bug#13559: 24.3.50; mysterious, uncalled-for point movement when exit minibuffer

bug#13559: 24.3.50; mysterious, uncalled-for point movement when exit minibuffer

[Drew Adams]

Sorry, but I cannot give a recipe to repro this yet.
 
Somehow, it is suddenly the case (with my setup, but only with
recent builds, perhaps just the latest I have, 2013-01-25 -
that's where I noticed it) that with even something as simple as
M-x forward-char or M-: (forward-char), and even if I use C-g to
cancel such (e.g., just M-x C-g), point gets moved to another
location.  I need not hit C-g - the same thing happens with
M-x forward-char RET.
 
The location seems unpredictable, and I don't know what makes it change.
It is not the mark, in any case.  And this happens even with Icicle mode
turned off (I mention that because Icicles has its own M-x and M-:.)
 
And it doesn't matter how I set point - mouse-1 or C-f etc.
And it does not matter whether I set mark at point.  Something makes
exiting from the minibuffer warp point to another location.
The target location stays the same, but something (dunno what)
can make it change to a different mysterious location.
 
If I scroll the window so the mysterious target location is off
window, the cursor still gets warped to it (and thus the window is
scrolled to show it).
 
HTH.  Sorry I don't have more info about this yet.
Anyone else seeing anything like this?
 
In GNU Emacs 24.3.50.1 (i386-mingw-nt5.1.2600)
 of 2013-01-25 on ODIEONE
Bzr revision: 111604 eliz@gnu.org-20130125143821-1ykj7ia1qjojjjnp
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --with-gcc (4.7) --no-opt --enable-checking --cflags
 -IC:/Devel/emacs/build/include --ldflags -LC:/Devel/emacs/build/lib'
 

bug#13559: 24.3.50; mysterious, uncalled-for point movement when exit minibuffer

[Eli Zaretskii]

> From: "Drew Adams" <drew.adams@oracle.com>
> Date: Sat, 26 Jan 2013 09:44:33 -0800
> 
> Sorry, but I cannot give a recipe to repro this yet.
>  
> Somehow, it is suddenly the case (with my setup, but only with
> recent builds, perhaps just the latest I have, 2013-01-25 -
> that's where I noticed it) that with even something as simple as
> M-x forward-char or M-: (forward-char), and even if I use C-g to
> cancel such (e.g., just M-x C-g), point gets moved to another
> location.  I need not hit C-g - the same thing happens with
> M-x forward-char RET.

Can you try reproducing this from "emacs -Q"?

I'm guessing that some redisplay change made lately goofed, but it's
hard to look for it without a recipe.

bug#13559: 24.3.50; mysterious, uncalled-for point movement when exit minibuffer

[Drew Adams]

> > Sorry, but I cannot give a recipe to repro this yet.
> >  
> > Somehow, it is suddenly the case (with my setup, but only with
> > recent builds, perhaps just the latest I have, 2013-01-25 -
> > that's where I noticed it) that with even something as simple as
> > M-x forward-char or M-: (forward-char), and even if I use C-g to
> > cancel such (e.g., just M-x C-g), point gets moved to another
> > location.  I need not hit C-g - the same thing happens with
> > M-x forward-char RET.
> 
> Can you try reproducing this from "emacs -Q"?

No, I don't think so.  Not until I find out more about it.  If & when I do, I'll
let you know.

> I'm guessing that some redisplay change made lately goofed, but it's
> hard to look for it without a recipe.

With luck more people will run into it and we'll learn more.  Sooner or later we
will perhaps be able to repro it simply, from emacs -Q.

For now, the bug report is just a heads-up.  Perhaps it will help as is, ringing
a bell for someone who made recent changes.  So far, I've seen this in a build
from 1/25, but not yet in a build from 1/22.  (Doesn't mean I won't encounter it
with 1/22, just saying that's what I've seen so far.)

bug#13559: 24.3.50; mysterious, uncalled-for point movement when exit minibuffer

[Lars Ingebrigtsen]

"Drew Adams" <drew.adams@oracle.com> writes:

>> > Sorry, but I cannot give a recipe to repro this yet.
>> >  
>> > Somehow, it is suddenly the case (with my setup, but only with
>> > recent builds, perhaps just the latest I have, 2013-01-25 -
>> > that's where I noticed it) that with even something as simple as
>> > M-x forward-char or M-: (forward-char), and even if I use C-g to
>> > cancel such (e.g., just M-x C-g), point gets moved to another
>> > location.  I need not hit C-g - the same thing happens with
>> > M-x forward-char RET.
>> 
>> Can you try reproducing this from "emacs -Q"?
>
> No, I don't think so.  Not until I find out more about it.  If & when I do, I'll
> let you know.

That was a year ago, so I'm closing this bug.  Please reopen if further
progress can be made.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/