Mapping Maps with custom mapping configuration leads to empty result objects

[maybeec]

I have configured the following Custom Mapping to map
Map<Long, CustomObj1> to Map<Long, CustomObj2>
as property of a custom object:

<mapping>
    <class-a>objectA</class-a>
    <class-b>objectB</class-b>

    <field>
        <a>mapField</a>
        <b>mapField</b>
        <a-hint>CustomObj1</a-hint>
        <b-hint>CustomObj2</b-hint>
    </field>
</mapping>

Interestingly I get the result CustomObj2 object with all properties filled with null. I debuged into the code and observed a bug, I will fix soon and provide a pull request. In this special case, a new instance of the target b-hint will be created and mapped, but the mapped object reference get lost in the code.