cwarn-mode cause syntax highlighting lost. is this emacs bug?

cwarn-mode cause syntax highlighting lost. is this emacs bug?

[Felix]

after M-x cwarn-mode, most of the c/c++ syntax highlighting is lost,
except for the comments.  i also tried "emacs -q" and still have the
same problem.

i'm using the cvs version of emacs, is this an emacs bug? or did i
miss something?

Re: cwarn-mode cause syntax highlighting lost. is this emacs bug?

[Klaus Zeitler]

>>>>> "Felix" == Felix  <fengli@gmail.com> writes:
    Felix> 
    Felix> after M-x cwarn-mode, most of the c/c++ syntax highlighting is lost,
    Felix> except for the comments.  i also tried "emacs -q" and still have the
    Felix> same problem.

Comments and Strings, that's what I still see.

    Felix> i'm using the cvs version of emacs, is this an emacs bug? or did i
    Felix> miss something?

I think this is a bug in CVS emacs, that must have been introduced recently.
The same happens when you use hi-lock-mode. I already did send a bug report
for hi-lock-mode about 10 days ago, but haven't gotten any response so far
(with Subject "No highlight of keywords when hi-lock-mode is called").
Please send a bug report to emacs-pretest-bug@gnu.org (maybe you could hint
at my bug report).

Klaus

-- 
 ------------------------------------------
|  Klaus Zeitler      Lucent Technologies  |
 ------------------------------------------
---
The way to make a small fortune in the commodities
market is to start with a large fortune.

Re: cwarn-mode cause syntax highlighting lost. is this emacs bug?

[Thorsten Bonow]

>>>>> "Klaus" == Klaus Zeitler <kzeitler+usenet@gsm-mailhost.de.lucent.com> writes:

>>>>> "Felix" == Felix  <fengli@gmail.com> writes:

    Felix> after M-x cwarn-mode, most of the c/c++ syntax highlighting is lost,
    Felix> except for the comments.  i also tried "emacs -q" and still have the
    Felix> same problem.

Hi,

it appears to be a bug in CVS emacs, related to font-lock-add-keywords. I just
updated via CVS, no fix yet.

    Klaus> [...] Please send a bug report to emacs-pretest-bug@gnu.org (maybe
    Klaus> you could hint at my bug report).

Oliver Scholz already posted, no reply yet. I include his message below because
it contains a small test...

Toto

CVS from today: Starting from emacs -q --no-site-file eval the
following:

-------------------------
(progn
  (switch-to-buffer (generate-new-buffer "*tmp*"))
  (emacs-lisp-mode)
  (font-lock-mode 1)
  ;; This is the evildoer:
  (font-lock-add-keywords nil '(("lirum larum" . font-lock-warning-face)))
  ;; Examples:
  (insert ";; Strings and comments work o.k.:\n" "\"this is a string\"\n\n")
  (insert ";; The new keyword is highlighted correctly:\n" "lirum larum\n\n")
  (insert ";; But this is not hightlighted correctly:\n")
  (insert "(defun lirum-larum ()\n  (save-excursion\n    (message \"lirum larum\"))))"))
-------------------------


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