java/lang/ref/ReferenceEnqueue.java fails with "RuntimeException: Error: poll() returned null; expected ref object"

----------System.out:(0/0)----------
----------System.err:(14/873)----------
java.lang.RuntimeException: Error: poll() returned null; expected ref object
at ReferenceEnqueue$WeakRef.run(ReferenceEnqueue.java:74)
at ReferenceEnqueue.main(ReferenceEnqueue.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:504)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:92)
at java.lang.Thread.run(Thread.java:746)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Error: poll() returned null; expected ref object
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Error: poll() returned null; expected ref object