnodes () from /lib/libc.so.7
> #3  0x0808c120 in ?? ()
> #4  0x00000001 in ?? ()
> #5  0x0808c120 in ?? ()
> #6  0xbfbfed20 in ?? ()
> #7  0x00000001 in ?? ()
> #8  0xbfbfecd8 in ?? ()
> #9  0x0804bf7a in ?? ()
> #10 0x00000002 in ?? ()
> #11 0x0808c0c5 in ?? ()
> #12 0xbfbfeb48 in ?? ()
> #13 0x280988a6 in dlopen () from /libexec/ld-elf.so.1
> Previous frame inner to this frame (corrupt stack?)
> 
> Chris
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> 

That backtrace is garbage, of course :)  Try rebuilding csh and the 
libraries with CFLAGS+=-ggdb and STRIP= (i.e. set to the empty string). 
   This will allow a meaningful backtrace when it crashes.

Kris