Is it a bug ?

[Du Liang]

import std.stdio;

class A{
	int x;
	struct AS{int y;}
}
class B:A{ }

void main(){
	B:A.AS   as1;   /// : : : : ? ? ?   B : A . AS ??
	as1.y = 100;
	writeln(as1.y);
	A.AS   as2;
	as2.y = 200;
	writeln(as2.y);
	readln();
}