ImmutableMap hasCode Bug

HashCodeTest.java

public void testHashCode() {
        ImmutableMap<String, Object> f1 = ImmutableMap.of("test", "test", "test2", "test2");
        ImmutableMap<String, Object> f2 = ImmutableMap.of("test2", "test2", "test3", "test3");

        assertFalse(f1.equals(f2));

        int hcf1 = f1.hashCode();
        int hcf2 = f2.hashCode();
        assertThat(hcf1, not(hcf2));
    }