Test closed/gc/clone-ref/TestCloneReference.java has timedout with the following stack trace in the "MainThread"

"MainThread" #20 prio=5 os_prio=64 tid=0x00000001008a5800 nid=0x35 runnable [0xffffffff648cc000]
   java.lang.Thread.State: RUNNABLE
   JavaThread state: _thread_blocked
Thread: 0x00000001008a5800 [0x35] State: _call_back _has_called_back 1 _at_poll_safepoint 0
   JavaThread state: _thread_blocked
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Throwable.java:784)
- locked <0x00000007bf299ab8> (a java.lang.CloneNotSupportedException)
at java.lang.Throwable.<init>(Throwable.java:251)
at java.lang.Exception.<init>(Exception.java:54)
at java.lang.CloneNotSupportedException.<init>(CloneNotSupportedException.java:53)
at java.lang.ref.Reference.clone(Reference.java:313)
at TestCloneReference$MyWeakRef.clone(TestCloneReference.java:43)
at TestCloneReference.shoot(TestCloneReference.java:110)
at TestCloneReference.run(TestCloneReference.java:142)
at TestCloneReference.main(TestCloneReference.java:150)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.lang.Thread.run(Thread.java:750)