bug#5378: arbitrary user parameters in default-frame-alist not set in subsequent frames

bug#5378: arbitrary user parameters in default-frame-alist not set in subsequent frames

[Juanma Barranquero]

---------- Forwarded message ----------
From: Juanma Barranquero <lekktu@gmail.com>
Date: Sun, Jan 3, 2010 at 00:35
Subject: Is this a bug? (arbitrary user parameters in
default-frame-alist not set in subsequent frames)
To: Emacs developers <emacs-devel@gnu.org>


I'll file a bug report, assuming it is unexpected.

 emacs -Q --eval "(add-to-list 'default-frame-alist '(my-parameter . t))"
 M-: (frame-parameter nil 'my-parameter)   =>   t
 C-x 5 2
 M-: (frame-parameter nil 'my-parameter)   =>   nil

This happens for user-defined frame parameters; for example, if you
set `background-color' it is correctly passed.

Are initial-frame-alist and default-frame-alist intended for
"meaningful" stuff (X resources and other things that can affect frame
creation) only, or should user values be honored too?

   Juanma

bug#5378: arbitrary user parameters in default-frame-alist not set in subsequent frames

[Chong Yidong]

> emacs -Q --eval "(add-to-list 'default-frame-alist '(my-parameter . t))"
> M-: (frame-parameter nil 'my-parameter)   =>   t
> C-x 5 2
> M-: (frame-parameter nil 'my-parameter)   =>   nil

I have checked in a fix that tweaks the way default-frame-alist is
handled during frame creation.  It should solve this problem.