bug#23993: 25.0.91; cursor vanishes at prompt

[Alan Third <alan@idiocy.org>]

On Sat, Jul 16, 2016 at 12:11:11AM +0900, David Reitter wrote:
> The following configuration makes the cursor vanish when at the end of a *shell* buffer.
> 
> Emacs -Q
> (shell)
> ;; evaluate this somewhere:
> (set-face-attribute 'comint-highlight-prompt nil :height 100)
> 
> Select the window with the *shell* buffer, maybe press Enter to add a line with a prompt.
> 
> In practice, this occurs in a more complex configuration, too - in other comint buffers, and with various font height configurations, or with fonts enlarged via face-remapping-alist.   This is happens all the time in the Aquamacs configuration.
> 
> I think it’s new in -25, but I haven’t checked.

I can confirm I can see it in the master branch, and Emacs 24.5 does
display the cursor.

I only see this in the NS port.

It looks like the cursor isn't drawn when the line height is less than
the cursor height, or something.
-- 
Alan Third