this still compiles and runs.
I would expect to report
"undefined identifier std"
when compiling B.d

however if "private import std.string;"
is declared inside the body of class A
compilation fails with
"B.d(7): undefined identifier std"
which is an improvement from
previous versions!

######################### A.d
private import std.string;
private import B;
class A
{
	void a()
	{
		printf("A test toString for 1 = %.*s\n",std.string.toString(1));
	}
}

void main()
{
	A a = new A;
	a.a();
	B b = new B;
	b.b();
}
######################### B.d
private import A;

class B
{
	void b()
	{
		printf("B test toString for 1 = %.*s\n",std.string.toString(1));
	}
}
#########################
$ dmd A B -I~/dmd/src/phobos
gcc A.o B.o -o A -lphobos -lpthread -lm
$ A
A test toString for 1 = 1
B test toString for 1 = 1
#########################

Ant