bug#16870: 24.3; "display" text property versus ":box" face attribute

[Ben Liblit]

If a range of text carries the "display" text property and also has its 
"face" text property set to something with the ":box" attribute, then 
the right edge of the box is not actually drawn.  The following elisp 
code fragment demonstrates the problem:

    (let ((buffer (generate-new-buffer "*bug*")))
      (set-buffer buffer)
      (insert "lorem ipsum dolor\n\nlorem ipsum dolor\n")
      (put-text-property 7 12 'display "xxxxx")
      (put-text-property 7 12 'face '(:box t))
      (put-text-property 26 31 'face '(:box t))
      (switch-to-buffer-other-window buffer))

Observe that on the first line, the displayed "xxxxx" replacement text 
has only three box edges drawn: top, left, and bottom.  The right edge 
is missing.  By contrast, the second line of text has no "display" text 
property set and shows a proper box with all four edges.


In GNU Emacs 24.3.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.18.9)
 of 2013-06-10 on mcgee.cs.wisc.edu
Windowing system distributor `Red Hat, Inc.', version 11.0.11300000
System Description:     Red Hat Enterprise Linux Server release 6.5 (Santiago)

Configured using:
 `configure '--prefix=/unsup/emacs-24.3/amd64_rhel6' '--without-pop'
 '--without-sound' '--with-gif=no''

Important settings:
  value of $LC_CTYPE: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Fundamental

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

Recent input:
C-y C-x C-e <help-echo> M-x r e p o r t - e m <tab>
<return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark set
#<buffer *bug*>

Load-path shadows:
None found.

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