bugs in Eric's implementation of RDF shapes

I'm getting what appear to be incorrect results.

For example:

Constraints:


prefix : <http://example.org/>

<FooShape> {
     :patron @<BarShape> {2,2}
}

<BarShape> {
     :patron @<FooShape> {2,2}
}


Data:

@prefix : <http://example.org/> .

<Foo> :patron <Bar>, <Foo>, <XXX> .
<Bar> :patron <XXX> .
<XXX> :patron <Foo> .


Results in everything matching everything.


Are there known problems with this implementation?

peter