From: charles@aurox.ch (Charles A. Roelli)
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: 17893@debbugs.gnu.org
Subject: bug#17893: 24.4.50; (error "Marker does not point anywhere")
Date: Tue, 14 Nov 2017 20:56:58 +0100 [thread overview]
Message-ID: <m2lgj8ws51.fsf@aurox.ch> (raw)
In-Reply-To: <jwvbmk7tdpq.fsf-monnier+emacsbugs@gnu.org> (message from Stefan Monnier on Sun, 12 Nov 2017 16:03:09 -0500)
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Drew Adams <drew.adams@oracle.com>, 17893@debbugs.gnu.org
> Date: Sun, 12 Nov 2017 16:03:09 -0500
>
> > The error happens when the marker at the head of the mark ring no
> > longer points into a buffer.
>
> Hmm... mark-ring is buffer-local, so the marks in there should all point
> to current-buffer. Can you try and figure out why this is not the case?
I was not careful to make sure that the mark-ring contains valid
markers, so it may be an error in my code. On the other hand, looking
at the definition of `clone-buffer' (which my patch uses), I don't see
anything that would update the markers of the mark-ring in the newly
cloned buffer to point to the new buffer instead of the old one.
Maybe that is also a problem? And it doesn't help that I find my code
incredibly hard to read one month on...
Drew's problem is probably related to clone-buffer, especially seeing
as he saw the issue right after having hit M-n in an Info mode buffer:
M-n runs the command clone-buffer (found in Info-mode-map), which is
an interactive compiled Lisp function in ‘simple.el’.
It is bound to M-n, <menu-bar> <Info> <Clone Info buffer>.
(clone-buffer &optional NEWNAME DISPLAY-FLAG)
Ah, turns out that's how you replicate this bug.
1. C-h i
2. Click/drag a few times in the *info* buffer to set some marks
3. M-n C-x o C-x k RET
4. Click in the remaining *info*<2> buffer:
set-transient-map PCH: (error "Marker does not point anywhere")
next prev parent reply other threads:[~2017-11-14 19:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-01 21:10 bug#17893: 24.4.50; (error "Marker does not point anywhere") Drew Adams
2014-07-01 22:42 ` Stefan Monnier
2014-07-02 1:17 ` Drew Adams
2014-07-02 2:11 ` Stefan Monnier
2014-07-02 2:49 ` Drew Adams
2014-07-02 14:09 ` Stefan Monnier
2014-07-02 14:22 ` Drew Adams
2014-07-02 14:58 ` Stefan Monnier
2014-07-02 16:08 ` Drew Adams
2014-07-02 18:24 ` Stefan Monnier
2014-07-02 18:39 ` Drew Adams
2014-07-02 18:58 ` Stephen Berman
2014-07-15 16:19 ` Drew Adams
2017-11-12 10:41 ` Charles A. Roelli
2017-11-12 21:03 ` Stefan Monnier
2017-11-14 19:56 ` Charles A. Roelli [this message]
2017-11-14 20:08 ` Stefan Monnier
2017-11-19 19:31 ` Charles A. Roelli
2017-11-20 15:45 ` Eli Zaretskii
2017-11-20 16:51 ` Stefan Monnier
2017-11-20 17:55 ` Eli Zaretskii
2017-11-20 18:59 ` Stefan Monnier
2017-11-20 19:32 ` Eli Zaretskii
2017-11-20 19:49 ` Andreas Schwab
2017-11-20 20:01 ` Charles A. Roelli
2017-11-20 20:29 ` Eli Zaretskii
2017-11-24 20:18 ` Charles A. Roelli
2017-11-24 20:39 ` Eli Zaretskii
2017-11-25 14:13 ` Charles A. Roelli
2017-11-25 16:06 ` Eli Zaretskii
2017-11-25 16:48 ` Stefan Monnier
2017-11-25 17:20 ` Eli Zaretskii
2017-11-25 18:30 ` Andreas Schwab
2017-11-25 19:23 ` Eli Zaretskii
2017-11-25 20:47 ` Andreas Schwab
2017-11-26 10:26 ` martin rudalics
2017-11-26 16:07 ` Eli Zaretskii
2017-11-27 8:50 ` martin rudalics
2017-11-27 9:54 ` Andreas Schwab
2017-11-27 10:02 ` martin rudalics
2017-11-24 21:22 ` Stefan Monnier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=m2lgj8ws51.fsf@aurox.ch \
--to=charles@aurox.ch \
--cc=17893@debbugs.gnu.org \
--cc=monnier@iro.umontreal.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.