TikZ crosses-decoration does not work

Question

When trying to compile the examples from the manual like

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{decorations.pathmorphing}
\begin{document}
\tikz \fill [decorate,decoration={crosses}] [fill=blue!20,draw=blue,thick] (0,0) -- (2,1) arc (90:-90:.5) -- cycle;
\end{document}

all I receive is

! Package pgfkeys Error: I do not know the key '/pgf/decoration/\pgfkeyscurrent
name ' and I am going to ignore it. Perhaps you misspelled it.

Is my tikz installation missing something or what do I do to make this work? The library is there (else I suppose the would be an error) and zigzag for instance is working.

Answer 1

The compilable snippet is:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{decorations.shapes}
\begin{document}
\tikz \fill [decorate,decoration={crosses}] [fill=blue!20,draw=blue,thick] (0,0) -- (2,1) arc (90:-90:.5) -- cycle;
\end{document}

The decorations.shapes dependency is not directly documented in the example, but if you look carefully you'll notice that the crosses decoration is the first decoration introduced in the "TikZ Library decorations.shapes" section (Section 48.5.3, pag. 598) ;)