Your Java compiler can't handle this

Main.java

interface Z {}
interface N<x> {}
interface L<x> {}
interface Qlr<x> {}
interface Qrl<x> {}
interface E<x> extends
        Qlr<N<?super Qr<?super E<?super E<?super x>>>>>,
        Qrl<N<?super Ql<?super E<?super E<?super x>>>>> {}
interface Ql<x> extends
        L<N<?super Ql<?super L<?super N<?super x>>>>>,
        E<Qlr<?super N<?super x>>> {}
interface Qr<x> extends
        L<N<?super Qr<?super L<?super N<?super x>>>>>,
        E<Qrl<?super N<?super x>>> {}
class Main {
    L<?super N<?super
            L<?super N<?super
                    L<?super N<?super
                            E<?super E<?super Z>>>>>>>>
    doit(
            Qr<? super E<? super E<? super Z>>> v
    ){
        return v;
    } }