GNU bug report logs - #23546
25.1.50; scroll-restore-mode breaks comint-mode

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From: Dmitry Alexandrov <321942 <at> gmail.com>
To: 23546 <at> debbugs.gnu.org
Subject: bug#23546: 25.1.50; scroll-restore-mode breaks comint-mode
Date: Sun, 15 May 2016 22:25:44 +0300

Hello.

I encountered a problem that looks like a bug to me: scroll-restore-mode
(from elpa.gnu.org [0]) breaks comint-mode (built-in, GNU Emacs 25.1.50.1).

[0] https://elpa.gnu.org/packages/scroll-restore.html

Steps to reproduce in a clear environment:

$ mkdir /tmp/emacs.d
$ emacs --quick --eval '(setq user-emacs-directory "/tmp/emacs.d")'

(package-initialize)
(package-refresh-contents)
(package-install 'scroll-restore)
(setq scroll-restore-jump-back t)
(scroll-restore-mode 1)

M-x shell

Now I can type the first command (c d RET), start to type the second one
— and the point jumps before shell prompt:

user <at> local:~$ cd¦
cd¦user <at> local:~$

(here ‘¦’ denotes cursor position)

I could move point back to the end manually (with M-> for instance), but
that is pretty annoying.

I have to mention that it would not present a huge problem if there were
a way disable scroll-restore-mode on per-major-mode basis.  However
scroll-restore-mode has only global state, no buffer-local, as far as I
can see.

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