GNU bug report logs -
#17392
24.3.90; cursor blinks faster and faster
Previous Next
Reported by: michael_heerdegen <at> web.de
Date: Sat, 3 May 2014 01:45:02 UTC
Severity: normal
Found in version 24.3.90
Done: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Bug is archived. No further changes may be made.
Full log
Message #83 received at 17392 <at> debbugs.gnu.org (full text, mbox):
> From: Michael Heerdegen <michael_heerdegen <at> web.de>
> Cc: 17392 <at> debbugs.gnu.org
> Date: Sun, 11 May 2014 13:09:30 +0200
>
> This count should always be <= 1, right? With the advices, I was
> interested in the first time when the count is > 1, i.e., when the state
> switched from sane to pathological.
>
> And I found that the count was > 1 for the first time after
> `timer-event-handler' had been called (from C). Before that call the
> count had still been 1. And I know why the count increased: namely because
> the timer object that timer-event-handler was called with was not
> present (referable) from the Lisp level at that point of time. But
> another (equal, but not eq) timer was present in timer-idle-list.
>
> Due to lack of C knowledge, I can't interpret that result. But it shows
> that the C level is definitely involved, and the bug is not in timer.el,
> at least, not only.
The C level is definitely involved, because it is the one which
actually runs the timers. But is the C level involved in the bug?
I'm not sure, as I saw no evidence to that effect yet.
> Summa summarum: no, I don't know if this `timer-event-handler' call from
> C is unkosher, but it is the mechanism that leads to successive
> additions of blink-cursor-start timers to timer-idle-list.
The blink-cursor-start timers are added by blink-cursor-check, so
perhaps the problem is there? E.g., it doesn't check timer-idle-list,
it only checks that blink-cursor-idle-timer is nil.
The function blink-cursor-check is called from two places:
post-command-hook and handle-focus-in (via focus-in-hook). Could it
be that in your scenario two timers are started due to this?
This bug report was last modified 11 years and 61 days ago.
Previous Next
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.