class Bug {

  interface Function<T, R> {
    public R apply(T t);

    static <K> Function<K, K> identity() {
      return k -> k;
    }
  }

  interface IFunction extends Function<Integer, Integer> {
    static void a() {
      Function<Integer, Integer> identity = <error descr="Static method may be invoked on containing interface class only">identity();</error>
    }
  }

  public void foo() {
    Function<Integer, Integer> f = Function.identity();

    Function<Integer, Integer> g = <error descr="Static method may be invoked on containing interface class only">f.identity();</error>

    Function<Integer, Integer> h = IFunction.<error descr="Static method may be invoked on containing interface class only">identity</error>();
  }
}