void () { doTest( "import java.util.Collection;" + "class XXX {" + " interface A {}" + " interface B extends A {}" + " boolean m(Collection<A> c1, Collection<B> c2) {" + " return c2.equals(c1);" + " }" + "" + " boolean n(Collection<Integer> c1, Collection<String> c2) {" + " return c1./*'equals' between objects of inconvertible types 'Collection<Integer>' and 'Collection<String>'*/equals/**/(c2);" + " }" + "}"); }