private function getAnonymFct() : Function
{
    return function () : void
    {
        var num : uint = -1;

        if( num < uint.MIN_VALUE )
            trace( "WTF ??" );
        trace( getQualifiedClassName( num ) );
        trace( num );
    }
}

public function Main()
{
    getAnonymFct()();
}

int
WTF ??
-1