GNU bug report logs - #19511
25.0.50; Failed assertions in redisplay() code. (dispnew.c:1405; xdisp.c:17524)

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Message #16 received at 19511-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Vitalie Spinu <spinuvit <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, Andreas Matthias <andreas.matthias <at> gmail.com>,
 19511-done <at> debbugs.gnu.org
Subject: Re: bug#19511: 25.0.50;
 Failed assertions in redisplay() code. (dispnew.c:1405; xdisp.c:17524)
Date: Mon, 05 Jan 2015 12:53:54 -0500

> Removing it doesn't change the fact that buffers are switched
> (with-current-buffer ...) inside font-lock-fontify-region-function.

with-current-buffer is basically equivalent to something like

  (let ((current-buffer ..)) ...)

[ tho implemented differently for technical reasons.  ]
So it doesn't have any undesirable interactions with the redisplay code.

> Would it be enough to remove `bury-buffer` call to get back the
> optimization? What are other elisp functions that can potentially
> invalidate window_end?

Any function which changes which buffer is being displayed in
a particular window.


        Stefan

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