For the first time in a while, I had enabled the gutter tabs. I was trying to compose a mail via VM when it crashed. I'm not exactly sure when it happened, because I went off and did something else because I thought it was swapping but xemacs was really dumping 100 MB of core. :-) Sorry, the lisp backtrace was truncated, but here's the C backtrace: (gdb) bt #0 0xfeb16870 in _libc_kill () from /usr/lib/libc.so.1 #1 0xa757c in fatal_error_signal (sig=11) at emacs.c:276 #2 <signal handler called> #3 DrawHighlight (tw=0x1c43200, child=0x2576a00, undraw=0) at xlwtabs.c:1562 #4 0x23cff8 in TabsHighlight (w=0x1c43200, event=0xffbee57c, params=0x0, num_params=0xfeefa124) at xlwtabs.c:1161 #5 0xfeec1c30 in HandleActions () from /usr/openwin/lib/libXt.so.4 #6 0xfeec0a50 in HandleSimpleState () from /usr/openwin/lib/libXt.so.4 #7 0xfeec0528 in _XtTranslateEvent () from /usr/openwin/lib/libXt.so.4 #8 0xfeec045c in XtDispatchEventToWidget () from /usr/openwin/lib/libXt.so.4 #9 0xfeebfb80 in _XtDefaultDispatcher () from /usr/openwin/lib/libXt.so.4 #10 0xfeebf810 in XtDispatchEvent () from /usr/openwin/lib/libXt.so.4 #11 0xfeec2fa0 in XtAppProcessEvent () from /usr/openwin/lib/libXt.so.4 #12 0x1febdc in emacs_Xt_event_pending_p (user_p=1) at event-Xt.c:2600 #13 0x100d4c in detect_input_pending () at event-stream.c:943 #14 0x1034b4 in Fnext_event (event=9192124, prompt=3110916) at event-stream.c:2236 #15 0x898a4 in Fcommand_loop_1 () at cmdloop.c:566 #16 0x89600 in command_loop_1 (dummy=3110916) at cmdloop.c:490 #17 0xada94 in condition_case_1 (handlers=2891776, bfun=0x8959c <command_loop_1>, barg=3110916, hfun=0x89a88 <cmd_error>, harg=3110916) at eval.c:1630 #18 0x89b98 in command_loop_2 (dummy=3110916) at cmdloop.c:252 #19 0xad5e0 in internal_catch (tag=3193172, func=0x89b4c <command_loop_2>, arg=3110916, threw=0x0) at eval.c:1305 #20 0x88e14 in initial_command_loop (load_me=564044) at cmdloop.c:301 #21 0xa9170 in xemacs_21_2_b25_sparc_sun_solaris2_7 (argc=4, argv=0xffbeee9c, envp=0xffbeeeb0, restart=0) at emacs.c:1898 #22 0xa99a8 in main (argc=4, argv=0xffbeee9c, envp=0xffbeeeb0) at emacs.c:2323 Ray