test/langtools/tools/javac/generics/typevars/IntersectionSubVar.java

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/*
 * @test
 * @bug 8042656
 * @summary Subtyping for intersection types containing type variables
 * @compile IntersectionSubVar.java
 */

class IntersectionSubVar {

    interface Box<T> {
        void set(T arg);
        T get();
    }

    <I> Box<I> glb(Box<? super I> arg1, Box<? super I> arg2) {
        return null;
    }

    <E extends Cloneable> void takeBox(Box<? super E> box) {}

    <T> void test(Box<T> arg1, Box<Cloneable> arg2, Box<? super T> arg3) {
        T t = glb(arg1, arg2).get(); // assign T&Cloneable to T
        takeBox(arg3); // inference tests Box<CAP> <: Box<? super CAP&Cloneable>
    }

}