Crash when using wheel mouse

[David Kastrup]

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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

After I visit a buffer with graphic images in it and use the wheel
mouse to scroll up and down, I get the following crash (maybe when
mouse highlighting or tooltips would get triggered) with an
up-to-date CVS Emacs:

(gdb) run
Starting program: /usr/local/tmp/emacs-build/src/emacs -geometry 80x40+0+0
 
Breakpoint 1, abort () at /home/tmp/emacs/src/emacs.c:412
412       kill (getpid (), SIGABRT);
(gdb) bt
#0  abort () at /home/tmp/emacs/src/emacs.c:412
#1  0x0809ec09 in try_window_id (w=0x8553ec0)
    at /home/tmp/emacs/src/xdisp.c:12414
#2  0x0809b9c1 in redisplay_window (window=1213546176, just_this_one_p=1)
    at /home/tmp/emacs/src/xdisp.c:10612
#3  0x080980dd in redisplay_window_1 (window=1213546176)
    at /home/tmp/emacs/src/xdisp.c:9457
#4  0x08161360 in internal_condition_case_1 (
    bfun=0x80980b0 <redisplay_window_1>, arg=1213546176, handlers=1479572244,
    hfun=0x8098060 <redisplay_window_error>) at /home/tmp/emacs/src/eval.c:1392
#5  0x0809736c in redisplay_internal (preserve_echo_area=1)
    at /home/tmp/emacs/src/xdisp.c:9083
#6  0x08190f7e in wait_reading_process_input (time_limit=30, microsecs=0,
    read_kbd=268435455, do_display=1) at /home/tmp/emacs/src/process.c:4226
#7  0x08086dad in sit_for (sec=30, usec=0, reading=1, display=1,
    initial_display=0) at /home/tmp/emacs/src/dispnew.c:6249
#8  0x0810cd66 in read_char (commandflag=1, nmaps=4, maps=0xbfffe860,
    prev_event=405651332, used_mouse_menu=0xbfffe898)
    at /home/tmp/emacs/src/keyboard.c:2698
#9  0x08112f89 in read_key_sequence (keybuf=0xbfffe9c0, bufsize=30,
    prompt=405651332, dont_downcase_last=0, can_return_switch_frame=1,
    fix_current_buffer=1) at /home/tmp/emacs/src/keyboard.c:8582
#10 0x0810a13b in command_loop_1 () at /home/tmp/emacs/src/keyboard.c:1502
---Type <return> to continue, or q <return> to quit---
#11 0x08161266 in internal_condition_case (bfun=0x8109fbc <command_loop_1>,
    handlers=405747940, hfun=0x8109bac <cmd_error>)
    at /home/tmp/emacs/src/eval.c:1351
#12 0x08109e96 in command_loop_2 () at /home/tmp/emacs/src/keyboard.c:1290
#13 0x08160e09 in internal_catch (tag=0, func=0x8109e78 <command_loop_2>,
    arg=405651332) at /home/tmp/emacs/src/eval.c:1112
#14 0x08109e4c in command_loop () at /home/tmp/emacs/src/keyboard.c:1269
#15 0x08109988 in recursive_edit_1 () at /home/tmp/emacs/src/keyboard.c:985
#16 0x08109a98 in Frecursive_edit () at /home/tmp/emacs/src/keyboard.c:1041
#17 0x081083f3 in main (argc=3, argv=0xbfffef94)
    at /home/tmp/emacs/src/emacs.c:1659
#18 0x411774a0 in __libc_start_main () from /lib/tls/libc.so.6
(gdb) xbacktrace
(gdb)

In GNU Emacs 21.3.50.6 (i686-pc-linux-gnu)
 of 2003-02-27 on lola.goethe.zz
configured using `configure '--prefix=/usr/local/emacs-21' '--with-gtk''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Recent input:
M-x r e p o r t - e m a c <tab> <return>

Recent messages:
Loading vc-cvs...done
unzipping xor-bp.tgz...done
Loading tar-mode...done
Parsing tar file...done
Loading sgml-mode...done
Reading directory /home/tmp/auctex/...done
Loading tex-info...done
Desktop loaded.
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...done

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum