src/java.base/share/classes/java/lang/invoke/ClassSpecializer.java

*** 457,466 ****
--- 457,471 ----
       * Code generation support for instances.
       * Subclasses can modify the behavior.
       */
      public class Factory {
          /**
+          * Construct a factory.
+          */
+         Factory() {}
+ 
+         /**
           * Get a concrete subclass of the top class for a given combination of bound types.
           *
           * @param speciesData the species requiring the class, not yet linked
           * @return a linked version of the same species
           */