Bug lambda with diamond operator and several interfaces

[lodart]

Hi,

There seems to be an error with a particular use of lambda expressions :

public interface TestLambda{
    default <T extends Ben & Jerry> Optional<T> bar () {
        return (Optional<T>) foo().stream().filter(elt -> elt.benMethod(Ben.class)).findFirst();
    }

    default <T extends Ben & Jerry> List<T> foo () {
        return Collections.emptyList();
    }
}

benMethod being a method declared in Ben interface.
It becomes :

public interface TestLambda {
    default <T extends Ben & Jerry> Optional<T> bar() {
        return ((Optional<T>) (foo().stream().filter((Ben & Jerry elt) -> elt.benMethod(Ben.class)).findFirst()));
    }

    default <T extends Ben & Jerry> List<T> foo() {
        return Collections.emptyList();
    }
}

(Notice the (Ben & Jerry elt) -> that doesn't compile)

Thank you for your support :)

[nharrand]

Hi @lodart ,
Thanks a lot for the bug report.
Would you make a pull request with a failing test out of it?