John Stutz writes: XEmacs 21.4 is over 10 years old; the :visible keyword was not implemented then, I suppose, and new feature development is all done in the 21.5 branch since about 2001. Without a C backtrace, there is essentially no way to diagnose a crash. If core files are enabled, you can get the C backtrace with "gdb `which xemacs` COREFILE" (sorry, I don't know where Fedora keeps its core files), and typing "bt" to the (gdb) prompt. Copy/paste from the terminal output. On Fedora to get a useful backtrace you will need to install the xemacs debug package, which installs the symbol table for your binary (I'm not sure what it's called), and you may need to specify the symbol file explicitly to gdb with the "--symbols=SYMBOLFILE" option. Otherwise, you can run XEmacs under gdb with "gdb `which xemacs`" which will allow you to get a backtrace in the future. (The caveat about the debug package and the symbol file applies here, too.) This does not slow down XEmacs but does tie up a terminal window. (If you use "xemacs -nw" and run in a terminal window, you also have to be careful of interrupt characters, specifically C-z and multiple C-g in quick succession. The exact effect depends on the configuration of gdb.) I recommend that you upgrade to the most recent XEmacs 21.4 at least (ISTR that a crash was fixed in that version). For more modern features, you might want to upgrade to XEmacs 21.5 (beta32 was released yesterday). Although there remains a lot of work to fully implement GNU compatibility, XEmacs 21.5 is very stable in use. It's probably in /usr/share/xemacs-21.4.20/etc/PROBLEMS. It's not possible to generate a C backtrace without a debugger. This is very bad. I've never seen it personally. Make that "strongly recommend" an upgrade. Anything that interferes with autosave is worth a fair amount of effort to avoid. I don't think I've ever seen a crash from this function. I'll keep it in mind, but this doesn't help localize the cause crash. Steve _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta