Hi! The HEAD version of XEmacs 21.5 (beta6) "bok choi" [Lucid] (i386-unknown-freebsd4.5, Mule) of Mon May 6 2002 on lamia.lf.net dumps core if startet in its own frame. The backtrace is (many repetitions of the signal_extend_changed message, like, more than 5000) GNU gdb 4.18 Copyright 1998 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-unknown-freebsd"... Core was generated by `xemacs-21.5-b6'. Program terminated with signal 4, Illegal instruction. Reading symbols from /usr/X11R6/lib/libaudio.so.2...done. Reading symbols from /usr/local/lib/libtiff.so.4...done. Reading symbols from /usr/local/lib/libpng.so.5...done. Reading symbols from /usr/local/lib/libjpeg.so.9...done. Reading symbols from /usr/lib/libz.so.2...done. Reading symbols from /usr/X11R6/lib/libcompface.so.1...done. Reading symbols from /usr/X11R6/lib/libXpm.so.4...done. Reading symbols from /usr/X11R6/lib/libXmu.so.6...done. Reading symbols from /usr/X11R6/lib/libXt.so.6...done. Reading symbols from /usr/X11R6/lib/libXext.so.6...done. Reading symbols from /usr/X11R6/lib/libX11.so.6...done. Reading symbols from /usr/X11R6/lib/libSM.so.6...done. Reading symbols from /usr/X11R6/lib/libICE.so.6...done. Reading symbols from /usr/lib/libncurses.so.5...done. Reading symbols from /usr/local/lib/libintl.so.2...done. Reading symbols from /usr/lib/libm.so.2...done. Reading symbols from /usr/lib/libutil.so.3...done. Reading symbols from /usr/lib/libxpg4.so.3...done. Reading symbols from /usr/lib/libc.so.4...done. Reading symbols from /usr/X11R6/lib/libXThrStub.so.6...done. Reading symbols from /usr/local/lib/libiconv.so.3...done. Reading symbols from /usr/X11R6/lib/X11/locale/common/xlcDef.so.2...done. Reading symbols from /usr/X11R6/lib/X11/locale/common/ximcp.so.2...done. Reading symbols from /usr/X11R6/lib/X11/locale/common/xomGeneric.so.2...done. Reading symbols from /usr/libexec/ld-elf.so.1...done. #0 0x8110182 in signal_extent_changed (extent=0x8552448, property={gu = { type = Lisp_Type_Record, val = 35430437}, s = {bits = 0, val = 70860874}, u = {bits = 0, val = 70860874}, ui = 141721748, i = 141721748, v = 0x8728094}, old_start=0, old_end=0, descendants_too=1) at extents.c:1636 1636 } (gdb) #0 0x8110182 in signal_extent_changed (extent=0x8552448, property={gu = { type = Lisp_Type_Record, val = 35430437}, s = {bits = 0, val = 70860874}, u = {bits = 0, val = 70860874}, ui = 141721748, i = 141721748, v = 0x8728094}, old_start=0, old_end=0, descendants_too=1) at extents.c:1636 #1 0x8110269 in signal_extent_changed (extent=0x8552448, property={gu = { type = Lisp_Type_Record, val = 35430437}, s = {bits = 0, val = 70860874}, u = {bits = 0, val = 70860874}, ui = 141721748, i = 141721748, v = 0x8728094}, old_start=0, old_end=0, descendants_too=1) at extents.c:1670 #2 0x8110269 in signal_extent_changed (extent=0x8552448, property={gu = { type = Lisp_Type_Record, val = 35430437}, s = {bits = 0, val = 70860874}, u = {bits = 0, val = 70860874}, ui = 141721748, i = 141721748, v = 0x8728094}, old_start=0, old_end=0, descendants_too=1) at extents.c:1670 norbert.