Java target error use lib hxbit

1 
/*var bm = new BMsg(1, "test", ["xxx" => "yyy"]);
        var s:Serializer = new Serializer();
        var bs:Bytes = s.serialize(bm);
        
        var c:String = bs.toHex();
        
        File.saveContent("c:/xxx.txt", c);
    */
        var c:String = "01010574657374020478787804797979";
        
        var bs:Bytes = Bytes.ofHex(c);
        
        var s:Serializer = new Serializer();
    var bs =	s.unserialize(bs, BMsg);
    
    trace(bs);//error.

///////////////////////////////
class BMsg implements Serializable
{

    @:s public var reqType:Int;
    @:s  public var apiEnum:String;
    @:s public var map:Map<String,String>;

    public function new (rt:Int, api:String, map:Map<String,String>){
	
	this.reqType = rt;
	this.apiEnum = api;
	this.map = map;
}
}

///////////////////

I want post this issue to hxbit ,but it’s was close by ncannasse

and also got the same error

it’s seem haxe still not fixed this bug.

haxe 4.0 rc3