An accumulate with more than one binding is wrongly generated in the executable model

 @Test
public void testAccumulateWithManyBindings() {
    String str =
            "import " + Person.class.getCanonicalName() + ";\n" +
            "rule R when\n" +
            "  accumulate (\n" +
            "       Person($age : age, $name : name), $max : max( $name.length() ) " +
            "         )" +
            "then\n" +
            "  insert($max);\n" +
            "end";

    KieSession ksession = getKieSession( str );

    ksession.insert( new Person( "Mario", 40 ) );
    ksession.insert( new Person( "Mark", 40 ) );
    ksession.insert( new Person( "Luca", 40 ) );

    ksession.fireAllRules();

    List<Number> results = getObjectsIntoList(ksession, Number.class);
    assertEquals(1, results.size());
    assertEquals(5, results.get(0).intValue());
}