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bug#11417: 24.0.96; infinite looping in xdisp.c
From: |
Eli Zaretskii |
Subject: |
bug#11417: 24.0.96; infinite looping in xdisp.c |
Date: |
Thu, 10 May 2012 20:43:26 +0300 |
> From: Leo <sdl.web@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>, 11417@debbugs.gnu.org
> Date: Thu, 10 May 2012 17:15:40 +0800
>
>
> [1:text/plain Hide]
>
> On 2012-05-08 11:37 +0800, Chong Yidong wrote:
> > I also am puzzled by where the display string "!" causing the problem
> > comes from. The only appearance of a "!" in Flymake is applied to the
> > mode-line, not as a display string within the buffer text. Neither
> > Flymake nor Python mode seem to use overlay display strings.
> >
> > Do you have any idea what "!" is used for in your buffer?
>
> Just realised this was triggered by me patching flymake to support
> fringe indicator.
That was the crucial missing link in this mystery.
> OK, I have prepared a test case. It requires python and the package
> pyflakes¹ which is used by flymake. Normally one can install pyflakes by
> using:
>
> pip install pyflakes
> OR
> easy_install pyflakes
>
> in a terminal.
>
> Decompress the attached tar ball and go into the directory 11417/ in a
> terminal and launch emacs like this:
>
> emacs -nw -q -L . -l bug.el setup.py
>
> You should see a buffer with contents partially displayed. Move around
> in that buffer by typing C-v, M-v, C-n or C-p until it freezes (it
> usually takes me no more than 3 key strokes).
Thanks. Now that I know how you patched flymake, I can reproduce this
with a much simpler recipe:
emacs -Q -nw
C-x C-f xdisp.c RET
M-: (let ((ov (make-overlay 4928 4933 nil t t)) (fringe (propertize "!"
'display (list 'left-fringe 'question-mark)))) (overlay-put ov 'before-string
fringe)) RET
(The last one is a single long line to type into the minibuffer.)
Redisplay only shows part of the screen after that, but Emacs doesn't
yet infloop. Move a cursor a bit, and it will.
Of course, the choice of the file (xdisp.c) and the position where to
put the overlay are arbitrary.
This only happens in 'emacs -nw", a GUI session (which can actually
display the fringe bitmap) doesn't have any problems with this recipe.
I will work on fixing this.
- bug#11417: 24.0.96; infinite looping in xdisp.c, (continued)
- bug#11417: 24.0.96; infinite looping in xdisp.c, Chong Yidong, 2012/05/06
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/06
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/07
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/07
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/07
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/07
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/07
- bug#11417: 24.0.96; infinite looping in xdisp.c, Chong Yidong, 2012/05/07
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/08
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/10
- bug#11417: 24.0.96; infinite looping in xdisp.c,
Eli Zaretskii <=
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/10
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/11
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/12
- bug#11417: 24.0.96; infinite looping in xdisp.c, Chong Yidong, 2012/05/12
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/13
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/13
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/13
- bug#11417: 24.0.96; infinite looping in xdisp.c, Leo, 2012/05/15
- bug#11417: 24.0.96; infinite looping in xdisp.c, Eli Zaretskii, 2012/05/15