crash of xemacs on unix

when I use ctl+k keys to delete a line, it crashes. Here is the info: Fatal error (11). Your files have been auto-saved. Use `M-x recover-session' to recover them. Your version of XEmacs was distributed with a PROBLEMS file that may describe your crash, and with luck a workaround. Please check it first, but do report the crash anyway. Please report this bug by invoking M-x report-emacs-bug, or by selecting `Send Bug Report' from the Help menu. If necessary, send ordinary email to `crashes(a)xemacs.org&#39;. *MAKE SURE* to include the XEmacs configuration from M-x describe-installation, or equivalently the file Installation in the top of the build tree. *Please* try *hard* to obtain a C stack backtrace; without it, we are unlikely to be able to analyze the problem. Locate the core file produced as a result of this crash (often called `core' or `core.<process-id>', and located in the directory in which you started XEmacs or your home directory), and type gdb /usr/local/bin/xemacs core then type `where' at the debugger prompt. No GDB on your system? You may have DBX, or XDB, or SDB. (Ask your system administrator if you need help.) If no core file was produced, enable them (often with `ulimit -c unlimited' in case of future recurrance of the crash. Lisp backtrace follows: own-selection-internal(CLIPBOARD "add 37.2.163.8.242.0.0.0/40\n" nil nil) # bind (zmacs-region-stays data-type how-to-add type data) own-selection("add 37.2.163.8.242.0.0.0/40\n" CLIPBOARD) # bind (push string) own-clipboard("add 37.2.163.8.242.0.0.0/40\n" t) # bind (replace string) kill-new("add 37.2.163.8.242.0.0.0/40\n") # bind (undo-high-threshold tail verbose end start) kill-region(1 29) # bind (entire-line arg) kill-line-1(nil nil) # bind (arg) kill-line(nil) # bind (command-debug-status) call-interactively(kill-line) # (condition-case ... . error) # (catch top-level ...) [1] Segmentation fault xemacs table8 (core dumped) core: (cisco-5.0.6-gdb) where #0 0xef20a8f0 in _libc_kill () from /usr/lib/libc.so.1 #1 0x880c0 in fatal_error_signal () #2 <signal handler called> #3 0xef6b1bf8 in _XmClipboardIsMarkedForDelete () from /usr/dt/lib/libXm.so.3 #4 0xef686730 in _XmClipboardDeleteMarked () from /usr/dt/lib/libXm.so.3 #5 0xef6865f0 in XmClipboardEndCopy () from /usr/dt/lib/libXm.so.3 #6 0x169b4c in hack_motif_clipboard_selection () #7 0x169a50 in x_own_selection () #8 0x13ea20 in Fown_selection_internal () #9 0x8fad4 in Ffuncall () #10 0x6a980 in execute_optimized_program () #11 0x6a4fc in funcall_compiled_function () #12 0x8f998 in Ffuncall () #13 0x6a980 in execute_optimized_program () #14 0x6a4fc in funcall_compiled_function () #15 0x8f998 in Ffuncall () #16 0x6a980 in execute_optimized_program () #17 0x6a4fc in funcall_compiled_function () #18 0x8f998 in Ffuncall () #19 0x6a980 in execute_optimized_program () #20 0x6a4fc in funcall_compiled_function () #21 0x8f998 in Ffuncall () #22 0x6a980 in execute_optimized_program () #23 0x6a4fc in funcall_compiled_function () #24 0x8f998 in Ffuncall () #25 0x6a980 in execute_optimized_program () #26 0x6a4fc in funcall_compiled_function () #27 0x8f998 in Ffuncall () #28 0x6e55c in Fcall_interactively () #29 0x8e834 in Fcommand_execute () #30 0xb7e98 in execute_command_event () #31 0xb82b0 in Fdispatch_event () #32 0x738e8 in Fcommand_loop_1 () #33 0x8cbd4 in condition_case_1 () #34 0x73208 in command_loop_3 () #35 0x7322c in command_loop_2 () #36 0x8c834 in internal_catch () #37 0x733f4 in initial_command_loop () #38 0x893b0 in xemacs_21_4_13_sparc_sun_solaris2_5_1 () #39 0x89c08 in main ()