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From: Lowell Kirsh <lkirsh@cs.ubc.ca>
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Subject: Re: font locking problem
Date: Mon, 10 May 2004 14:29:51 -0700
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Strange... When I change my .emacs from (require 'font-lock) to (load 
"font-lock.el") my problems go away. Why would this make a difference?

Lowell

Stefan Monnier wrote:
>>>Debugger entered--Lisp error: (wrong-type-argument integer-or-marker-p nil)
>>>goto-char(nil)
>>>eval((goto-char (match-beginning 4)))         <====================
>>>font-lock-fontify-keywords-region(1 1515 t)   <====================
> 
> [...]
> 
>>I've had a look at the code in font-lock.el, but can't make much of the
>>information in the dump.  (In particular, I can't see the connection
>>between the two lines of the dump I've marked with "<=======", which is
>>the critical bit.  Stefan, what am I missing?)
> 
> 
> font-lock.el has some `defsubst' (i.e. functions that get inlined) so the
> backtrace is "incomplete".  The call to eval is actually in
> font-lock-apply-highlight or in font-lock-fontify-anchored-keywords (both
> inlined functions called from font-lock-fontify-keywords-region).
> 
> If you load font-lock.el (i.e. the source code), the backtrace will be
> a lot more complete.
> 
> 
>         Stefan