src/java.base/share/classes/java/util/ArrayPrefixHelpers.java

*** 101,114 ****
  
      /** The smallest subtask array partition size to use as threshold */
      static final int MIN_PARTITION = 16;
  
      static final class CumulateTask<T> extends CountedCompleter<Void> {
          final T[] array;
          final BinaryOperator<T> function;
          CumulateTask<T> left, right;
!         T in, out;
          final int lo, hi, origin, fence, threshold;
  
          /** Root task constructor */
          public CumulateTask(CumulateTask<T> parent,
                              BinaryOperator<T> function,
--- 101,119 ----
  
      /** The smallest subtask array partition size to use as threshold */
      static final int MIN_PARTITION = 16;
  
      static final class CumulateTask<T> extends CountedCompleter<Void> {
+         @SuppressWarnings("serial") // Not statically typed as Serializable
          final T[] array;
+         @SuppressWarnings("serial") // Not statically typed as Serializable
          final BinaryOperator<T> function;
          CumulateTask<T> left, right;
!         @SuppressWarnings("serial") // Not statically typed as Serializable
!         T in;
!         @SuppressWarnings("serial") // Not statically typed as Serializable
!         T out;
          final int lo, hi, origin, fence, threshold;
  
          /** Root task constructor */
          public CumulateTask(CumulateTask<T> parent,
                              BinaryOperator<T> function,
*** 255,264 ****
--- 260,270 ----
          private static final long serialVersionUID = 5293554502939613543L;
      }
  
      static final class LongCumulateTask extends CountedCompleter<Void> {
          final long[] array;
+         @SuppressWarnings("serial") // Not statically typed as Serializable
          final LongBinaryOperator function;
          LongCumulateTask left, right;
          long in, out;
          final int lo, hi, origin, fence, threshold;
  
*** 406,415 ****
--- 412,422 ----
          private static final long serialVersionUID = -5074099945909284273L;
      }
  
      static final class DoubleCumulateTask extends CountedCompleter<Void> {
          final double[] array;
+         @SuppressWarnings("serial") // Not statically typed as Serializable
          final DoubleBinaryOperator function;
          DoubleCumulateTask left, right;
          double in, out;
          final int lo, hi, origin, fence, threshold;
  
*** 557,566 ****
--- 564,574 ----
          private static final long serialVersionUID = -586947823794232033L;
      }
  
      static final class IntCumulateTask extends CountedCompleter<Void> {
          final int[] array;
+         @SuppressWarnings("serial") // Not statically typed as Serializable
          final IntBinaryOperator function;
          IntCumulateTask left, right;
          int in, out;
          final int lo, hi, origin, fence, threshold;