Acces Violation: assert with null instance

[Lionello Lunesu]

I really think this used to work (like in C++) :

#class Class {}
#void main(){
#    Class c;
#    assert(c);
#}

With 1.0, I get an access violation in 
_D9invariant12_d_invariantFC6ObjectZv, but why? I have to rewrite it as 
assert(c !is null), but I don't recall having to do this before....

L.