[crash] delete a buffer shown in both X and tty frames

This bug report will be sent to the XEmacs Development Team, not to your local site managers!! Please write in English, because the XEmacs maintainers do not have translators to read other languages for them. In XEmacs 21.2 (beta38) "Peisino,Ak(B" [Lucid] (i386-unknown-freebsd4.2, Mule) of Wed Dec 13 2000 on elvenbow.nc.kyushu-u.ac.jp configured using `configure --with-mule --without-xim --error-checking=all --debug --with-xfs --with-widgets=athena --without-canna --site-prefixes=/usr/local '--cflags=-g -O3 -pipe -Wall -Wno-switch -Wpointer-arith -Winline -Wmissing-prototypes -Wshadow'' Please describe exactly what actions triggered the bug and the precise symptoms of the bug: xemacs -vanilla M-x make-frame-on-tty C-x b test (in the X frame) C-x b test (in the tty frame) C-x k (in the X frame) ** crash ** It is repeatable. It won't crash when doing C-x k in the tty frame. Lisp backtrace follows: # (condition-case ... . error) # (catch top-level ...) C backtrace follows: (gdb) where #0 0x286323e0 in kill () from /usr/lib/libc.so.4 #1 0x80bb823 in fatal_error_signal (sig=6) at emacs.c:535 #2 0xbfbfffac in ?? () #3 0x80be869 in assert_failed (file=0x824d9a7 "eval.c", line=1885, expr=0x824d508 "abort()") at emacs.c:3214 #4 0x80c12f1 in signal_1 (sig=137300068, data=142340244) at eval.c:1885 #5 0x80c2791 in error (fmt=0x8285dc0 "Marker does not point anywhere") at eval.c:2052 #6 0x8194e66 in marker_position (marker=141246172) at marker.c:354 #7 0x81afc17 in redisplay_window (window=141753344, skip_selected=0) at redisplay.c:5896 #8 0x81b098c in redisplay_frame (f=0x8738400, preemption_check=0) at redisplay.c:6393 #9 0x81b0b6f in redisplay_device (d=0x870a600, automatic=1) at redisplay.c:6467 #10 0x81b0edd in redisplay_without_hooks () at redisplay.c:6556 #11 0x81b8ee6 in redisplay () at redisplay.c:6613 #12 0x8114eca in Fnext_event (event=141418308, prompt=137299972) at event-stream.c:2176 #13 0x80a2ce9 in Fcommand_loop_1 () at cmdloop.c:574 #14 0x80a2f96 in command_loop_1 (dummy=137299972) at cmdloop.c:494 #15 0x80cac25 in condition_case_1 (handlers=137300068, bfun=0x80a2f58 <command_loop_1>, barg=137299972, hfun=0x80a3008 <cmd_error>, harg=137299972) at eval.c:1651 #16 0x80a30f7 in command_loop_2 (dummy=137299972) at cmdloop.c:256 #17 0x80cab24 in internal_catch (tag=137384396, func=0x80a30bc <command_loop_2>, arg=137299972, threw=0x0) at eval.c:1317 #18 0x80a256e in initial_command_loop (load_me=137299972) at cmdloop.c:305 #19 0x80bcb9f in xemacs_21_2_b38_i386_unknown_freebsd4_2 (argc=2, argv=0xbfbff5b4, envp=0xbfbff5c0, restart=0) at emacs.c:2253 #20 0x80bead1 in main (argc=2, argv=0xbfbff5b4, envp=0xbfbff5c0) at emacs.c:2682 #21 0x80808e9 in _start () -- Yoshiaki Kasahara Computing and Communications Center, Kyushu University kasahara(a)nc.kyushu-u.ac.jp