GNU gdb 4.16.1
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This GDB was configured as "i386-unknown-openbsd2.7"...
Core was generated by `xemacs-21.2-b34'.
Program terminated with signal 6, Abort trap.
Reading symbols from /usr/libexec/ld.so...done.
Reading symbols from /usr/X11R6/lib/libXaw.so.6.1...done.
Reading symbols from /usr/lib/libz.so.1.3...done.
Reading symbols from /usr/X11R6/lib/libXpm.so.4.11...done.
Reading symbols from /usr/X11R6/lib/libXmu.so.6.0...done.
Reading symbols from /usr/X11R6/lib/libXt.so.6.0...done.
Reading symbols from /usr/X11R6/lib/libXext.so.6.3...done.
Reading symbols from /usr/X11R6/lib/libX11.so.6.1...done.
Reading symbols from /usr/X11R6/lib/libSM.so.6.0...done.
Reading symbols from /usr/X11R6/lib/libICE.so.6.3...done.
Reading symbols from /usr/lib/libtermcap.so.7.1...done.
Reading symbols from /usr/lib/libm.so.0.1...done.
Reading symbols from /usr/lib/libc.so.25.0...done.
#0  0x4042d17f in kill ()
(gdb) where
#0  0x4042d17f in kill ()
#1  0x45cac in fatal_error_signal (sig=6)
    at /usr/local/src/xemacs-21.2.20/src/emacs.c:514
#2  0xdfbfdfd3 in ?? ()
#3  0x4a325 in assert_failed (
    file=0xd5650 "/usr/local/src/xemacs-21.2.20/src/glyphs.c", line=590, 
    expr=0xd5854 "DOMAIN_LIVE_P (instance)")
    at /usr/local/src/xemacs-21.2.20/src/emacs.c:3114
#4  0xd58f4 in check_image_instance_structure (instance=4893952)
    at /usr/local/src/xemacs-21.2.20/src/glyphs.c:590
#5  0xde5f5 in unmap_subwindow (subwindow=4893952)
    at /usr/local/src/xemacs-21.2.20/src/glyphs.c:4425
#6  0x140b72 in redisplay_unmap_subwindows (f=0x459e00, x=4, y=41, width=576, 
    height=21, ignored_window=5092992)
    at /usr/local/src/xemacs-21.2.20/src/redisplay-output.c:1187
#7  0x141c4f in redisplay_clear_clipped_region (window=5779456, findex=9, 
    dest=0xdfbfd2a0, glyphsrc=0xdfbfd290, fullheight_p=0, 
    ignored_subwindow=5092992)
    at /usr/local/src/xemacs-21.2.20/src/redisplay-output.c:1211
#8  0x142f03 in redisplay_output_subwindow (w=0x583000, 
    image_instance=5092992, db=0xdfbfd2a0, dga=0xdfbfd290, findex=9, 
    cursor_start=0, cursor_width=0, cursor_height=0)
    at /usr/local/src/xemacs-21.2.20/src/redisplay-output.c:1248
#9  0x192712 in x_output_display_block (w=0x583000, dl=0x482000, block=0, 
    start=0, end=1, start_pixpos=4, cursor_start=0, cursor_width=0, 
    cursor_height=0) at /usr/local/src/xemacs-21.2.20/src/redisplay-x.c:472
#10 0x1432b7 in redisplay_output_display_block (w=0x583000, dl=0x482000, 
    block=0, start=0, end=1, start_pixpos=4, cursor_start=0, cursor_width=0, 
    cursor_height=0)
    at /usr/local/src/xemacs-21.2.20/src/redisplay-output.c:1152
#11 0x13ff83 in output_display_line (w=0x583000, cdla=0x417240, ddla=0x4171c0, 
    line=0, force_start=-1, force_end=-1)
    at /usr/local/src/xemacs-21.2.20/src/redisplay-output.c:799
#12 0xf291b in output_gutter (f=0x459e00, pos=TOP_GUTTER, force=0)
    at /usr/local/src/xemacs-21.2.20/src/gutter.c:318
#13 0xf3366 in update_frame_gutters (f=0x459e00)
    at /usr/local/src/xemacs-21.2.20/src/gutter.c:562
#14 0x1365c9 in redisplay_frame (f=0x459e00, preemption_check=0)
    at /usr/local/src/xemacs-21.2.20/src/redisplay.c:6384
#15 0x1367da in redisplay_device (d=0x445c00, automatic=1)
    at /usr/local/src/xemacs-21.2.20/src/redisplay.c:6467
#16 0x136b2c in redisplay_without_hooks ()
    at /usr/local/src/xemacs-21.2.20/src/redisplay.c:6556
#17 0x13d842 in redisplay ()
    at /usr/local/src/xemacs-21.2.20/src/redisplay.c:6613
#18 0x95e16 in Fnext_event (event=4711912, prompt=2316292)
    at /usr/local/src/xemacs-21.2.20/src/event-stream.c:2182
#19 0x25a8e in Fcommand_loop_1 ()
    at /usr/local/src/xemacs-21.2.20/src/cmdloop.c:570
#20 0x25e15 in command_loop_1 (dummy=2316292)
    at /usr/local/src/xemacs-21.2.20/src/cmdloop.c:494
#21 0x5560d in condition_case_1 (handlers=2316388, 
    bfun=0x25dd8 <command_loop_1>, barg=2316292, hfun=0x25e7c <cmd_error>, 
    harg=2316292) at /usr/local/src/xemacs-21.2.20/src/eval.c:1640
#22 0x25f6b in command_loop_2 (dummy=2316292)
    at /usr/local/src/xemacs-21.2.20/src/cmdloop.c:256
#23 0x55510 in internal_catch (tag=2391988, func=0x25f30 <command_loop_2>, 
    arg=2316292, threw=0x0) at /usr/local/src/xemacs-21.2.20/src/eval.c:1306
#24 0x253c7 in initial_command_loop (load_me=2316292)
    at /usr/local/src/xemacs-21.2.20/src/cmdloop.c:305
#25 0x471c3 in xemacs_21_2_b34_i386_unknown_openbsd2_7 (argc=1, 
    argv=0xdfbfd984, envp=0xdfbfd98c, restart=0)
    at /usr/local/src/xemacs-21.2.20/src/emacs.c:2146
#26 0x4a4d9 in main (argc=1, argv=0xdfbfd984, envp=0xdfbfd98c)
    at /usr/local/src/xemacs-21.2.20/src/emacs.c:2575
(gdb) quit