GNU bug report logs - #19464
24.4; Customizing either scroll-step or scroll-conservatively makes Emacs hang up when calling set-window-vscroll with large values

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Vasilij Schneidermann <v.schneidermann <at> gmail.com>
Cc: 19464 <at> debbugs.gnu.org
Subject: bug#19464: 24.4; Customizing either scroll-step or scroll-conservatively makes Emacs hang up when calling set-window-vscroll with large values
Date: Tue, 01 Jun 2021 08:04:13 +0200

Vasilij Schneidermann <v.schneidermann <at> gmail.com> writes:

> Yes, I do. My reproducer relies on having a file spanning more than a
> screenful open.
>
> - Run `emacs -Q`
> - Paste the following code block into the scratch buffer
> - Evaluate with `M-x buffer`

Did you mean `M-x eval-buffer'?

> (find-library "subr")
> (setq scroll-conservatively 10000)
> (set-window-vscroll nil 9000 t)

If so, I'm still not able to reproduce the problem on this
Debian/bullseye laptop -- `M-x eval-buffer' here takes less than half a
second for me in Emacs 28 and Emacs 27.1.

What Emacs/OS versions are you using?  And are there any missing steps
in the recipe?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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