Is This a Bug

[Andrew Wiley]

Is this a bug, or is my understanding of shared/synchronized still broken:

module test;

synchronized class Bob {
private:
int _i;
 invariant() { // test.d(7): Error: function test.Bob.__invariant () shared
is not callable using argument types ()
 assert(_i == 5);
}
 public:
this() {
_i = 5;
}
 @property
int i() {
 return _i;
}
}