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

@@ -249,10 +249,11 @@
                             break outer;                      // sib not ready
                     }
                 }
             }
         }
+        @java.io.Serial
         private static final long serialVersionUID = 5293554502939613543L;
     }
 
     static final class LongCumulateTask extends CountedCompleter<Void> {
         final long[] array;

@@ -399,10 +400,11 @@
                             break outer;                      // sib not ready
                     }
                 }
             }
         }
+        @java.io.Serial
         private static final long serialVersionUID = -5074099945909284273L;
     }
 
     static final class DoubleCumulateTask extends CountedCompleter<Void> {
         final double[] array;

@@ -549,10 +551,11 @@
                             break outer;                      // sib not ready
                     }
                 }
             }
         }
+        @java.io.Serial
         private static final long serialVersionUID = -586947823794232033L;
     }
 
     static final class IntCumulateTask extends CountedCompleter<Void> {
         final int[] array;

@@ -699,8 +702,9 @@
                             break outer;                      // sib not ready
                     }
                 }
             }
         }
+        @java.io.Serial
         private static final long serialVersionUID = 3731755594596840961L;
     }
 }