bug#21177: 25.0.50; full width glyph breaks display in terminal

[Mark Oteiza]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Mark Oteiza <mvoteiza@udel.edu>
>> Date: Sat, 01 Aug 2015 15:16:47 -0400
>> 
>> I have found a couple recipes that put display out of whack in
>> terminals. So far I have tried xterm, gnome-terminal, as well as screen
>> and tmux in each. From emacs -nw -Q:
>> 
>> 1. M-x load-theme RET somebuiltintheme RET
>> 2. Paste some full width glyph, e.g. 数 ツ
>> 3. Put point on the glyph
>> 4. C-u C-x =
>> 
>> Point moves after the glyph, the buffer seems to narrow, sometimes the
>> modeline gets doubled.
>> 
>> Another similar thing seems to be:
>> 
>> 1. M-x load-theme RET somebuiltintheme RET
>> 2. C-x 8 RET HIRAGANA TAB … (complete to something) RET
>> 
>> Here's the result after this second recipe https://i.imgur.com/HXyfX5l.png
>
> Do the problems go away if you turn off auto-composition-mode?

Nope