bug#15844: 24.3.50; Segfault in redisplay_internal

[Nathan Trapuzzano]

Eli Zaretskii <eliz@gnu.org> writes:

> Then something here doesn't compute: why is Emacs able to display this
> face in the *Faces* buffer, but not in the *Help* buffer?  Hmm...

It happens when I click the "C source code" button in the *Help* buffer,
so it could be text that it's trying to display in the buffer that it
creates for displaying the C source.