Re: cperl + isearch + font-lock-multiline sometimes very slow

[martin rudalics]

Two further issues which, however, don't seem related to the bug:

(1) The following causes an Invalid face reference

(defcustom cperl-invalid-face           ; Does not customize with '' on XEmacs
  (if cperl-singly-quote-face
      'underline ''underline) ; On older Emacsen was evaluated by `font-lock'
  (if cperl-singly-quote-face
      "*This face is used for highlighting trailing whitespace."
    "*Face for highlighting trailing whitespace.")
  :type 'face
  :version "21.1"
  :group 'cperl-faces)

Momentary remedy: Use

(defcustom cperl-invalid-face 'underline
  "*Face for highlighting trailing whitespace."
  :type 'face
  :version "21.1"
  :group 'cperl-faces)

instead.


(2) `cperl-mode' sets `font-lock-multiline' _globally_ to t with all
sorts of unpleasing side-effects.  This should be obviously done via
`font-lock-set-defaults'.

Momentary remedy: Change the setting of this variable in `cperl-mode'
to:
        (set (make-local-variable 'font-lock-multiline) t))

(I think `font-lock-multiline' asks for `make-variable-buffer-local' in
font-lock to defy similar attempts to set this.)