GNU bug report logs - #17023
24.3.50; font-lock-add-keywords creates duplicates

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Package: emacs;

Reported by: lee <lee <at> yun.yagibdah.de>

Date: Mon, 17 Mar 2014 10:51:02 UTC

Severity: normal

Found in version 24.3.50

Done: Stefan <monnier <at> iro.umontreal.ca>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#17023; Package emacs. (Mon, 17 Mar 2014 10:51:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to lee <lee <at> yun.yagibdah.de>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Mon, 17 Mar 2014 10:51:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: lee <lee <at> yun.yagibdah.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; font-lock-add-keywords creates duplicates
Date: Mon, 17 Mar 2014 11:48:24 +0100

To reproduce:

emacs -q

C-x b test  ;; switch to an arbitrary buffer
M-x describe-variable font-lock-keywords
;; The value of `font-lock-keywords' should be nil.
foobar

(font-lock-add-keywords nil '(("\\_<foobar\\_>" (0 'hi-yellow prepend))))

C-x e ;; to evaluate above expression --- "foobar" is being highlighted
M-x describe-variable font-lock-keywords

;; The value of `font-lock-keywords' is now:

font-lock-keywords is a variable defined in `font-lock.el'.
Its value is (t
 (("\\_<foobar\\_>"
   (0 'hi-yellow prepend)))
 ("\\_<foobar\\_>"
  (0 'hi-yellow prepend)))


The 'hi-yellow face is defined in hi-lock.el.  The
`font-lock-add-keywords' function even removes keywords before adding
them to avoid duplicates.  Yet it seems to create duplicates itself.


In GNU Emacs 24.3.50.2 (x86_64-unknown-linux-gnu, X toolkit)
 of 2014-03-17 on yun.yagibdah.de
Windowing system distributor `Fedora Project', version 11.0.11404000
Configured using:
 `configure --without-gpm --without-toolkit-scroll-bars
 --with-x-toolkit=lucid --enable-link-time-optimization'

-- 
Knowledge is volatile and fluid.  Software is power.
Reply sent to Stefan <monnier <at> iro.umontreal.ca>:
You have taken responsibility. (Mon, 17 Mar 2014 15:07:02 GMT) Full text and rfc822 format available.
Notification sent to lee <lee <at> yun.yagibdah.de>:
bug acknowledged by developer. (Mon, 17 Mar 2014 15:07:03 GMT) Full text and rfc822 format available.

Message #10 received at 17023-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan <monnier <at> iro.umontreal.ca>
To: lee <lee <at> yun.yagibdah.de>
Cc: 17023-done <at> debbugs.gnu.org
Subject: Re: bug#17023: 24.3.50; font-lock-add-keywords creates duplicates
Date: Mon, 17 Mar 2014 11:06:38 -0400

> Its value is (t
>  (("\\_<foobar\\_>"
>    (0 'hi-yellow prepend)))
>  ("\\_<foobar\\_>"
>   (0 'hi-yellow prepend)))

Despite appearances, there is no duplicates here.  The "(t ...)" entry is
just a saved version of the "non-compiled" keywords.


        Stefan
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Tue, 15 Apr 2014 11:24:03 GMT) Full text and rfc822 format available.
This bug report was last modified 11 years and 128 days ago.

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