GNUS overlays problem

GNUS overlays problem

[Peter Whaite]

Bill Wohler has asked me to report a problem we had while testing mh-e
for the pending emacs release.

I found that the gnus packages used to display messages in mh-e are
leaking overlays.  This is because the overlay evaporate property is not
set by default, so they are not destroyed when the buffer is erased in
preparation for a new message.

Peter Whaite <peta@whaite.ca> wrote:
> I <peta@whaite.ca> wrote:
> >
> > Well I dont see a bug in CVS emacs overlay handling.  Perhaps the
> > problem lies in a package external to mh-e, e.g. gnus.
> 
> Looks like thats where the problem lies.  Its leaking gnus overlays that
> don't have an evaporate property.
> 
> (pp (save-current-buffer
>   (set-buffer (get-buffer-create "show-+inbox"))
>   (mapcar (lambda (ov) (list (overlay-start ov) (overlay-end ov)
>   	  	       	     (overlay-properties ov)))
> 	  (overlays-in (point-min) (point-max)))
>   ))

These are overlays being used to display the current mail message

> ((515 558
>       (face gnus-cite-face-2))
>  (443 512
>       (face gnus-cite-face-2))
>  (378 437
>       (face gnus-cite-face-2))
>  (302 374
>       (face gnus-cite-attribution-face))
>  (302 374
>       (face gnus-cite-face-2))

and these are zero length overlays left from the display of previous
messages

>  (1 1
>     (face gnus-cite-face-2))
>  (1 1
>     (face gnus-cite-face-2))
>  (1 1
>     (face gnus-cite-attribution-face))
>  (1 1
>     (face gnus-cite-face-3))
>  (1 1
>     (keymap
>      (keymap
>       (mouse-2 . smiley-mouse-toggle-buffer)
>       (down-mouse-2 . ignore))
>      help-echo "mouse-2: toggle smilies in buffer" smiley t mouse-face highlight display
>      (when smiley-active image :type pbm :file "/usr/local/share/emacs/21.3.50/lisp/gnus/smile.pbm" :ascent center)))
>     (face gnus-cite-face-2))
> 
>   ...and many more
> )

-- 
Peter Whaite (http://whaite.ca)

Re: GNUS overlays problem

[Steve Youngs]

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* Peter Whaite <peta@whaite.ca> writes:

  > Date: Fri, 17 Sep 2021 18:00:42 -0400

WTF?


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