bug#20265: 24.5; Corrupted mode-line with :box attribute set

[Nick Helm <nick@tenpoint.co.nz>]

;; Start emacs in a new GUI frame with
;; /Applications/Emacs.app/Contents/MacOS/Emacs -Q

;; In *scratch* use C-x C-e to set the mode-line face :box
;; attribute to something ridiculous but easy to see.

(set-face-attribute 'mode-line nil :box '(:line-width 15))

;; Notice the obscured coding system flag in the mode-line. Mouse
;; over the mode-line and observe the mode-line status flags become
;; visually corrupted.

;; Further, turn off the mode-line's 3D effects by setting :box 
;; atttributes.

(set-face-attribute 'mode-line nil :box nil)

(set-face-attribute 'mode-line-highlight nil :box nil)

;; Mouse over the mode-line and observe the unexpected
;; mode-line-highlight face.

;; Note that this is reproducible in 24.4.



In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
of 2015-04-06 on builder10-9.porkrind.org
Windowing system distributor `Apple', version 10.3.1344
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_NZ.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Messages

Minor modes in effect:
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
kill-region: The mark is not set now, so there is no region
Making completion list...

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
help-fns mail-prsvr mail-utils help-mode easymenu time-date tooltip
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment
lisp-mode prog-mode register page menu-bar rfn-eshadow timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese hebrew greek romanian slovak czech european ethiopic
indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple
abbrev minibuffer nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
cocoa ns multi-tty emacs)

Memory information:
((conses 16 72722 6054)
(symbols 48 17296 0)
(miscs 40 45 125)
(strings 32 9891 4431)
(string-bytes 1 261763)
(vectors 16 9011)
(vector-slots 8 372503 18503)
(floats 8 55 250)
(intervals 56 241 25)
(buffers 960 12))