Font locking bug - infinite loop

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. In XEmacs 21.5 (beta0) "alfalfa" [Lucid] (i686-pc-linux, Mule) of Mon May 7 2001 on ant.corp.google.com configured using `configure --with-mule --prefix=/red/xemacs' Please describe exactly what actions triggered the bug and the precise symptoms of the bug: Hi, I've been whittling away my ~/.vm file until I could get this bug to occur reliably. I've also run xemacs -q to avoid loading my own ~/.emacs file. So I think after many weeks of trying to pin this down, I've come down to a small bit of ~/.vm code that triggers the bug on my system. Symptoms: I run M-x vm and the font locking progress bar starts flickering a whole lot, and it never completes. So I suspect there's a bug in the font locking code. However ... while removing things from ~/.vm, I found that the font locking alone wasn't enough to trigger the bug. I also had to set the frame properties on my VM frame. So here's my ~/.vm file: ====================================================================== ;;; TEMPORARY FILE ONLY FOR BETA TESTING XEMACS 21.5 (setq font-lock-auto-fontify t) (setq vm-folder-directory "~/Mail/") ;; Allow ~/Mail/*.spool to be used to fill the corresponding ~/Mail/* folder (setq vm-spool-file-suffixes '(".spool")) (setq vm-crash-box-suffix ".CRASH") (setq vm-primary-inbox "~/Mail/INBOX") (setq vm-crash-box "~/Mail/INBOX.CRASH") ;; Font locking for the summary buffer (defun my-vm-font-lock () (interactive) (make-variable-buffer-local 'font-lock-keywords-only) (setq font-lock-keywords-only t) (turn-on-font-lock) ) (add-hook 'vm-summary-mode-hook 'my-vm-font-lock) (setq vm-summary-font-lock-keywords '( ("Re:" 1 yellow t) )) ;; Frame/Window configuration (setq vm-frame-parameter-alist '((primary-folder ( (name . "vm") (height . 60) (width . 80) (toolbar-shadow-thickness . 1) (border-width . 3) (border-color . "#f0f0e0") (left . 1) (top . 1) )))) ====================================================================== At times my entire XEmacs will crash; at other times it takes a few Ctrl-G's *and* Q (to quit VM) to restore sanity. (And I still can't get to my email.) I'm using 21.1.14 in the meantime .. Anyway, I'd really like to hear if anyone else can reproduce it. If not, I'll try harder to look for anything else that might be involved. - Amit Recent keystrokes: M-x v m RET q misc-user Recent messages (most recent first): Loading mail-abbrevs... Loading emacsbug...done Loading emacsbug... Quitting... Loading vm-virtual...done Loading vm-virtual... Quit Loading vm-sort...done Loading vm-sort... Loading font-lock...done