bug#15684: 24.3.50; `set-frame-parameter' broken for parameter `minibuffer'

[Drew Adams]

emacs -Q

C-x 5 2

M-: (pp-eval-expression '(frame-parameters))

Value of parameter `minibuffer' is a window.

M-: (set-frame-parameter nil 'minibuffer t)

M-: (pp-eval-expression '(frame-parameters))

Value of parameter `minibuffer' is unchanged: still the window.
Should be t.

M-: (set-frame-parameter nil 'minibuffer nil)

Value of parameter `minibuffer' is unchanged: still the window.
Should be nil.

M-x set-variable default-frame-alist

((tool-bar-lines . 0)
 (menu-bar-lines . 1)
 (minibuffer))

C-x 5 2

The new frame is created without a minibuffer, as it should be.  Check
it with `M-: (pp-eval-expression '(frame-parameters))', with that frame
selected.

M-: (set-frame-parameter nil 'minibuffer t)

M-: (pp-eval-expression '(frame-parameters))

Value of parameter `minibuffer' is unchanged: still nil.  Should be t.

See Subject line. 



In GNU Emacs 24.3.50.1 (i686-pc-mingw32)
 of 2013-10-19 on LEG570
Bzr revision: 114715 rgm@gnu.org-20131019023520-s8mwtib7xcx9e05w
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --enable-checking 'CFLAGS=-O0 -g3' CPPFLAGS=-DGLYPH_DEBUG=1'