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From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: enometh@meer.net, 39977@debbugs.gnu.org
Subject: bug#39977: 28.0.50; Unhelpful stack trace
Date: Wed, 18 Mar 2020 19:48:10 +0100	[thread overview]
Message-ID: <bc03fa9f-9792-6de8-ff5b-53f4b099296c@gmx.at> (raw)
In-Reply-To: <83imj1g1eu.fsf@gnu.org>

 > So we are talking about :eval in mode-line-format (and similar
 > variables)?

I am but I might be wrong.  Maybe Madhu can tell us where that window
quitting operation is issued.

 > I'm not sure we can detect these actions reliably, as Lisp code can be
 > very complex.  I think we can only handle the consequences of those
 > actions.

We already disallow deleting the last live or visible frame and the last
window on a frame.  So the redisplay code, whenever it runs Lisp in
between, could simply set a boolean that will disallow deleting any
window or frame as well as setting the window configuration and other
dangerous operations that implicitly might kill a window or a buffer.

 > Which is why I proposed to deal with that in SELECTED_FRAME
 > (we could, of course, find some other place where the disastrous
 > results of such code can be detected).

SELECTED_FRAME does not necessarily have to abort.  It could return some
other live frame, maybe selecting it on-the-fly, in the hope that the
configuration stabilizes sooner or later.  But this doesn't help with
the fact that such an :eval can do a lot more nasty things like deleting
windows or killing buffers.

martin






  reply	other threads:[~2020-03-18 18:48 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-07 17:43 bug#39977: 28.0.50; Unhelpful stack trace Madhu
2020-03-07 18:50 ` Eli Zaretskii
2020-03-13  9:55   ` Eli Zaretskii
2020-03-13 16:28     ` martin rudalics
2020-03-13 19:43       ` Eli Zaretskii
2020-03-14  8:48         ` martin rudalics
2020-03-14 10:10           ` Eli Zaretskii
2020-03-14 10:37             ` martin rudalics
2020-03-14 18:55               ` martin rudalics
2020-03-14 20:09                 ` Eli Zaretskii
2020-03-15 17:49                   ` martin rudalics
2020-03-15 18:41                     ` Eli Zaretskii
2020-03-16  9:24                       ` martin rudalics
2020-03-16 15:33                         ` Eli Zaretskii
2020-03-17  9:38                           ` martin rudalics
2020-03-17 15:51                             ` Eli Zaretskii
2020-03-17 17:31                               ` martin rudalics
2020-03-17 17:45                                 ` Eli Zaretskii
2020-03-17 18:39                                   ` martin rudalics
2020-03-17 19:41                                     ` Eli Zaretskii
2020-03-18  9:12                                       ` martin rudalics
2020-03-18 14:53                                         ` Eli Zaretskii
2020-03-18 18:48                                           ` martin rudalics [this message]
2020-03-18 19:36                                             ` Eli Zaretskii
2020-03-19  8:55                                               ` martin rudalics
2020-03-19 14:33                                                 ` Eli Zaretskii
2020-03-21  9:32                                                   ` martin rudalics
2020-03-21 13:15                                                     ` Eli Zaretskii
2020-03-22 18:20                                                       ` martin rudalics
2020-03-23 14:48                                                         ` Eli Zaretskii
2020-03-24  9:45                                                           ` martin rudalics
2020-03-28  8:23                                                             ` Eli Zaretskii
2020-03-28 18:38                                                               ` martin rudalics
2020-04-03 16:32                                                                 ` martin rudalics
2020-04-10 11:51                                                                   ` Madhu
2020-09-30 15:06                                                                   ` Lars Ingebrigtsen
2020-09-30 15:31                                                                     ` Eli Zaretskii
2020-09-30 17:29                                                                       ` martin rudalics
2020-10-01  0:01                                                                         ` Lars Ingebrigtsen
2020-10-01  4:37                                                                           ` Madhu
2020-03-19  3:48                                             ` Madhu
2020-03-16  2:42                     ` Madhu
2020-03-16  9:25                       ` martin rudalics

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