bug#18094: 24.4.50; emacs_backtrace.txt

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 23 Jul 2014 22:39:16 -0700 (PDT)
> From: Drew Adams <drew.adams@oracle.com>
> 
> Backtrace:
> 01201baf
> 01201c20
> 010f4223
> 0116762f
> 010eea46
> 01065a4e
> 01062e45
> 01063633
> 01062197
> 01061d32
> 0105044a
> 01047acd
> 0118283e
> 01047a5a
> 01046a90
> 01044b0d
> 010fa886
> 01107d88
> 010f8355
> 0118272b
> 010f7c8a
> 01181cd8
> 010f7c42
> 010f73d8
> 010f7594
> 010f5724
> 010010f9
> 76993386
> 771d9f6e
> 771d9f41
> 
> 
> 
> 
> In GNU Emacs 24.4.50.1 (i686-pc-mingw32)
>  of 2014-06-28 on ODIEONE
> Bzr revision: 117431 rgm@gnu.org-20140628015517-eku6hj8mpgcvfnso

Translation:

  w32_backtrace at c:\Devel\emacs\repo\binary\src/w32fns.c:8490
  emacs_abort at c:\Devel\emacs\repo\binary\src/w32fns.c:8522
  terminate_due_to_signal at c:\Devel\emacs\repo\binary\src/emacs.c:383
  die at c:\Devel\emacs\repo\binary\src/alloc.c:7044
  face_at_string_position at c:\Devel\emacs\repo\binary\src/xfaces.c:6163
  display_string at c:\Devel\emacs\repo\binary\src/xdisp.c:23098
  display_mode_element at c:\Devel\emacs\repo\binary\src/xdisp.c:21850
  display_mode_element at c:\Devel\emacs\repo\binary\src/xdisp.c:22022
  display_mode_line at c:\Devel\emacs\repo\binary\src/xdisp.c:21539
  display_mode_lines at c:\Devel\emacs\repo\binary\src/xdisp.c:21482
  redisplay_window at c:\Devel\emacs\repo\binary\src/xdisp.c:16628
  redisplay_window_0 at c:\Devel\emacs\repo\binary\src/xdisp.c:14225
  internal_condition_case_1 at c:\Devel\emacs\repo\binary\src/eval.c:1373
  redisplay_windows at c:\Devel\emacs\repo\binary\src/xdisp.c:14205
  redisplay_internal at c:\Devel\emacs\repo\binary\src/xdisp.c:13804
  redisplay at c:\Devel\emacs\repo\binary\src/xdisp.c:13090
  read_char at c:\Devel\emacs\repo\binary\src/keyboard.c:2561
  read_key_sequence at c:\Devel\emacs\repo\binary\src/keyboard.c:9085
  command_loop_1 at c:\Devel\emacs\repo\binary\src/keyboard.c:1439
  internal_condition_case at c:\Devel\emacs\repo\binary\src/eval.c:1349
  command_loop_2 at c:\Devel\emacs\repo\binary\src/keyboard.c:1170
  internal_catch at c:\Devel\emacs\repo\binary\src/eval.c:1113
  command_loop at c:\Devel\emacs\repo\binary\src/keyboard.c:1149
  recursive_edit_1 at c:\Devel\emacs\repo\binary\src/keyboard.c:770
  Frecursive_edit at c:\Devel\emacs\repo\binary\src/keyboard.c:841
  main at c:\Devel\emacs\repo\binary\src/emacs.c:1656

This makes no sense to me.  The crash is here:

  int
  face_at_string_position (struct window *w, Lisp_Object string,
			   ptrdiff_t pos, ptrdiff_t bufpos,
			   ptrdiff_t *endptr, enum face_id base_face_id,
			   int mouse_p)
  {
    [...]
    base_face = FACE_FROM_ID (f, base_face_id);
    eassert (base_face);  <<<<<<<<<<<<<<<<<<<<<<<<<<

The argument base_face_id comes from the current mode line face, which
must be a valid face.

What in the world are you doing with your mode line format??