TypeUtils.isAssignable returns a wrong result for ParameterizedType when raw class is "Class".

class TestIF<T> {
}
class TestImpl<T> extends TestIF<T> {
}
class TestImpl2<R> extends TestIF<Number> {
} 

Class<? extends TestIF<?>> a1 = null;
Class<TestIF> b1 = null;
a1 = b1; //compile error

Class<? extends TestIF<?>> a2 = null;
Class<TestImpl> b2 = null;
a2 = b2;  //compile error

Class<? extends TestIF<Number>> a3 = null;
Class<TestImpl2> b3 = null;
a3 = b3;  //compile error 

TypeVariable<?> typeVar1 = TestIF.class.getTypeParameters()[0];
ParameterizedType topre1 = TypeUtils.parameterize(TestIF.class, TypeUtils.wildcardType().build());
Type to1 = TypeUtils.parameterize(Class.class, TypeUtils.wildcardType().withUpperBounds(topre1).build());
Type from1 = TypeUtils.parameterize(Class.class,  TypeUtils.parameterize(TestIF.class,typeVar1) );
boolean result1 = TypeUtils.isAssignable(from1, to1);
System.out.println("from : " + from1.toString() + " : to : " + to1.toString() + " : " + result1);

TypeVariable<?> typeVar2 = TestImpl.class.getTypeParameters()[0];
ParameterizedType topre2 = TypeUtils.parameterize(TestIF.class, TypeUtils.wildcardType().build());
Type to2 = TypeUtils.parameterize(Class.class, TypeUtils.wildcardType().withUpperBounds(topre2).build());
Type from2 = TypeUtils.parameterize(Class.class,  TypeUtils.parameterize(TestImpl.class,typeVar2) );
boolean result2 = TypeUtils.isAssignable(from2, to2);
System.out.println("from : " + from2.toString() + " : to : " + to2.toString() + " : " + result2);

TypeVariable<?> typeVar3 = TestImpl2.class.getTypeParameters()[0];
ParameterizedType topre3 = TypeUtils.parameterize(TestIF.class, TypeUtils.wildcardType().build());
Type to3 = TypeUtils.parameterize(Class.class, TypeUtils.wildcardType().withUpperBounds(topre3).build());
Type from3 = TypeUtils.parameterize(Class.class,   TypeUtils.parameterize(TestImpl2.class,typeVar3));
boolean result3 = TypeUtils.isAssignable(from3, to3);
System.out.println("from : " + from3.toString() + " : to : " + to3.toString() + " : " + result3);