data members of Interface by value type not correctly unmarshaled in JavaScript

[pepone]

// Slice
interface RangerAccessRequest
{
    RangerAccessResource getResource();
}
class RangerAccessResult
{
    RangerAccessRequest request;
}

// JavaScript
Test.RangerAccessResult = class extends Ice.Value
{
    constructor(request = null)
    {
        super();
        this.request = request;
    }

    _iceWriteMemberImpl(ostr)
    {
        ostr.writeValue(this.request);
    }

    _iceReadMemberImpl(istr)
    {
        istr.readValue(obj => this.request = obj, Test.RangerAccessRequest);
    }
};

The generated method for read RangerAccessResult is bogus, it is traying to read an object of type RangerAccessRequest but it should instead try to read an Ice.Value