bug#20847: [display engine] 25.0.50; company-mode popup makes point jump to an entirely different location

[Dmitry Gutov]

On 07/01/2015 05:42 AM, Eli Zaretskii wrote:

> Yes, but that's not the situation we are talking about.  We are
> talking about point being _covered" by an overlay string that ends in
> a newline.

Fair point.

> I meant only in this special situation.

It will be a big hack: just look at the huge predicate we'll need to 
detect it. This situation is not special from the standpoint of the 
underlying logic.

Anyway, I'm inclining toward revisiting the fix for #18285, and doing a 
smaller hack: using `display' normally, and only resorting to 
`invisible' + `after-string' when the overlay is empty.

I'll report how it goes.