1/* 2 * @test /nodynamiccopyright/ 3 * @bug 8016177 8016178 4 * @summary structural most specific and stuckness 5 * @compile/fail/ref=T8016177a.out -XDrawDiagnostics T8016177a.java 6 */ 7import java.util.List; 8 9class T8016177a { 10 11 interface ToIntFunction<X> { 12 int m(X x); 13 } 14 15 interface Function<X, Y> { 16 Y m(X x); 17 } 18 19 <T,R> void m1(List<T> s, Function<T,R> f) { } 20 <T,R> void m1(List<T> s, ToIntFunction<T> f) { } 21 22 <T,R> List<R> m2(List<T> s, Function<T,R> f) { return null; } 23 <T,R> List<R> m2(List<T> s, ToIntFunction<T> f) { return null; } 24 25 <T,R> List<T> m3(List<T> s, Function<T,R> f) { return null; } 26 <T,R> List<R> m3(List<T> s, ToIntFunction<T> f) { return null; } 27 28 <T,R> List<T> m4(List<T> s, Function<T,R> f) { return null; } 29 <T,R> List<T> m4(List<T> s, ToIntFunction<T> f) { return null; } 30 31 <T,R> List<R> m5(List<T> s, Function<T,R> f) { return null; } 32 <T,R> List<T> m5(List<T> s, ToIntFunction<T> f) { return null; } 33 34 <T extends R,R> List<R> m6(List<T> s, Function<T,R> f) { return null; } 35 <T extends R,R> List<T> m6(List<T> s, ToIntFunction<T> f) { return null; } 36 37 void test(List<String> ss) { 38 m1(ss, s->s.length()); //ambiguous 39 m2(ss, s->s.length()); //ambiguous 40 m3(ss, s->s.length()); //ambiguous 41 m4(ss, s->s.length()); //ambiguous 42 m5(ss, s->s.length()); //ambiguous 43 m6(ss, s->s.length()); //ambiguous 44 } 45} 46