Hirohito Higashi wrote:

> Hi, Manuel and Vimmers.
> 
> 2013/7/3(Wed) 0:27:51 UTC+9 Manuel Ortega:
> > On Tue, Jul 2, 2013 at 3:44 AM, Kazunobu Kuriyama <[email protected]> 
> > wrote:
> > 
> > 
> > That said, the vim shipped with MacOS X 10.8.4, the version of which
> > is 7.3 and looks no patch applied, not linked against X11, works
> > well.  This suggests that the early patch-levels of 7.3 are free
> > from this particular bug.
> > 
> > Did my earlier message not go through?  I bisected.  The offending
> > commit is 7.3.859.  7.3.858 is just fine on OSX 10.8.4.
> > 
> > I see this in iTerm.app with xterm-256color, and in Terminal.app
> > with xterm-256color.
> > 
> > If I switch it to "xterm" or "xterm-16color", the bug goes away.
> > If I switch it to "xterm-color" the bug reappears.
> > 
> > -Manny
> 
> Thank you for your investigation.
> 
> My investigation result:
> I reproduced.
> 7.3.1287 on fedora 17 via PuTTY(term=putty-256color).
> 
> If may_req_ambiguous_character_width() function call is commented, then This 
> regression is not occurred.
> (main.c: 815)

I can reproduce it even when the may_req_ambiguous_character_width()
stuff is skipped.  That's when using an xterm and t_Co is different from
the expected value, causing a redraw.

I'm working on a patch, but it's grown a bit large...

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