crash while scrolling

[Tak Ota]

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Please write in English, because the Emacs maintainers do not have
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In GNU Emacs 21.1.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2001-11-29 on tak_linux
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

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

Emacs crashed while scroll-up and scroll-down a elisp file buffer
window quickly and repetitively.  Here is the information from a core.
It is easily reproducible.

(gdb) where
#0  0x40329a01 in __kill () from /lib/i686/libc.so.6
#1  0x080ce974 in fatal_error_signal (sig=11) at emacs.c:354
#2  <signal handler called>
#3  0x0805196a in fill_up_glyph_row_area_with_spaces (row=0x887abd8, area=0)
    at dispnew.c:2854
#4  0x08051912 in fill_up_glyph_row_with_spaces (row=0x887abd8)
    at dispnew.c:2834
#5  0x08051830 in build_frame_matrix_from_leaf_window (frame_matrix=0x83ada10, 
    w=0x8890be0) at dispnew.c:2750
#6  0x08051726 in build_frame_matrix_from_window_tree (matrix=0x83ada10, 
    w=0x8890be0) at dispnew.c:2690
#7  0x080516c9 in build_frame_matrix (f=0x827f2f0) at dispnew.c:2670
#8  0x08052d5b in update_frame (f=0x827f2f0, force_p=0, inhibit_hairy_id_p=0)
    at dispnew.c:3850
#9  0x0806689f in redisplay_internal (preserve_echo_area=0) at xdisp.c:8868
#10 0x080656a5 in redisplay () at xdisp.c:8231
#11 0x080d2649 in read_char (commandflag=1, nmaps=3, maps=0xbffff590, 
    prev_event=405173724, used_mouse_menu=0xbffff5c8) at keyboard.c:2272
#12 0x080d910c in read_key_sequence (keybuf=0xbffff6f0, bufsize=30, 
    prompt=405173724, dont_downcase_last=0, can_return_switch_frame=1, 
    fix_current_buffer=1) at keyboard.c:8180
#13 0x080d120f in command_loop_1 () at keyboard.c:1440
#14 0x0812121a in internal_condition_case (bfun=0x80d0f10 <command_loop_1>, 
    handlers=405270044, hfun=0x80d0b50 <cmd_error>) at eval.c:1267
#15 0x080d0df2 in command_loop_2 () at keyboard.c:1245
#16 0x08120ddb in internal_catch (tag=405231652, 
    func=0x80d0dd4 <command_loop_2>, arg=405173724) at eval.c:1030
#17 0x080d0d80 in command_loop () at keyboard.c:1224
#18 0x080d0932 in recursive_edit_1 () at keyboard.c:950
#19 0x080d0a4b in Frecursive_edit () at keyboard.c:1006
#20 0x080cfa53 in main (argc=2, argv=0xbffffcb4, envp=0xbffffcc0)
    at emacs.c:1547
#21 0x40317507 in __libc_start_main (main=0x80cee74 <main>, argc=2, 
    ubp_av=0xbffffcb4, init=0x804d860 <_init>, fini=0x8162c60 <_fini>, 
    rtld_fini=0x4000dc14 <_dl_fini>, stack_end=0xbffffcac)
    at ../sysdeps/generic/libc-start.c:129



Recent input:
h s [ a r e a ] RET p SPC r o w - > u s e d [ a r e 
a ] RET p SPC e n d RET w h e r e RET C-o 1 C-w C-w 
C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w 
C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w C-w 
C-w C-w C-w C-w C-w C-w ESC x e m a SPC v e SPC RET 
ESC x e m C-h C-h r e p o r SPC SPC SPC RET

Recent messages:
~/emacs 
Completing file name...
Partially completed
~/emacs/emacs-21.1 
~/emacs/emacs-21.1/src 
Loading cc-mode...done
Mark set
Line 347
GNU Emacs 21.1.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of 
2001-11-29 on tak_linux
Loading emacsbug...done