Re: Crashes on draw_glyphs

[Chong Yidong]

"Juanma Barranquero" <address@hidden> writes:

> The underling bug that causes #872/#1179 is really getting annoying.
>
> Apparently I'm the only one suffering it (perhaps I'm the only one
> compiling Emacs on Windows with GCC 4.3.0), and I've been
> unsuccessfully trying to debug it for weeks. Unfortunately, as soon as
> I even add an assertion, the crash point moves. It seems like the
> thing to do is to run draw_glyphs step-by-step, but with the macros
> and all that it is quite difficult, not to mention that I know very
> little about the redisplay code and that the bug is much harder to
> catch when I compile a non-optimized build.
>
> Any help, pointer, idea, or mojo will be deeply appretiated.

Is it only the composition glyph part of the 2008-04-09 change to
w32term.c that causes the crash?  For instance, what happens if you
comment out the "else if (s->cmp) ..." part in
w32_compute_glyph_string_overhangs?