src/java.base/share/classes/sun/misc/Cleaner.java

*** 58,73 ****
  
  public class Cleaner
      extends PhantomReference<Object>
  {
  
-     // Dummy reference queue, needed because the PhantomReference constructor
-     // insists that we pass a queue.  Nothing will ever be placed on this queue
-     // since the reference handler invokes cleaners explicitly.
-     //
-     private static final ReferenceQueue<Object> dummyQueue = new ReferenceQueue<>();
- 
      // Doubly-linked list of live cleaners, which prevents the cleaners
      // themselves from being GC'd before their referents
      //
      static private Cleaner first = null;
  
--- 58,67 ----
*** 110,120 ****
      }
  
      private final Runnable thunk;
  
      private Cleaner(Object referent, Runnable thunk) {
!         super(referent, dummyQueue);
          this.thunk = thunk;
      }
  
      /**
       * Creates a new cleaner.
--- 104,114 ----
      }
  
      private final Runnable thunk;
  
      private Cleaner(Object referent, Runnable thunk) {
!         super(referent, null);
          this.thunk = thunk;
      }
  
      /**
       * Creates a new cleaner.