STC computes an imprecise LUB when involving two parameterized types implementing the same interface

class A {
  void foo(I x) {}
}
interface I {}
interface I2 extends I {}
class B<T> implements I2 {}
class C<T> implements I {}
class Main {
  public static void main(String[] args) {
    (new A()).foo((true) ? new B<String>() : new C<String>());
  }
}

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
test.groovy: 12: [Static type checking] - Cannot find matching method A#foo(java.lang.Object). Please check if the declared type is correct and if the method exists.
 @ line 12, column 5.
       (new A()).foo((true) ? new B<String>() : new C<String>());
       ^1 error