Bug: Crash: nested interfaces

[JS]

module main;
import std.stdio, std.cstream;

interface A : A.B
{
	interface B { }
}

int main(string[] argv)
{
     return 0;
}


One can argue about the validity of the code, I tried it to 
created logical heirarchy of interfaces.

e.g., instead of interface Name : NameExtension; interface 
NameExtension; I wanted Name.Extension for NameExtension. This 
would make it easier logically nest interfaces(it would be better 
to not use "." though).

In any case, regardless, it causes dmd 2.062 to crash.