Although I can't reproduce it, xemacs has core dumped twice to me in the past few days. Both times, I hit C-h v whil emy cursor was on a variable name, once in an apropos buffer, the second time in an .el file. #0 0xeefc7fe4 in _kill () #1 0x484e0 in fatal_error_signal (sig=11) at emacs.c:262 #2 <signal handler called> #3 skip_chars (buf=0x5c5a00, forwardp=0, syntaxp=1, string=2254750, lim=1) at buffer.h:643 #4 0xf2bd4 in Fskip_syntax_backward (syntax=1612867472, lim=-1607790588, buffer=-1607790588) at search.c:941 #5 0x4cff0 in funcall_recording_as (recorded_as=-1607681540, nargs=1, args=0xefffdd48) at eval.c:3193 #6 0x51364 in Ffuncall (nargs=2, args=0xefffdd48) at eval.c:3238 #7 0x27890 in Fbyte_code (bytestr=1612867288, vector=-2145229012, maxdepth=2616320) at bytecode.c:416 #8 0x4c8a8 in Feval (form=1075996360) at eval.c:3063 #9 0x49e68 in condition_case_1 (handlers=1075996584, bfun=0x4c074 <Feval>, barg=1075996360, hfun=0x49eb4 <run_condition_case_handlers>, harg=-1607790588) at eval.c:1653 #10 0x51174 in condition_case_3 (bodyform=1075996360, var=-1607790588, handlers=1075996584) at eval.c:1715 #11 0x27d50 in Fbyte_code (bytestr=1612867236, vector=-2145229128, maxdepth=2616320) at bytecode.c:576 #12 0x4e330 in funcall_lambda (fun=539125688, nargs=0, arg_vector=0xefffe388) at eval.c:3597 #13 0x4dd34 in apply_lambda (fun=539125688, numargs=0, unevalled_args=-1607790588) at eval.c:3501 #14 0x4ca30 in Feval (form=1075999484) at eval.c:3085 #15 0x49274 in FletX (args=1075999452) at eval.c:853 #16 0x4c5f4 in Feval (form=1075999444) at eval.c:2997 #17 0x29000 in Fcall_interactively (function=-1606927828, record_flag=-1607790588, keys=-1607790588) at callint.c:339 #18 0x4ba84 in Fcommand_execute (cmd=-1606927828, record=-1607790588, keys=-1607790588) at eval.c:2584 #19 0x75540 in execute_command_event (command_builder=0x408cc0, event=542698288) at event-stream.c:4346 #20 0x75bf4 in Fdispatch_event (event=542698288) at event-stream.c:4637 #21 0x2ebb8 in Fcommand_loop_1 () at cmdloop.c:579 #22 0x2edf0 in command_loop_1 (dummy=-1607790588) at cmdloop.c:494 #23 0x49e68 in condition_case_1 (handlers=-1607790492, bfun=0x2edcc <command_loop_1>, barg=-1607790588, hfun=0x2ee54 <cmd_error>, harg=-1607790588) at eval.c:1653 #24 0x2ef68 in command_loop_2 (dummy=-1607790588) at cmdloop.c:256 #25 0x51074 in internal_catch (tag=-1607712916, func=0x2ef1c <command_loop_2>, arg=-1607790588, threw=0x0) at eval.c:1328 #26 0x2e68c in initial_command_loop (load_me=192284) at cmdloop.c:305 #27 0x46f78 in xemacs_21_0_sparc_sun_solaris2_6 (argc=1, argv=0xeffff064, envp=0xeffff06c, restart=0) at emacs.c:1702 #28 0x486c8 in main (argc=0, argv=0xeffff064, envp=0xeffff06c) at emacs.c:2119 uname -a: SunOS monkeyboy.sendmail.org 5.6 Generic_105181-06 sun4m sparc ./configure '--site-prefixes=/usr/local' '--with-database=dbm,berkdb' '--with-pop' '--debug' '--site-includes=/usr/local/bind/include' '--site-libraries=/usr/local/bind/lib' XEmacs 21.0 "Zhong Wei" configured for `sparc-sun-solaris2.6'. Where should the build process find the source code? /usr/local/src/xemacs/xemacs-21.0-b48 What installation prefix should install use? /usr/local What operating system and machine description files should XEmacs use? `s/sol2.h' and `m/sparc.h' What compiler should XEmacs be built with? gcc -g -O3 -Wall -Wno-switch Should XEmacs use the GNU version of malloc? yes Should XEmacs use the relocating allocator for buffers? yes What window system should XEmacs use? x11 Where do we find X Windows header files? /usr/dt/include /usr/openwin/include Where do we find X Windows libraries? /usr/dt/lib /usr/openwin/lib Additional header files: /usr/local/bind/include Additional libraries: /usr/local/bind/lib Additional prefixes: /usr/local Runtime library search path: /usr/local/pilot/lib:/usr/local/bind/lib:/usr/local/samba/lib:/usr/local/lib:/usr/openwin/lib:/usr/dt/lib:/usr/share/lib:/lib:/usr/ccs/lib:/opt/SUNWspro/lib:/usr/lib:/usr/local/ssl/lib Compiling in support for XAUTH. Compiling in support for XPM images. Compiling in support for X-Face message headers. Compiling in support for JPEG image conversion. Compiling in support for PNG image conversion. Compiling in support for TIFF image conversion. Compiling in native sound support. Compiling in support for Berkeley DB. Compiling in support for DBM. Compiling in support for ncurses. Compiling in support for CDE. Compiling in support for ToolTalk. Compiling in EXPERIMENTAL support for Drag'n'Drop ( CDE ). Compiling in support for proper session-management. Using Lucid menubars. Using Lucid scrollbars. Using Motif dialog boxes. Compiling in DLL support. movemail will use "dot-locking" for locking mail spool files. Using POP for mail access Compiling in extra code for debugging. Compiling in code for checking XEmacs memory usage.