void testHandleExceptionLoopInCause() {
        // Some broken exception that does return "this" as getCause
        AtomicReference<Throwable> causeRef = new AtomicReference<>(null);
        Exception cause2 = new RuntimeException("loop") {
            @Override
            public synchronized Throwable getCause() {
                return causeRef.get();
            }
        };
        causeRef.set(cause2);