langtools/test/tools/javac/generics/wildcards/T6450290.java

/*
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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/*
 * @test
 * @bug 6450290
 * @summary Capture of nested wildcards causes type error
 * @author Maurizio Cimadamore
 * @compile/fail T6450290.java
 */

public class T6450290 {
    static class Box<X extends Box<?,?>, T extends X> {
        T value;
        Box<X, T> same;
    }

    static class A extends Box<A,A> {}
    static class B extends Box<B,B> {}
    public static void main(String[] args) {
        Box<?,?> b = new Box<Box<A,A>,Box<A,A>>();
        b.value.same = new Box<B,B>(); //javac misses this bad assignment
    }
}