--- old/src/java.base/share/classes/java/net/CacheResponse.java	2020-07-23 17:23:15.991597194 -0700
+++ new/src/java.base/share/classes/java/net/CacheResponse.java	2020-07-23 17:23:15.603597194 -0700
@@ -42,6 +42,11 @@
 public abstract class CacheResponse {
 
     /**
+     * Constructor for subclasses to call.
+     */
+    public CacheResponse() {}
+
+    /**
      * Returns the response headers as a Map.
      *
      * @return An immutable Map from response header field names to