--- Begin Message ---
Subject: |
23.1.50; empty string not allowed as line-prefix |
Date: |
Sat, 21 Nov 2009 12:01:02 +0100 |
It seems that an empty string as a line prefix makes the redisplay
engine choke.
Test case:
- open a new buffer in fundamental mode, no auto-fill-mode
- insert a long line that will be wrapped for display into two or more
lines.
- insert the following form into the buffer, after the long line
(add-text-properties (point-min) (point) '(line-prefix ""))
- evaluate this form
Expected result: No change in display
Actual result: The formerly wrapped line is no longer wrapped but
displayed as if truncate-lines had been set (it is not set)
I suspect that the empty string causes the problem. A nil line-prefix
property, or a non-empty string both work fine.
It is possible (likely?) that the same error also occurs with
wrap-prefix, but I have not tested this.
If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
`bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/Users/dominik/lib/git/emacs-new/etc/DEBUG.
In GNU Emacs 23.1.50.2 (i386-apple-darwin9.8.0, X toolkit, Xaw3d
scroll bars)
of 2009-11-20 on carsten-dominiks-macbook-pro.local
Windowing system distributor `The X.Org Foundation', version
11.0.10402000
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
value of $XMODIFIERS: nil
locale-coding-system: nil
default enable-multibyte-characters: t
Major mode: Fundamental
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show-paren-mode: t
iswitchb-mode: t
diff-auto-refine-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
global-auto-composition-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
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e <tab> t t t . o r g <return> <return> <return> <return>
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f SPC a l k f j SPC l a k j f SPC a l k j f SPC a l
k j f SPC a l k j f h SPC a l k f j SPC a l k j f h
SPC a l k j f SPC a l k f j h SPC a l k f j h SPC a
l k j f h SPC a l k j f h SPC l a k j f SPC l a k j
f h SPC l a k j s f h SPC l a k j s f h SPC l k a j
s h f SPC l k j SPC <up> <up> <up> C-d C-d C-d <down>
<down> <return> ( a d d - t e x M-/ <escape> <tab>
t - p r o p e r t i e s SPC ( p o i n t - m i n ) SPC
( p o i n t ) SPC ' ( l i n e - p r e f i x SPC " "
) ) C-x C-e <up> <up> <down> <down> <up> <left> <down>
C-a C-SPC C-e <escape> w M-x s u b m i t - b u <tab>
<backspace> <tab> <backspace> <tab> <tab> <escape>
<tab> C-a C-k <tab> C-x o C-x o C-s - b u g C-s C-s
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<mouse-2>
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custom widget hashtable-print-readable backquote make-network-process
font-render-setting x-toolkit x multi-tty emacs)
--- End Message ---
--- Begin Message ---
Subject: |
Re: 23.1.50; empty string not allowed as line-prefix |
Date: |
Sat, 05 Dec 2009 17:49:39 -0500 |
> - open a new buffer in fundamental mode, no auto-fill-mode
> - insert a long line that will be wrapped for display into two or more
> lines.
> - insert the following form into the buffer, after the long line
>
> (add-text-properties (point-min) (point) '(line-prefix ""))
>
> - evaluate this form
>
> Expected result: No change in display
> Actual result: The formerly wrapped line is no longer wrapped but
> displayed as if truncate-lines had been set (it is not set)
I've checked in a fix. Thanks.
--- End Message ---