bug#23065: 24.5; OS X 10.11 delete-frame fullscreen frame causes segfault

[Saulius Menkevičius]

Hi,

I can confirm I had this on 24.x and that this sequence no longer
crashes emacs 25 (pretest).

-Saulius

Trey Ethan Harris <trey@cpan.org> writes:

> To reproduce:
>
> 0. Run "Emacs.app/Contents/MacOS/Emacs -Q".
> 1. Create a second frame (with make-frame or other method)
> 2. Make the frame fullscreen using the green titlebar fullscreen button
> 3. Delete the new fullscreen frame using delete-frame or other method
> (including clicking the red titlebar close button).
>
> Expected result: Frame deleted, prior frame refocused, Emacs continues
> running
> Actual result: Frame deleted, then segmentation fault
>
> I have done some additional differential diagnosis that may be helpful:
>
> 1. This only occurs with OS X El Capitan (10.11) and later—which
> rewrote fullscreen support to support Split View, so I suspect the
> new interaction is to blame.
> 2. I have tested other Cocoa builds of Emacs 24 such as emacsforosx, and
> they
> also exhibit this behavior. (I have not tested Emacs 25.)
> 3. I have had others, including non-Emacs users, reproduce the bug, in
> one case on an otherwise clean install of OS X.
>
>
>
>
>
> In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
>  of 2015-04-10 on builder10-9.porkrind.org
> Windowing system distributor `Apple', version 10.3.1404
> Configured using:
>  `configure --with-ns '--enable-locallisppath=/Library/Application
>  Support/Emacs/${version}/site-lisp:/Library/Application
>  Support/Emacs/site-lisp''
>
> Important settings:
>   value of $LANG: en_US.UTF-8
>   locale-coding-system: utf-8-unix