java.lang.Exception: Expected to dequeue 3 reference objects, but only got 1
        at Basic.main(Basic.java:139)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:588)
        at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
        at java.base/java.lang.Thread.run(Thread.java:1575)

This seems to be another variation on the problems in JDK-6771058