* disturbing, hard-to-catch redisplay bug
@ 2002-12-09 23:49 John Wiegley
2002-12-10 11:38 ` Kim F. Storm
2002-12-10 21:30 ` Richard Stallman
0 siblings, 2 replies; 3+ messages in thread
From: John Wiegley @ 2002-12-09 23:49 UTC (permalink / raw
Well, I have seen this twice now, but I can't catch it. If I
restart my Emacs clean, the problem doesn't appear. It only happens
if I've been using Emacs for a while.
I did, however, at least capture it visually. These two images show
the bug:
In the first, I am editing a list of filenames:
http://www.gci-net.com/~johnw/root1.jpg.bz2
Now I press M-} to advance to the next whitespace line, at which
point it "appends" to the end of my lines with content from the new
buffer location:
http://www.gci-net.com/~johnw/root2.jpg.bz2
This is not real, however, as C-l (or any other redisplaying event)
will cure it. I *have* moved, but the text of my new location does
not start at column 0, but rather is at the end of the visual lines
from my previous location -- at least until the next redisplay.
I hope the pictures will trigger someone's memory. As I said,
changing my environment in any significant way causes the bug to
fade away.
I only see this when my screen is split. A one-window display does
not have the problem. A three-window display only has the problem
in the "half frame height weight" (i.e., the display you get after
pressing C-x 2 twice from a full frame). If I balance the
three-window display, the problem does not appear.
Very odd,
John
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: disturbing, hard-to-catch redisplay bug
2002-12-09 23:49 disturbing, hard-to-catch redisplay bug John Wiegley
@ 2002-12-10 11:38 ` Kim F. Storm
2002-12-10 21:30 ` Richard Stallman
1 sibling, 0 replies; 3+ messages in thread
From: Kim F. Storm @ 2002-12-10 11:38 UTC (permalink / raw
Cc: emacs-devel
John Wiegley <johnw@gnu.org> writes:
> Well, I have seen this twice now, but I can't catch it. If I
> restart my Emacs clean, the problem doesn't appear. It only happens
> if I've been using Emacs for a while.
>
> I did, however, at least capture it visually. These two images show
> the bug:
>
> In the first, I am editing a list of filenames:
>
> http://www.gci-net.com/~johnw/root1.jpg.bz2
Why did you bzip the jpg files? My browser doesn't grook that, so
I didn't look at the images. You can use inline images too.
Anyway, RMS fixed a bug yesterday which was related to positioning the
cursor at the end of the second last visible line on a window when it
should actually have been on the first char of the last visible line
of that window. Could be related...
--
Kim F. Storm <storm@cua.dk> http://www.cua.dk
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: disturbing, hard-to-catch redisplay bug
2002-12-09 23:49 disturbing, hard-to-catch redisplay bug John Wiegley
2002-12-10 11:38 ` Kim F. Storm
@ 2002-12-10 21:30 ` Richard Stallman
1 sibling, 0 replies; 3+ messages in thread
From: Richard Stallman @ 2002-12-10 21:30 UTC (permalink / raw
Cc: emacs-devel
Can you give specifically precise directions that we could reproduce it?
It is ok if we have to load a file of Lisp code in order to do so.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2002-12-09 23:49 disturbing, hard-to-catch redisplay bug John Wiegley
2002-12-10 11:38 ` Kim F. Storm
2002-12-10 21:30 ` Richard Stallman
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