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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Chong Yidong <cyd@stupidchicken.com>,
	8219@debbugs.gnu.org, emacs-devel@gnu.org
Subject: bug#8219: Effect of deletions on indirect buffers (Bug#8219)
Date: Fri, 11 Mar 2011 18:19:25 -0500	[thread overview]
Message-ID: <jwv1v2dxn68.fsf-monnier+emacs__4899.43256038732$1299886831$gmane$org@gnu.org> (raw)
In-Reply-To: <838vwlto85.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 11 Mar 2011 22:07:54 +0200")

> This makes a lot of sense, but your description seems to point out
> that the implementation does not behave according to the docs: if
> markers are (or should be) relocated in sync as result of insertion
> and deletion, the same should happen with PT, BUF_BEGV, etc.

Actually, indirect buffers keep their point and narrowing in real
markers.  So when they get "active" the BUF_PT, BUF_ZV, etc... get
updated, but until that time, BUF_PT and friends may hold invalid data.
I.e. any place where we use BUF_PT on something else than
current_buffer, we have a bug waiting to happen unless we know for sure
that that buffer is not indirect.


        Stefan





  parent reply	other threads:[~2011-03-11 23:19 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <877hc5bfqy.fsf@stupidchicken.com>
2011-03-11 20:07 ` bug#8219: Effect of deletions on indirect buffers (Bug#8219) Eli Zaretskii
     [not found] ` <838vwlto85.fsf@gnu.org>
2011-03-11 20:58   ` Chong Yidong
2011-03-11 23:19   ` Stefan Monnier [this message]
     [not found]   ` <874o79nzla.fsf@stupidchicken.com>
2011-03-12  8:15     ` Eli Zaretskii
     [not found]   ` <jwv1v2dxn68.fsf-monnier+emacs@gnu.org>
2011-03-12  9:01     ` Eli Zaretskii
     [not found]     ` <83wrk4soee.fsf@gnu.org>
2011-03-12 20:47       ` Stefan Monnier
     [not found]       ` <jwvipvooyog.fsf-monnier+emacs@gnu.org>
2011-03-13 16:30         ` Chong Yidong
     [not found]         ` <yyx4o77asos.fsf@fencepost.gnu.org>
2011-03-13 17:09           ` Chong Yidong
2011-03-13 22:29         ` Chong Yidong
     [not found]         ` <87wrk2vemq.fsf@stupidchicken.com>
2011-03-14  2:41           ` Juanma Barranquero
     [not found]           ` <AANLkTim1+q+a4ZFa2SZVcc51KE=v5GSJM9oTUT5yXoCh@mail.gmail.com>
2011-03-14 16:18             ` Chong Yidong
2011-03-10 20:24 bug#8219: 23.3; Crash in indirect buffer Chong Yidong
2011-03-11 19:48 ` bug#8219: Effect of deletions on indirect buffers (Bug#8219) Chong Yidong
2011-03-19 16:44 ` Chong Yidong

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