bug#20072: Incorrect popup showing

[Eli Zaretskii]

> Date: Sat, 14 Mar 2015 20:05:34 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 20072@debbugs.gnu.org
> 
> > From: Nikolay Puzanov <punzik@gmail.com>
> > Date: Fri, 13 Mar 2015 17:53:48 +0000
> > Cc: 20072@debbugs.gnu.org
> > 
> > Switch to emacs-lisp-mode.
> > Below the cursor should be a few lines of text.
> 
> OK, I see the problem now (some corruption happens even without
> linum-mode, btw).  But I have trouble debugging it: the problematic
> display disappears the moment I type anything, even "M-x".  This makes
> debugging next to impossible.
> 
> So I need a simpler example, one that will produce the problematic
> display and not disappear.  I tried to prepare such an example, but
> failed, which isn't surprising, as I know almost nothing about the
> packages involved.  Can you guys help me with that?

Ping!  Anyone out there interested enough in this bug to help me solve
it?  Please?