21.4.2 mwheel.el woes

I decided to use mwheel.el to make my m$ intellimouse work with XEmacs 21.4.2 built on RedHat 7.1. In .xemacs/.init.el: (autoload 'mwheel-install "mwheel" "Enable mouse wheel support.") (mwheel-install) and in .xemacs/custom.el (custom-set-variables '(mwheel-follow-mouse t)) When I abuse the mouse wheel, going quickly up-and-down to the beginning and end of my VM INBOX Summary buffer, XEmacs dies with the following lisp backtrace (unfortunately no coredump): Fatal error (10). [ ... ] Lisp backtrace follows: ding(nil buffer-bound) # bind (etype debug-on-error inhibit-quit old-debug-on-error error-object) command-error((end-of-buffer)) # (catch exit ...) # bind (standard-input standard-output) # (unwind-protect ...) recursive-edit() # bind (inhibit-trace standard-output buffer-read-only) byte-code("..." [print-escape-newlines print-length debugger-buffer debugger-value standard-output debugger-args pop-to-buffer erase-buffer t 50 backtrace debugger-mode re-search-forward "\n[* ] debug(" 1 debugger-reenable (lambda debug) "Entering:\n" debug backtrace-debug 3 delete-char ?* 0 exit "Return value: " prin1 ?\n ?\ error "Signaling: " "Beginning evaluation of function call form:\n" nil message "" recursive-edit buffer-read-only inhibit-trace] 3) # (unwind-protect ...) # (unwind-protect ...) # bind (last-command this-command unread-command-event last-input-event last-input-char last-input-time last-command-event last-command-char overriding-local-map load-read-function standard-input standard-output cursor-in-echo-area) # (unwind-protect ...) # bind (debugger-value debug-on-error debug-on-quit debug-on-signal debugger-buffer debugger-old-buffer debugger-step-after-exit executing-macro debugger-outer-match-data debugger-outer-load-read-function debugger-outer-overriding-local-map debugger-outer-last-command debugger-outer-this-command debugger-outer-unread-command-event debugger-outer-unread-command-events debugger-outer-last-input-event debugger-outer-last-input-char debugger-outer-last-input-time debugger-outer-last-command-event debugger-outer-last-command-char debugger-outer-standard-input debugger-outer-standard-output debugger-outer-cursor-in-echo-area debugger-args) debug(error (undefined-keystroke-sequence [#<keypress-event control-meta-G>])) # (catch debugger ...) # (unwind-protect ...) # bind (stack-trace-on-signal debug-on-signal stack-trace-on-error debug-on-error) # (condition-case ... . error) # (catch top-level ...) uname -a: Linux localhost.localdomain 2.4.2-2 #1 Sun Apr 8 20:41:30 EDT 2001 i686 unknown ./configure '--with-xface' '--extra-verbose' '--with-widgets=athena' '--with-athena=3d' '--with-dialogs=athena' '--with-scrollbars=lucid' '--with-menubars=lucid' '--cache-file=/dev/null' '--external-widget' XEmacs 21.4.2 "Developer-Friendly Unix APIs" configured for `i686-pc-linux'. Compilation / Installation: Source code location: /usr/local/src/xemacs-21.4.2 Installation prefix: /usr/local Operating system description file: `s/linux.h' Machine description file: `m/intel386.h' Compiler: gcc -g -O3 -Wall -Wno-switch -Winline -Wmissing-prototypes -Wshadow -Wsign-compare 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. Compiling in support for the Athena widget set: - Athena headers location: X11/Xaw3d - Athena library to link: Xaw3d Using Lucid menubars. Using Lucid scrollbars. Using Athena dialog boxes. Using Athena native widgets. TTY: Compiling in support for ncurses. Compiling in support for GPM (General Purpose Mouse). Images: Compiling in support for GIF images (builtin). Compiling in support for XPM images. Compiling in support for PNG images. Compiling in support for JPEG images. Compiling in support for TIFF images. Compiling in support for X-Face message headers. Sound: Compiling in support for sound (native). Compiling in support for ESD (Enlightened Sound Daemon). Databases: Compiling in support for Berkeley database. Compiling in support for LDAP. Internationalization: Mail: Compiling in support for "dot-locking" mail spool file locking method. Other Features: Compiling in support for dynamic shared object modules.