typecons wrap error

[Oleg B]

What I do wrong?

[code]
import std.stdio, std.typecons;

interface A
{
     void foo();
     void bar( int );
}

class B
{
     void foo() { writeln( "B.foo" ); }
     void bar( int i ) { writefln( "B.bar(%d)", i ); }
}

void call( A a )
{
     a.foo();
     a.bar( 12 );
}

void main()
{
     auto b = new B;
     A a = wrap!A(b);
     call( a );
}
[/code]

then I run dmd, it fails with error

$ dmd -run tcons.d
tcons.o: In function 
`_D3std8typecons19__T4wrapTC5tcons1AZ19__T4wrapTC5tcons1BZ4Impl587__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b305d2e747970652920666f6f28506172616d65746572547970655475706c6521285461726765744d656d626572735b305d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e666f6f28666f72776172642161726773293b207dVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ300__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ3barMFiZv':
tcons.d:(.text._D3std8typecons19__T4wrapTC5tcons1AZ19__T4wrapTC5tcons1BZ4Impl587__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b305d2e747970652920666f6f28506172616d65746572547970655475706c6521285461726765744d656d626572735b305d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e666f6f28666f72776172642161726773293b207dVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ300__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ3barMFiZv+0x54): 
undefined reference to 
`_D3std8typecons19__T4wrapTC5tcons1AZ19__T4wrapTC5tcons1BZ4Impl587__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b305d2e747970652920666f6f28506172616d65746572547970655475706c6521285461726765744d656d626572735b305d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e666f6f28666f72776172642161726773293b207dVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ300__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ3barMFiZv990__T7forwardS974_D3std8typecons19__T4wrapTC5tcons1AZ19__T4wrapTC5tcons1BZ4Impl587__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b305d2e747970652920666f6f28506172616d65746572547970655475706c6521285461726765744d656d626572735b305d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e666f6f28666f72776172642161726773293b207dVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ300__T8mixinAllVAyaa139_6f766572726964652052657475726e5479706521285461726765744d656d626572735b315d2e74797065292062617228506172616d65746572547970655475706c6521285461726765744d656d626572735b315d2e7479706529206172677329207b2072657475726e205f777261705f736f757263652e62617228666f72776172642161726773293b207dZ3barMFiZv8_param_0iZ8__T3fwdZ3fwdMFNbNdNfZi'
collect2: error: ld returned 1 exit status
--- errorlevel 1