--- old/src/java.base/share/classes/java/net/URLStreamHandler.java	2020-07-23 17:23:22.427597194 -0700
+++ new/src/java.base/share/classes/java/net/URLStreamHandler.java	2020-07-23 17:23:22.055597194 -0700
@@ -52,6 +52,11 @@
  */
 public abstract class URLStreamHandler {
     /**
+     * Constructor for subclasses to call.
+     */
+    public URLStreamHandler() {}
+
+    /**
      * Opens a connection to the object referenced by the
      * {@code URL} argument.
      * This method should be overridden by a subclass.