interface Pong<T> {}
class Ping<T> implements Pong<Pong<? super Ping<Ping<T>>>> {
    static void Ping() {
        Pong<? super Ping<Long>> Ping = new Ping<Long>();
    }
}

尝试编译这个错误：

The system is out of resources.
Consult the following stack trace for details.
java.lang.StackOverflowError
    at com.sun.tools.javac.code.Types$23.visitClassType(Types.java:2579)
    at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:554)
    at com.sun.tools.javac.code.Types$UnaryVisitor.visit(Types.java:3260)
    at com.sun.tools.javac.code.Types$23.visitClassType(Types.java:2592)
    at com.sun.tools.javac.code.Types$23.visitClassType(Types.java:2579)
    at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:554)
    ...

Code courtesy of etorreborre on github.