mouse-avoidance-fancy-hook sometimes causes an error

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. Please describe as succinctly as possible: - What happened. - What you thought should have happened. - Precisely what you were doing at the time. Please also include any C or lisp back-traces that you may have. ================================================================ Dear Bug Team! I have my post-command-hook set as follows: (blink-cursor-post-command-hook mouse-avoidance-fancy-hook paren-highlight) Sometimes, I get an error ("such and such out of range, setting post-command-hook to nil"). This appears to happen most often when I delete a buffer. Experimenting with the three functions above, I found that putting (condition-case nil ( .. ) (error nil)) around mouse-avoidance-fancy-hook stopped the error. I'm not exactly sure what the bug is, but it appears to be that the function is trying to read part of a buffer that no longer exists. I reported this error a little while ago, but nothing seems to have happened; I suggest that the fix above is reasonable (since mouse-avoidance-fancy-hook should never normally raise an error), although it would obviously be better to fix the underlying bug. ================================================================ System Info to help track down your bug: --------------------------------------- uname -a: Linux emotion 2.4.9 #4 Thu Oct 4 18:45:05 BST 2001 i686 unknown ./configure '--prefix=/home/rrt' XEmacs 21.4.6 "Common Lisp" configured for `i686-pc-linux'. Compilation / Installation: Source code location: /home/rrt/src/xemacs-21.4.6 Installation prefix: /home/rrt Operating system description file: `s/linux.h' Machine description file: `m/intel386.h' Compiler: gcc -g -O3 -Wall -Wno-switch -Winline -Wmissing-prototypes -Wsign-compare -Wshadow Relocating allocator for buffers: no GNU version of malloc: yes - Using Doug Lea's new malloc from the GNU C Library. Window System: Compiling in support for the X window system: - X Windows headers location: /usr/X11R6/include - X Windows libraries location: /usr/X11R6/lib - Handling WM_COMMAND properly. Using Lucid menubars. Using Lucid scrollbars. TTY: Compiling in support for ncurses. Images: Compiling in support for GIF images (builtin). Compiling in support for XPM images. WARNING: ----------------------------------------------------------- WARNING: Compiling without PNG image support. WARNING: You should strongly consider installing the PNG libraries. WARNING: Otherwise certain images and glyphs may not display. WARNING: (a copy may be found in ftp://ftp.xemacs.org/pub/xemacs/aux) WARNING: ----------------------------------------------------------- Compiling in support for X-Face message headers. Sound: Compiling in support for sound (native). Databases: Compiling in support for Berkeley database. Internationalization: Mail: Compiling in support for "dot-locking" mail spool file locking method. Other Features: Inhibiting IPv6 canonicalization at startup. Compiling in support for dynamic shared object modules. Load-Path Lisp Shadows: ---------------------- (/home/rrt/elisp/bbdb-vm /home/rrt/lib/xemacs/site-packages/lisp/bbdb/bbdb-vm /home/rrt/elisp/winring /home/rrt/lib/xemacs/xemacs-packages/lisp/edit-utils/winring /home/rrt/elisp/setnu /home/rrt/lib/xemacs/xemacs-packages/lisp/edit-utils/setnu /home/rrt/elisp/vm-mime /home/rrt/lib/xemacs/xemacs-packages/lisp/vm/vm-mime) Installed XEmacs Packages: ------------------------- ((xemacs-devel:version 1.4 :type single-file) (xemacs-base :version 1.58 :type regular) (w3 :version 1.21 :type regular) (vm :version 7.02 :type regular) (view-process :version 1.11 :type regular) (vc :version 1.3 :type regular) (tm :version 1.3 :type regular) (time :version 1.11 :type regular) (textools :version 1.12 :type regular) (text-modes :version 1.37 :type single-file) (texinfo :version 1.2 :type regular) (supercite :version 1.19 :type regular) (speedbar :version 1.22 :type regular) (slider :version 1.13 :type regular) (sh-script :version 1.13 :type regular) (sgml 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lucid-menubars x c-balloon-help tty-frames tty toolbar native-sound scrollbar unix-processes multicast network-streams subprocesses modules menu-accelerator-support menubar berkeley-db md5 xemacs gutter gif xface xpm xbm lisp-float-type linux devices window-system base64) Recent keystrokes: ----------------- left left left left left left left left left left left left left left left left left left left left left left left left left left left left left left left j b m 1 1 ＠ c a m . a c . u k , SPC RET s q h u v C-g q M-x x m e TAB BS e BS e BS e BS BS e m TAB r e p TAB o TAB BS BS BS BS BS BS BS BS BS BS BS r e p o r t - x e TAB RET Recent messages (most recent first): ----------------------------------- Loading xemacsbug...done Loading xemacsbug... Wrote /home/rrt/mail/inbox Saving... Stuffing attributes... Quitting... Quit Wrote /home/rrt/.bbdb Type M-x switch-to-buffer-other-window RET to restore old contents of the bbdb-list window. Loading bbdb-gui...done Loading bbdb-gui... Formatting...done. Formatting... Deleted messages expunged. Expunging... 1 message saved to /home/rrt/mail/people/jbm End of message 4 from James Martin Sending...done Wrote /home/rrt/mail/people/jbm Sending... -- http://sc3d.org/rrt/ | certain, a. insufficiently analysed