\draw circle[radius=rand]; gives ellipses

[TorbjornT]

This was reported in https://tex.stackexchange.com/questions/389920/tikz-drawviolet-0-0-circle-rand2-is-an-oval#comment1296666_512741, and as requested by Henri I'm making a bug report.

My guess was that because radius sets x radius and y radius separately, they get different random numbers, and hence you get an ellipse with \draw circle[radius=rand];.

\documentclass[tikz]{standalone}    
\begin{document}
\begin{tikzpicture}
\draw[help lines,step=0.5] (-1,-1) grid (1,1);
\foreach \x in {0,...,10}
   \draw[violet] circle[radius=rand];

\node [fill=white,above right] at (-1,-1) {\tiny\pgfversion};
\end{tikzpicture}
\end{document}

[hmenke]

This is actually a combination of two race conditions. I've fixed it on my own branch but I'll wait for the CI before merging.