--- Begin Message ---
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Subject: |
24.0.93; redisplay glitch with before-string and display overlays |
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Date: |
Mon, 27 Feb 2012 23:04:03 +0100 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.93 (gnu/linux) |
1. emacs -Q
2. Type `C-x b a RET' to get a fresh buffer in Fundamental mode, and at
(point-min) type "012".
3. Type `M-<' so that the cursor is over (i.e. just before) `0'.
4. Type `M-: (overlay-put (make-overlay (point) (point)) 'before-string
"*")'. Now you see this:
*012
5. Type `M-: (overlay-put (make-overlay (point) (1+ (point))) 'display
"")'. Now you see this:
*12
6. Type `M-: (remove-overlays)' to restore "012".
7. Type SPC to advance the cursor and the start of "012" to column one.
8. Repeat step 4. Now you see this:
*012
9. Repeat step 5. Now you see this:
*112
According to my tests, this redisplay glitch happens when the overlays
begin anywhere other than (point-min). It also only happens when the
before-string overlay is added prior to the display string overlay, and
only when the value of the display string is "". I don't know when this
problem appeared, but it does not happen in Emacs 23.3.
In GNU Emacs 24.0.93.1 (i686-suse-linux-gnu, GTK+ Version 2.24.7)
of 2012-02-26 on escher
Windowing system distributor `The X.Org Foundation', version 11.0.11004000
Configured using:
`configure '--without-toolkit-scroll-bars' 'CFLAGS=-g''
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: en_US.UTF-8
value of $XMODIFIERS: @im=local
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
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--- Begin Message ---
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Subject: |
Re: bug#10903: 24.0.93; redisplay glitch with before-string and display overlays |
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Date: |
Wed, 29 Feb 2012 19:52:17 +0200 |
> From: Stephen Berman <address@hidden>
> Cc: address@hidden
> Date: Tue, 28 Feb 2012 23:25:13 +0100
>
> > Since Savannah is on the move, I cannot commit the fix, but perhaps
> > you could test it locally and see if there are any leftovers. Here's
> > the patch:
>
> I applied the patch and rebuilt, and the redisplay glitches I observed
> are gone; thanks very much for the quick fix! I consider this bug
> resolved, but it should probably be closed after the fix is committed to
> the trunk. Thanks again.
Thanks for testing. I committed the fix (revision 107465 on the
trunk) and closed the bug.
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