CORE on close-buffer

Hi! XEmacs 21.2 (beta36) "Notus" [Lucid] (i386-unknown-freebsd3.3) of Tue Oct 10 2000 on lamia.LF.net I was copying a section from a file-buffer into a Gnus article. After closing the file-buffer, xemacs closed on me... with the following C-stack, no Lisp-backtrace besides the abort-trap I saw the same behaviour some days ago. I guess, it's a GC issue, because of (gdb) up 5 #5 0x80c1499 in error (fmt=0x8298960 "Marker does not point #anywhere") at eval.c:2052 2052 RETURN_UNGCPRO (signal_1 (error_symbol, data)); But perhaps the corrupt marker is the culprit in the first place. #0 0x184e23d0 in kill () from /usr/lib/libc.so.3 #1 0x80ba5c3 in fatal_error_signal (sig=6) at emacs.c:531 #2 0xbfbfdfdc in ?? () #3 0x80bd55a in assert_failed (file=0x826bbcf "eval.c", line=1885, expr=0x826bbc7 "abort()") at emacs.c:3189 #4 0x80bffe5 in signal_1 (sig=137410660, data=156630796) at #eval.c:1885 #5 0x80c1499 in error (fmt=0x8298960 "Marker does not point #anywhere") at eval.c:2052 #6 0x817925e in marker_position (marker=158115548) at marker.c:348 #7 0x819217c in redisplay_window (window=158399488, skip_selected=0) at redisplay.c:5897 #8 0x8192eb0 in redisplay_frame (f=0x8e98400, preemption_check=0) at redisplay.c:6394 #9 0x8193093 in redisplay_device (d=0x9470d00, automatic=1) at redisplay.c:6468 #10 0x8193409 in redisplay_without_hooks () at redisplay.c:6557 #11 0x819b3ce in redisplay () at redisplay.c:6614 #12 0x80fdfc0 in Fnext_event (event=148261680, prompt=137410564) at event-stream.c:2206 #13 0x80a230f in Fcommand_loop_1 () at cmdloop.c:570 #14 0x80a25c2 in command_loop_1 (dummy=137410564) at cmdloop.c:494 #15 0x80c993a in condition_case_1 (handlers=137410660, bfun=0x80a2584 <command_loop_1>, barg=137410564, hfun=0x80a2634 <cmd_error>, harg=137410564) at eval.c:1651 #16 0x80a2727 in command_loop_2 (dummy=137410564) at cmdloop.c:256 #17 0x80c983c in internal_catch (tag=137494628, func=0x80a26ec <command_loop_2>, arg=137410564, threw=0x0) at eval.c:1317 #18 0x80a1b66 in initial_command_loop (load_me=137410564) at #cmdloop.c:305 #19 0x80bb8fe in xemacs_21_2_b36_i386_unknown_freebsd3_3 (argc=4, argv=0xbfbfd790, envp=0xbfbfd7a4, restart=0) at emacs.c:2228 #20 0x80bd7b9 in main (argc=4, argv=0xbfbfd790, envp=0xbfbfd7a4) at emacs.c:2657 #21 0x808607d in _start ()