> I've implemented mouse-face on mode-line.

With ruler-mode turned on, I find it very easy to crash Emacs:

M-x ruler-mode
list-buffers (C-x C-b)
Click mouse-1 back and forth between windows

Program received signal SIGSEGV, Segmentation fault.
0x08092911 in note_mode_line_or_margin_highlight (window=141874004, x=20, y=-1, 
area=ON_HEADER_LINE) at xdisp.c:21422
(gdb) p tmp_glyph->pixel_width
Cannot access memory at address 0x8763010
(gdb) p tmp_glyph
$14 = (struct glyph *) 0x8763008
(gdb) p* tmp_glyph
Cannot access memory at address 0x8763008


Nick


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