What does the following program do?

[Shachar Shemesh]

import std.algorithm: move;
import std.stdio;
import std.string;

class A {
     int val;

     override string toString() const {
         return "A(%s)".format(val);
     }
}

struct B {
     int val;
}

void main() {
     B b = B(12);
     B* bp = &b;
     B* bp2;

     writefln("bp=%s bp2=%s", bp, bp2);
     move( bp, bp2 );
     writefln("bp=%s bp2=%s", bp, bp2);

     A a1 = new A();
     a1.val = 42;
     A a2;

     writefln("a1=%s (%s) a2=%s (%s)", a1, cast(void*)a1, a2, 
cast(void*)a2);
     move( a1, a2 );
     writefln("a1=%s (%s) a2=%s (%s)", a1, cast(void*)a1, a2, 
cast(void*)a2);

     B b2;
     writefln("b=%s b2=%s", b, b2);
     move( b, b2 );
     writefln("b=%s b2=%s", b, b2);
}

Answer:
bp=7FFFAB559970 bp2=null
bp=7FFFAB559970 bp2=7FFFAB559970
a1=A(42) (7FD1B79E9000) a2=null (null)
a1=A(42) (7FD1B79E9000) a2=A(42) (7FD1B79E9000)
b=B(12) b2=B(0)
b=B(12) b2=B(12)

"move" was supposed to initialize "source" to init. This does not appear 
to be the case. Is that a bug? Where?