From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: michael_heerdegen@web.de, 34179@debbugs.gnu.org
Subject: bug#34179: 27.0.50; message hangs when buffer with process visible
Date: Fri, 25 Jan 2019 11:36:24 +0100 [thread overview]
Message-ID: <5C4AE6A8.9030006@gmx.at> (raw)
In-Reply-To: <83y37959hp.fsf@gnu.org>
>> If I replace the line
>>
>> (with-selected-window (window-normalize-window window t)
>>
>> of 'window-max-chars-per-line' by the line
>>
>> (with-current-buffer (window-buffer window)
>>
>> the problem persists. So it is not the 'select-window' call per se
>> that causes the trouble.
>
> That's because both selecting a window and changing its buffer sets
> windows_or_buffers_changed via redisplay_other_windows.
But ‘with-current-buffer’ does not change a window's buffer. Or what
am I missing?
>> The problem is with having that separate frame that gets its echo
>> area resized.
>
> What separate frame?
The one from Michael's scenarios. As in
I can provoke the hang in emacs -Q by just doing M-x shell, C-x 5 2,
and M-: (message "A\nB").
I can't get the hang with a single frame. Can you?
>> Using 'window-size-change-functions' (patch attached) instead of
>> 'window-configuration-change-hook' fixes the problem here.
>
> That might be a good change anyway, but the more general problem of
> having an easily triggered infloop in redisplay_internal remains, and
> we should fix that, IMO.
It's an infloop triggered in ‘window-configuration-change-hook’ and it
was always easy to trigger an infloop there. Obviously, resizing the
minibuffer window did not trigger `window-configuration-change-hook'
at all before my change.
> Let me turn the table and ask: why do we need to retry redisplay when
> some function called from run_window_change_functions does something
> that requires redisplay? Why not leave that to the next redisplay
> cycle?
Bug#34138 is one example why redisplay should be triggered from within
a function on 'window-configuration-change-hook'.
martin
next prev parent reply other threads:[~2019-01-25 10:36 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-23 15:10 bug#34179: 27.0.50; message hangs when buffer with process visible Michael Heerdegen
2019-01-23 16:29 ` Eli Zaretskii
2019-01-24 13:19 ` Michael Heerdegen
2019-01-24 13:35 ` Michael Heerdegen
2019-01-24 14:39 ` Eli Zaretskii
2019-01-24 14:58 ` Michael Heerdegen
2019-01-24 15:04 ` Michael Heerdegen
2019-01-24 15:25 ` Michael Heerdegen
2019-01-24 15:36 ` Michael Heerdegen
2019-01-24 16:05 ` martin rudalics
2019-01-24 18:22 ` Michael Heerdegen
2019-01-24 18:33 ` martin rudalics
2019-01-24 18:36 ` Eli Zaretskii
2019-01-24 18:51 ` martin rudalics
2019-01-24 18:59 ` Eli Zaretskii
2019-01-24 19:20 ` Michael Heerdegen
2019-01-24 18:55 ` Michael Heerdegen
2019-01-24 18:47 ` Michael Heerdegen
2019-01-24 19:21 ` Eli Zaretskii
2019-01-24 19:49 ` Eli Zaretskii
2019-01-25 9:44 ` martin rudalics
2019-01-25 10:15 ` Eli Zaretskii
2019-01-25 10:36 ` martin rudalics [this message]
2019-01-25 13:32 ` Eli Zaretskii
2019-01-25 16:51 ` martin rudalics
2019-01-25 17:22 ` martin rudalics
2019-01-26 12:58 ` Michael Heerdegen
2019-01-26 15:09 ` martin rudalics
2019-01-26 18:48 ` martin rudalics
2019-01-27 14:22 ` Michael Heerdegen
2019-01-28 18:38 ` martin rudalics
2019-01-30 22:29 ` Michael Heerdegen
2019-01-31 8:32 ` martin rudalics
2019-01-31 14:06 ` Eli Zaretskii
2019-01-31 18:44 ` martin rudalics
2019-01-31 20:10 ` Eli Zaretskii
2019-02-01 9:04 ` martin rudalics
2019-01-31 14:44 ` Michael Heerdegen
2019-02-02 9:28 ` martin rudalics
2019-02-04 23:35 ` Michael Heerdegen
2019-02-19 8:39 ` martin rudalics
2019-01-25 18:31 ` Eli Zaretskii
2019-01-25 18:54 ` martin rudalics
2019-01-25 19:48 ` Eli Zaretskii
2019-01-24 15:46 ` martin rudalics
2019-01-24 14:32 ` Eli Zaretskii
2019-01-24 14:41 ` Michael Heerdegen
2019-01-24 14:49 ` Michael Heerdegen
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