GNU bug report logs - #42653
28.0.50; scroll-margin is sometimes ignored with hl-line/display-line-numbers-mode

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Kevin Liu <kevin <at> nivekuil.com>
Cc: 42653 <at> debbugs.gnu.org
Subject: bug#42653: 28.0.50; scroll-margin is sometimes ignored with hl-line/display-line-numbers-mode
Date: Mon, 03 Aug 2020 05:28:19 +0300

> From: Kevin Liu <kevin <at> nivekuil.com>
> Cc: 42653 <at> debbugs.gnu.org
> Date: Sun, 02 Aug 2020 13:24:34 -0700
> 
> 1. If (hl-line-mode 1), then scrolling down as you reach EOB will
> continue "collapsing" the margin, moving the cursor but not scrolling
> beyond EOB, until it hits the actual EOB line.  At that point,
> scroll-margin will again take effect and the screen will suddenly scroll
> down by scroll-margin lines (7 in my case).  This seems like a bug,
> off-by-one maybe?
> 
> 2. The intended behavior of disabling the bottom margin as EOB
> approaches seems to only apply when (hl-line-mode 1) or
> (display-line-numbers-mode 1).  This means that enabling these modes
> still affects scrolling behavior, which I think is fundamentally
> unexpected.

Please show a test case for each of these two, as I don't think I've
seen them in my testing.

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