GNU bug report logs - #30432
26.0.91; freeze when text wrap-prefix exceeds window text width

Previous Next

Full log

View this message in rfc822 format

From: Paul Rankin <hello <at> paulwrankin.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 30432 <at> debbugs.gnu.org
Subject: bug#30432: 26.0.91; freeze when text wrap-prefix exceeds window text width
Date: Tue, 13 Feb 2018 15:57:16 +1000

On 13 Feb 2018, at 3:15 pm, Eli Zaretskii <eliz <at> gnu.org> wrote:
> 
>> From: Paul Rankin <hello <at> paulwrankin.com>
>> Date: Tue, 13 Feb 2018 12:15:17 +1000
>> Cc: 30432 <at> debbugs.gnu.org
>> 
>> Sorry I didn't include my system before:
>> 
>> macOS High Sierra 10.13.3 (17D47)
>> MacBook Pro (Retina, 15-inch, Mid 2015)
>> Emacs.app built from emacs-26 branch
> 
> Yes, I tried the emacs-26 branch as well.  What I reported was from
> that branch's build.
> 
>> It's definitely a freeze. Emacs becomes unresponsive and needs to be force quit.
> 
> Did you try C-g 2 or 3 times?  If so, did it help?

Yep, C-g many times but no help.

>> I can understand that the real-world use case might not make sense to your own use of Emacs, but in the use I described, it means Emacs freezes by just changing the font size... not good.
> 
> I agree the result is not good even if Emacs behaves like it does on
> my system, which is not a total freeze.  I'll try to see if I can find
> some reasonable way out of this situation.

A few more bits of info:

- I think the freeze is entirely temporary, however the time frozen *seems* to increase linearly depending on the number of offending lines, so a buffer with only one or two extending lines might recover in a second or two, but a buffer with many offending lines will appear permanently frozen.

- Move attempted point motion on offending lines appears to prolong the freeze.

- The freeze will be very minimal (a second or two) if point skips over the wrap-prefix text entirely, e.g. apply wrap-prefix to lines in the middle of buffer, then M-> to eobp.

- No freeze occurs if point is at eobp and moves back to bobp with M-< in the same circumstances as above.

- The freeze will occur if the wrapped text is scrolled into view from below, e.g. same circumstances as above, move point to eobp then mouse wheel up.

- When point moves to an affected position and things become frozen, the line number in the mode line will display as "??"

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.