[BUG] Emacs thinks it has a BDF font

[David Abrahams]

In http://article.gmane.org/gmane.emacs.devel/16583/ I reported that
emacs is following an execution path which attempts to draw a BDF font
even though none is in use, resulting in a crash deep in the drawing
machinery about once a day for me.  I'm unfamiliar with this part of
Emacs' display code.  Is there someone who can give me a little
guidance about what to assert, where to set a breakpoint, or something
(anything) that will help us to track this down?

Thanks,

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com