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variable width space display property value has no effect in empty overl


From: Kevin Rodgers
Subject: variable width space display property value has no effect in empty overlay
Date: Tue, 10 Jun 2003 09:57:20 -0600 (MDT)

This bug report will be sent to the Free Software Foundation,
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Please write in English, because the Emacs maintainers do not have
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and to the gnu.emacs.bug news group.

In GNU Emacs 21.3.1 (i386-pc-solaris2.7, X toolkit)
 of 2003-04-24 on briard
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

emacs-21.3.1 -q --no-site-file
M-<
C-e
M-: (let ((lbp (line-beginning-position))) (overlay-put (make-overlay lbp lbp) 
'display '(space :align-to 4)))

That creates an overlay spanning 0 characters at the beginning of the
*scratch* buffer, with the display property set to (space :align-to 4).
But the buffer display is not affected.

Recent input:
g i n n i n g - p o s i t i o n ) ) ) SPC ( o v e r 
l a y - p u t SPC ( m a k e - o v e r l a y SPC l b 
p SPC l b p ) SPC ' d i s p l a y SPC ' ( s p a c e 
SPC : a l i g n - t o SPC 4 ) ) ) <return> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <menu-bar> <help-menu> 
<report-emacs-bug>

Recent messages:
(/usr/local/emacs-21.3/src/emacs-21.3.1 -q --no-site-file)
Loading tool-bar...done
Loading image...done
Loading tooltip...done
For information about the GNU Project and its goals, type C-h C-p.
Mark set
(space :align-to 4)
Loading emacsbug...done





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