bug#24638: 24.5; Line numbers disappear on empty lines if fill column indicator enabled and the indicator is outside the visible buffer area

[Eli Zaretskii]

> From: Kristóf Katus <kristof.katus@gmail.com>
> Date: Fri, 7 Oct 2016 16:50:14 +0200
> 
> 1. Start a graphical emacs:
> $ emacs -Q
> 
> 2. Open a new buffer, type some text leaving some lines blank
> 
> 3. Enable linum-mode: 
> M-x linum-mode
> 
> 4. Fetch, then load fill-column-indicator.el by: 
> M-x load-file 
> 
> 5. Enable fci-mode: 
> M-x fci-mode
> 
> 6. Decrease the window width, so that the fill column indicator is not shown
> 
> Observed behaviour
> 
> On all the empty lines, the line numbers disappear -- except on that empty 
> line where your cursor might rest.
> 
> Expected behaviour
> 
> Line numbers should be shown on all lines, including empty lines independent 
> of the visibility of the fill column
> indicator.

Please bring this first to the attention of the developers of
fill-column-indicator.el.  I'm not at all sure this is a core Emacs
problem.

Thanks.