Hi,
Sorry for the late response.
Thanks for the report I will investigate this issue and if necessary
file a bug in our bug DB.
Thanks,
Vicente
On 17/10/13 01:48, cushon wrote:
> Forwarded from compiler-dev at Alex Buckley's suggestion. Original thread:
> http://mail.openjdk.java.net/pipermail/compiler-dev/2013-October/007726.html
>
>
> I found some cases where javac 8 behaviour diverges from javac 7, and I'm
> interested in knowing whether this is a bug or an intentional change.
>
> The following programs do not compile with the jdk8 javac. (I tried b111 and
> 954dd199d6ff). All of the programs compile with the jdk7 javac.
>
> -------------------------------------------------------------------------------
> import java.util.List;
>
> class ReproOne {
>
> static class Baz<T> {
> public static List<Baz<Object>> getElements(Baz<Object> transcoder) {
> return null;
> }
> }
>
> private static void bar(Baz arg) {
> for (Baz element : Baz.getElements(arg)) {}
> }
> }
> -------------------------------------------------------------------------------
> abstract class ReproTwo<T> {
>
> class Bar<E> {}
>
> T get(Bar<? extends T> arg1, Bar arg2) {
> return circularGet(arg2, arg2);
> }
>
> abstract T circularGet(final Bar<? extends T> arg1, final Bar<?> arg2);
> }
> -------------------------------------------------------------------------------
> abstract class ReproThree<T, V> {
>
> class Binding<E> {}
> class ProviderBinding<E> extends Binding<E> {}
>
> abstract V visitOther(Binding<? extends T> binding);
>
> public V visitTwo(ProviderBinding<? extends T> providerBinding) {
> return visitOther((Binding) providerBinding);
> }
> }
> -------------------------------------------------------------------------------
>
> javac output:
>
> ReproOne.java:12: error: incompatible types: Object cannot be converted to
> Baz
> for (Baz element : Baz.getElements(arg)) {}
> ^
>
> ReproTwo.java:6: error: incompatible types: Object cannot be converted to T
> return circularGet(arg2, arg2);
> ^
> where T is a type-variable:
> T extends Object declared in class ReproTwo
>
> ReproThree.java:10: error: incompatible types: Object cannot be converted
> to V
> return visitOther((Binding) providerBinding);
> ^
> where V is a type-variable:
> V extends Object declared in class ReproThree
>