bug#16306: 24.3.50; font change creates blank column on Lucid

[Eli Zaretskii]

> Date: Tue, 31 Dec 2013 18:48:57 +0900
> From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> Cc: 16306@debbugs.gnu.org
> 
> >>>>> On Tue, 31 Dec 2013 10:05:33 +0200, Eli Zaretskii <eliz@gnu.org> said:
> 
> >> 1. $ emacs -Q &
> >> 2. (set-frame-font "Courier-18") C-j
> >> 
> >> Then a blank column is created on the right edge of the frame (i.e.,
> >> to the right of the right fringe).
> >> 
> >> I can reproduce it if Emacs is compiled with the Lucid widgets
> >> support, but not for GTK+ or non-toolkit builds.
> 
> > Is the frame resized as result of changing the font, or do the frame
> > dimensions stay fixed?
> 
> Resized.  Evaluation of (frame-pixel-width) gives different results
> between Lucid and non-toolkit:
> 
> Lucid, showing blank column:
> (list (frame-width) (frame-pixel-width)) => (80 674)
> (set-frame-font "Courier-18")
> (list (frame-width) (frame-pixel-width)) => (79 1162)
> 
> Non-toolkit, not showing blank column:
> (list (frame-width) (frame-pixel-width)) => (80 674)
> (set-frame-font "Courier-18")
> (list (frame-width) (frame-pixel-width)) => (80 1166)

Thanks.  Can you show the screenshot of the problem, with some text
nearby to allow to judge the size of the blank column?