bug#1105: Looping in redisplay due to font problem

[Kenichi Handa]

In article <87y711r87e.fsf@cyd.mit.edu>, Chong Yidong <cyd@stupidchicken.com> 
writes:

> Yes, it always seems to stop at this place.  Here's `bt full' and a
> debugging session.  I don't see anything wrong OTOH, and am unsure about
> what to look for.  Stepping forward in gdb doesn't work because the
> program is stopped inside `select'.  Any suggestions?

> #0  0x00007f6dd0fe5433 in select () from /lib/libc.so.6
> #1  0x00007f6dcf0422b6 in ?? () from /usr/lib/libxcb.so.1
> #2  0x00007f6dcf0428eb in ?? () from /usr/lib/libxcb.so.1
> #3  0x00007f6dcf043050 in xcb_send_request () from /usr/lib/libxcb.so.1
> #4  0x00007f6dd1943f1a in _XPutXCBBuffer () from /usr/lib/libX11.so.6
> #5  0x00007f6dd1944267 in ?? () from /usr/lib/libX11.so.6
> #6  0x00007f6dd19370bd in XSetClipMask () from /usr/lib/libX11.so.6
> #7  0x00000000004e426d in x_draw_glyph_string (s=0x7fffdd7a95e0)
>     at xterm.c:2883
>         relief_drawn_p = 0
> #8  0x00000000004617cc in draw_glyphs (w=0x1cd5ad0, x=72, row=0x1f727d0, 
>     area=TEXT_AREA, start=7, end=8, hl=DRAW_NORMAL_TEXT, overlaps=0)
>     at xdisp.c:20504

Please try to comment out all calls of XSetClipMask in
x_draw_glyph_string, and check if Emacs loops in redisplay.

---
Kenichi Handa
handa@ni.aist.go.jp