GNU bug report logs - #31440
Can't redefine parent-frame on NS

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Alan Third <alan <at> idiocy.org>
To: bug-gnu-emacs <at> gnu.org
Subject: Can't redefine parent-frame on NS
Date: Sun, 13 May 2018 10:40:54 +0100

[Message part 1 (text/plain, inline)]

from emacs -Q:

set up three frames, a, b and c:

    (set-frame-parameter c 'parent-frame a)

c becomes child of a.

(set-frame-parameter c 'parent-frame b)

expected: c becomes child of b and is no longer child of a.

actual: c remains child of a, and b now cannot be raised above a and b.

(set-frame-parameter c 'parent-frame nil)

expected: c ceases to be a child frame.

actual: emacs crashes.



Patch attached.

If this is too late for 26.1 I don’t think that will be a huge issue
as it seems redefining parent-frame is not something people want to
do, and it’s unlikely to be something a user does by accident.
-- 
Alan Third

[0001-Fix-redefinition-of-child-frames-on-NS.patch (text/plain, attachment)]

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