Are void arrays usable ?

[badlink via Digitalmars-d-learn]

Hello,
I just discovered this strange behavior:

struct A {
   void[10] x; // OK, compiles fine
}
class B {
   void[10] x; // Error: void does not have a default initializer
               // ! note, the message come without any line 
indication !
}

Does this mean that void arrays are a thing or it is a bug ?