Bug with new TikZ 3.1

[quark67]

See description here: https://tex.stackexchange.com/q/469477/132405
Additional text is added in output and pie is shifted to right far away.

[TorbjornT]

Seems to be caused by the \def\color... in \setcolor. Find&replace all occurrences of \color in pgf-pie.sty with something like \pie@color, and it works fine with pgf 3.1.

[hmenke]

The PR is merged and the issues should be fixed on the new upstream at https://github.com/pgf-tikz/pgf-pie