src/java.base/share/classes/java/util/concurrent/ForkJoinTask.java

*** 240,249 ****
--- 240,254 ----
      private static final int ABNORMAL = 1 << 18; // set atomically with DONE
      private static final int THROWN   = 1 << 17; // set atomically with ABNORMAL
      private static final int SIGNAL   = 1 << 16; // true if joiner waiting
      private static final int SMASK    = 0xffff;  // short bits for tags
  
+     /**
+      * Constructor for subclasses to call.
+      */
+     public ForkJoinTask() {}
+ 
      static boolean isExceptionalStatus(int s) {  // needed by subclasses
          return (s & THROWN) != 0;
      }
  
      /**