From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: sds@gnu.org, 12251@debbugs.gnu.org
Subject: bug#12251: 24.2.50; crash in note_mouse_highlight
Date: Fri, 24 Aug 2012 11:44:57 +0200 [thread overview]
Message-ID: <50374D19.3020201@gmx.at> (raw)
In-Reply-To: <836289a1pz.fsf@gnu.org>
>> The error was obviously thrown from Lisp which per se is harmless. But
>> I'm quite convinced that it was thrown by a Lisp function directly or
>> indirectly called from C.
>
> Why do you think that?
An error with code attempting to operate on a dead window within
"normal" Lisp is a strange case. It can be due to users leaving a
dangling reference to such a window somewhere in their code but I doubt
that many people do that. And when such an error happens, there is no
reason why it should expand into a crash. The (implicit) invariants of
a window tree should not be violated by Elisp code.
OTOH, calling an Elisp function from C in a state where the window tree
invariants are temporarily violated can easily lead to a crash.
>> How could we explain a crash if it's all within Lisp code?
>
> It's not within Lisp anymore; the error throws to top-level, and Emacs
> tries to read input, at which time it gets a mouse event.
That would be a _very_ strange coinicidence.
martin
prev parent reply other threads:[~2012-08-24 9:44 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-21 18:20 bug#12251: 24.2.50; crash in note_mouse_highlight Sam Steingold
2012-08-21 18:42 ` Eli Zaretskii
2012-08-21 19:02 ` Sam Steingold
2012-08-21 19:22 ` Eli Zaretskii
2012-08-22 2:43 ` Sam Steingold
2012-08-22 17:09 ` Eli Zaretskii
2012-08-22 17:29 ` Sam Steingold
2012-08-22 21:12 ` Sam Steingold
2012-08-23 8:48 ` martin rudalics
2012-08-23 13:19 ` Sam Steingold
2012-08-23 17:18 ` martin rudalics
2012-08-24 20:33 ` Sam Steingold
2012-08-25 13:40 ` martin rudalics
2012-08-27 19:01 ` Sam Steingold
2012-08-27 19:05 ` Sam Steingold
2012-08-27 21:10 ` martin rudalics
2012-08-28 16:35 ` Sam Steingold
2012-08-28 17:05 ` martin rudalics
2012-08-29 9:34 ` martin rudalics
2012-08-29 14:42 ` Sam Steingold
2012-08-30 8:03 ` martin rudalics
2012-08-30 11:02 ` Sam Steingold
2012-09-01 9:36 ` Eli Zaretskii
2012-09-05 19:56 ` Sam Steingold
2012-09-06 2:31 ` Sam Steingold
2012-09-06 3:13 ` Sam Steingold
2012-09-06 5:15 ` Werner LEMBERG
2012-09-06 5:04 ` Eli Zaretskii
2012-09-06 7:20 ` martin rudalics
2012-09-06 7:32 ` martin rudalics
2012-08-30 12:39 ` Sam Steingold
2012-08-30 12:49 ` martin rudalics
2012-09-01 9:40 ` Eli Zaretskii
2012-08-23 16:20 ` Eli Zaretskii
2012-08-23 17:19 ` martin rudalics
2012-08-23 18:43 ` Eli Zaretskii
2012-08-24 9:44 ` martin rudalics [this message]
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