/pgf/foreach/count is unscoped

[hmenke]

The count variable in \foreach seems to be unscoped unlike the list variable.

\documentclass{article}
\usepackage{pgffor}
\begin{document}
Testing the acute accent í í í ...
\show\listitem\show\i
\foreach \listitem [count=\i] in {1,...,4} {x}
\show\listitem \show\i
Testing the acute accent í í í ...
\end{document}

> \listitem=undefined.
l.6 \show\listitem
                  \show\i
? 
> \i=macro:
->\OT1-cmd \i \OT1\i .
l.6 \show\listitem\show\i
                         
? 
> \listitem=undefined.
l.8 \show\listitem
                   \show\i
? 
> \i=macro:
->4.
l.8 \show\listitem \show\i
                          
? 

Using pdflatex this results in:

Thanks @u-fischer for the original report: https://chat.stackexchange.com/transcript/message/50829169#50829169

[hmenke]

Fixed in 7fbaa86.
Let's see how hard it breaks.