bug#27427: 26.0.50; Native line numbers lead to display error in company-mode popup

[martin rudalics]

> Without going into details, how do I figure out the width which line
> number glyphs are taking up? Any way to do that without calling
> posn-at-point at the beginning-of-visual-line?

You'd probably need a function ‘window-line-number-width’ callable after
the current glyph matrix was calculated.  But if your overlays then mess
with the number of lines displayed in the window you'll get into a loop.

martin