completion.so segfaulting - debugging options?

completion.so segfaulting - debugging options?

[kba]

hi zsh users,

I have recently been playing a lot with zsh's completion, adding
snippets from different sources and trying a lot of things. Now I do
have a very sophisticated (read: cluttered) completion setup, thank you
very much :-) Amazing software, really.

The problem is that somewhere in all the setopts and zstyles I have
introduced a bug that leads to zsh segfaulting during completion in
certain conditions I can't reproduce properly. I try to complete a path,
the colorized list of possibilities pops up, I press another key and zsh
quits and in /var/log/messages.log a line
> [13365.361881] zsh[20379]: segfault at 0000000c eip b7c83d1d esp bfde47f0 error 6
pops up. But not always and seemingly not always under the (seemingly)
same conditions.

Now I know, that this is no good bug reporting, so I wanted to know if
there are any options/settings I might try to narrow the problem down
myself and find the cause for it. Can the completion process be
traced/logged, a la "at this point we switch to list-mode, at this point
we switch to menu completion, at this point we segfault"?

Thanks a lot for any hint
kba

Re: completion.so segfaulting - debugging options?

[Andrey Borzenkov]

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On 13 of February 2009 03:07:26 kba wrote:
[...]
> The problem is that somewhere in all the setopts and zstyles I have
> introduced a bug that leads to zsh segfaulting during completion in
> certain conditions I can't reproduce properly.
[...]
>
> Now I know, that this is no good bug reporting, so I wanted to know
> if there are any options/settings I might try to narrow the problem
> down myself and find the cause for it.

Your best bet is to find a reliable way to reproduce it and post to zsh-
workers. Also try using current CVS version, there were same crash 
fixes. But again, unless you can reproduce this bug at will, you never 
know whether this is fixed or not.

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Re: completion.so segfaulting - debugging options?

[kba]

On Fri, Feb 13, 2009 at 06:52:39AM +0300, Andrey Borzenkov wrote:
> Your best bet is to find a reliable way to reproduce it and post to zsh-
> workers. Also try using current CVS version, there were same crash 
> fixes. But again, unless you can reproduce this bug at will, you never 
> know whether this is fixed or not.

Just in case someone has the same problem and stumbles over this post:

I just read this thread [1] about zsh crashing when 'interactive' is set
as a menu-completion option. That was my problem too, apparently. I just
compiled zsh from CVS as you proposed and so far and the crash didn't
happen again (yet :D)

[1] http://bbs.archlinux.org/viewtopic.php?id=35706