Stack overflow when trying to convert arrays to Integer

I've experienced som stack overflows using WebWork2 lately, and found that this has been due to an error in my form handling that uncovered a bug in XWorkBasicConverter. This bug can easily be reproduced by posting a form with a hidden-element associated with the same parameter name as the post action. E.g:

<form action="someAction?id=1>
<input type="hidden" name="id" value="2"/>
</form>

If someAction has setId(Integer id), then ParametersInterceptor will try to convert the id parameter ([1, 2]) into an Integer using XWorkBasicConverter. The interesting lines in XWorkBasicConverter are:

– snip —
if ((array != null) && (array.length == 1)) {
value = array[0];
}

// let's try to convert the first element only
result = this.convertValue(context, o, member, s, value, toType);

– snip —

Since the array is of size 2, value is not set to array[0] and the last line is not executed as the comment indicates. It just calls itself recursively with the same parameters each time leading to a stack overflow.