bug#22319: 25.1.50; Emacs hangs when pasting in xml file (+ flyspell-mode)

[Alexis]

Jan Synacek <jsynacek@redhat.com> writes:

> Steps to reproduce: 1) C-x C-f foo.xml 2) M-x flyspell-mode 3) 
> Then paste in the following: <?xml version="1.0" 
> encoding="UTF-8"?> <Simulation> 
>       <compare> 
>         <data>fullprint1</data> 
>       </compare> <!-- <compare> 
>         <data>fullprint2</data> 
>       </compare> --> 
> </Simulation> 4) Go to the line with fullprint2: 
>    C-k C-k 
> 5) Go to the line after fullprint1: 
>    C-y At this point, emacs hangs, eating all of my CPU.
>
> The tested version is the current upstream master (commit 
> 61e83e9).

Reproduced on Debian Jessie x86_64, master commit 6a311d20.