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From: Hrvoje Niksic <hniksic@srce.hr>
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Subject: Re: That `sort' bug...
Date: 29 Apr 1998 22:50:43 +0200
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Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Signaling: (wrong-type-argument number-or-marker-p nil)
>   <(nil nil)
>   sort((nil) <)
> 
> Someone discovered why this happened, but I've forgotten what the
> solution was.  Could that someone (or someone else) remind me?

`sort' modifies its first argument destructively, thus invalidating
the backtrace.  This generates the same kind of backtrace:

    (sort '(nil nil nil nil) '<)

The solution was to add `(delq nil LIST)' in an appropriate place or
two.

-- 
Hrvoje Niksic <hniksic@srce.hr> | Student at FER Zagreb, Croatia
--------------------------------+--------------------------------
Unspeakable horrors from outer space paralyze the living and
resurrect the dead!