GNU bug report logs - #34317
26.1.90; Wrong unbinding order in x_consider_frame_title

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From: martin rudalics <rudalics <at> gmx.at>
To: 34317 <at> debbugs.gnu.org
Subject: bug#34317: 26.1.90; Wrong unbinding order in x_consider_frame_title
Date: Tue, 19 Feb 2019 10:07:36 +0100

> The unbinding order in x_consider_frame_title is botched.  Hence,
> while do_switch_frame will not resize the minibuffer window when the
> frame of the title bar gets selected, it will still resize when the
> old frame gets reselected in the unbind form.
>
> The behavior can be seen with emacs -Q evaluating the following two
> forms in row:
>
> (make-frame '((minibuffer . nil)))
> (y-or-n-p "\n")

Maybe it's not entirely clear from this description.  The

(y-or-n-p "\n")

form must be evaluated in the new, minibuffer-less frame.  Then the
minibuffer window in the first, minibuffer-equipped frame appears
empty.

> The attached trivial patch cures it.  Obviously, there's no guarantee
> that some other client relies on the wrong order.

Any suggestions on how to proceed?  This is a regression wrt Emacs 25.

Thanks, martin

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