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bug#25946: 26.0.50; display-buffer ignores ignores reusable-frames in di

From: Jens Lechtenboerger
Subject: bug#25946: 26.0.50; display-buffer ignores ignores reusable-frames in display-buffer-alist
Date: Fri, 03 Mar 2017 11:01:43 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

Hi there,

I fail to get display-buffer-alist working.

Recipe starting from 'emacs -Q':
Eval this expression:
    . (display-buffer-pop-up-frame . '((reusable-frames . t))))))
M-x shell
A shell frame opens as expected.
M-x shell
A new frame is opened, while I expected the existing one to be

Actually, I'm sure that I do not understand the documentation for
display-buffer (redirected from display-buffer-alist).  Maybe that
is a separate bug.

In previous versions of Emacs, I used special-display-buffer-names,
which is obsolete now and points to the variable used above,
display-buffer-alist.  It would be great if the documentation for
that variable explained what to do.  In particular, I would like the
frame to be special/dedicated such that it disappears if the buffer
is killed.  Is that lack of documentation a separate bug?

Best wishes

In GNU Emacs 26.0.50 (build 1, x86_64-unknown-linux-gnu, X toolkit, Xaw3d 
scroll bars)
 of 2017-02-24 built on debian-8
Repository revision: 91932fff1ded8ed3b4d39dd06891f26960153b9e

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