Subject: Re: bug#17411: 24.4.50; emacs_backtrace.txt

From: Eli Zaretskii <[email-masked]>
Date: Tue, 13 May 2014 22:54:08 +0300

> From: Stefan Monnier <[email-masked]>
> Cc: [email-masked], [email-masked]
> Date: Tue, 13 May 2014 15:32:13 -0400
> 
> The "eassert (length (i) > 0)" does catch this case already.  We could
> add another assert which is looser (i.e. one that would not be caught by
> a "somewhat sane interval with a non-positive length"), but I'm not sure
> how to formally define "hopelessly messed up".

You could display the values on your system in a debugger, and after
some time you should have a good idea what isn't messed up.