ArrayStoreException when invoking XmlObject.selectPath()

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I've been getting some ArrayStoreException errors when invoking the selectPath() method in an XmlObject subclass. Tracking the traceback exception I noticed that this occurs in the XmlObjectBase._typedArray() method, when the input array argument has a XmlAnyTypeImpl object and the System.arraycopy is invoked.

I'm failing to understand what's the need of having a _typedArray() because apparently it can't handle XmlAnyTypeImpl classes and every class (including the XmlAnyTypeImpl class) implements the XmlObject interface.

Given that both selectPath(String,XmlOptions) and execQuery(String,XmlOptions) return a XmlObject[] and these are invokers of the _typedArray() method, what is the need for a method that crashes and apparently is redundant?

Cheers,
Celso