Abort when scrolling around images

[David Kastrup]

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

Hello Kim,

when scrolling around a buffer with images, I managed to trigger the
following.  Unfortunately I was too stupid to take a screen shot
before switching to the debugger window, and you can imagine that the
aborted Emacs refused to redraw...

But maybe this is enough of a clue.  Most recent CVS version (half an
hour old or so).

I'll keep the dead process around for a while, but probably not longer
for more than a few hours.  But it would probably be reasonably easy
to generate a new one: it did not take that much moving around before
the crash occured.

(gdb) backtrace
#0  0x006e57e2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x00729c46 in kill () from /lib/tls/libc.so.6
#2  0x081122d2 in abort () at /home/tmp/emacs/src/emacs.c:456
#3  0x080997b0 in move_it_vertically_backward (it=0x218f, dy=0)
    at /home/tmp/emacs/src/xdisp.c:6370
#4  0x080a58cf in redisplay_window (window=150497548, just_this_one_p=1)
    at /home/tmp/emacs/src/xdisp.c:12277
#5  0x080a8261 in redisplay_window_1 (window=150497548)
    at /home/tmp/emacs/src/xdisp.c:10852
#6  0x08170044 in internal_condition_case_1 (
    bfun=0x80a8234 <redisplay_window_1>, arg=150497548, handlers=137517269, 
    hfun=0x809d940 <redisplay_window_error>) at /home/tmp/emacs/src/eval.c:1426
#7  0x080a948f in redisplay_internal (preserve_echo_area=0)
    at /home/tmp/emacs/src/xdisp.c:10474
#8  0x080a9d36 in redisplay_preserve_echo_area (from_where=2)
    at /home/tmp/emacs/src/xdisp.c:10633
#9  0x08089f3e in sit_for (sec=0, usec=0, reading=0, display=1, 
    initial_display=1) at /home/tmp/emacs/src/dispnew.c:6358
#10 0x08089fd3 in Fsit_for (seconds=0, milliseconds=0, nodisp=137490449)
    at /home/tmp/emacs/src/dispnew.c:6421
#11 0x08171c01 in Ffuncall (nargs=2, args=0xbfed8310)
    at /home/tmp/emacs/src/eval.c:2783
#12 0x0819a98f in Fbyte_code (bytestr=138060153, vector=1, 
---Type <return> to continue, or q <return> to quit---
    maxdepth=-1074953328) at /home/tmp/emacs/src/bytecode.c:686
#13 0x08171743 in funcall_lambda (fun=136607676, nargs=4, 
    arg_vector=0xbfed84d4) at /home/tmp/emacs/src/eval.c:2967
#14 0x08171aa2 in Ffuncall (nargs=5, args=0xbfed84d0)
    at /home/tmp/emacs/src/eval.c:2837
#15 0x0819a98f in Fbyte_code (bytestr=137724905, vector=4, 
    maxdepth=-1074953008) at /home/tmp/emacs/src/bytecode.c:686
#16 0x08171240 in Feval (form=137218520) at /home/tmp/emacs/src/eval.c:2130
#17 0x0817320a in Fcondition_case (args=137490449)
    at /home/tmp/emacs/src/eval.c:1332
#18 0x08199aad in Fbyte_code (bytestr=137724905, vector=143, 
    maxdepth=-1074952368) at /home/tmp/emacs/src/bytecode.c:864
#19 0x08171743 in funcall_lambda (fun=136606852, nargs=1, 
    arg_vector=0xbfed88f4) at /home/tmp/emacs/src/eval.c:2967
#20 0x08171aa2 in Ffuncall (nargs=2, args=0xbfed88f0)
    at /home/tmp/emacs/src/eval.c:2837
#21 0x0816e938 in Fcall_interactively (function=137648121, 
    record_flag=137490449, keys=137547324) at /home/tmp/emacs/src/callint.c:877
#22 0x081194cf in Fcommand_execute (cmd=137648121, record_flag=137490449, 
    keys=137490449, special=137490449) at /home/tmp/emacs/src/keyboard.c:9697
#23 0x08120155 in command_loop_1 () at /home/tmp/emacs/src/keyboard.c:1792
#24 0x0816ff52 in internal_condition_case (bfun=0x811fdfc <command_loop_1>, 
    handlers=137551441, hfun=0x8119ddc <cmd_error>)
---Type <return> to continue, or q <return> to quit---
    at /home/tmp/emacs/src/eval.c:1385
#25 0x08114886 in command_loop_2 () at /home/tmp/emacs/src/keyboard.c:1319
#26 0x0816fe61 in internal_catch (tag=0, func=0x8114868 <command_loop_2>, 
    arg=137490449) at /home/tmp/emacs/src/eval.c:1144
#27 0x08114695 in command_loop () at /home/tmp/emacs/src/keyboard.c:1298
#28 0x0811472f in recursive_edit_1 () at /home/tmp/emacs/src/keyboard.c:991
#29 0x0811482a in Frecursive_edit () at /home/tmp/emacs/src/keyboard.c:1052
#30 0x08113bb1 in main (argc=1, argv=0xbfed9124)
    at /home/tmp/emacs/src/emacs.c:1766
(gdb) xbacktrace
"sit-for"
"line-move"
"byte-code"
"previous-line"
"call-interactively"
(gdb) 


In GNU Emacs 22.0.50.4 (i686-pc-linux-gnu, GTK+ Version 2.6.2)
 of 2005-02-20 on lola.goethe.zz
Distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure '--prefix=/usr/local/emacs-21' '--with-gtk' 
'--without-toolkit-scroll-bars''

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

Major mode: Change Log

Minor modes in effect:
  TeX-PDF-mode: t
  auto-compression-mode: t
  desktop-save-mode: t
  file-name-shadow-mode: t
  iswitchb-mode: t
  minibuffer-electric-default-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  line-number-mode: t
  transient-mark-mode: identity

Recent input:
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1> 
M-x r e p o r t - e m a c s - b u <tab> <return>

Recent messages:
Applying style hooks... done
Loading cc-mode...done
Loading info...
Loading tool-bar...done
Loading info...done
unzipping latex.info.gz...done
unzipping autoconf.info.gz...done
Desktop: File "/home/tmp/emacs/admin/.cvsignore" no longer exists.
Desktop: 26 buffers restored, 1 failed to restore.
Loading emacsbug...done

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum