src/java.base/share/classes/java/lang/ref/Reference.java

@@ -139,18 +139,10 @@
             }
         }
     }
 
     /*
-     * system property to disable clearing before enqueuing.
-     */
-    private static final class ClearBeforeEnqueue {
-        static final boolean DISABLE =
-            Boolean.getBoolean("jdk.lang.ref.disableClearBeforeEnqueue");
-    }
-
-    /*
      * Atomically get and clear (set to null) the VM's pending list.
      */
     private static native Reference<Object> getAndClearReferencePendingList();
 
     /*

@@ -297,11 +289,10 @@
      * @return   <code>true</code> if this reference object was successfully
      *           enqueued; <code>false</code> if it was already enqueued or if
      *           it was not registered with a queue when it was created
      */
     public boolean enqueue() {
-        if (!ClearBeforeEnqueue.DISABLE)
             this.referent = null;
         return this.queue.enqueue(this);
     }
 
     /* -- Constructors -- */