--- old/src/java.base/share/classes/java/net/ProxySelector.java	2020-07-23 17:23:18.803597194 -0700
+++ new/src/java.base/share/classes/java/net/ProxySelector.java	2020-07-23 17:23:18.419597194 -0700
@@ -81,6 +81,11 @@
     }
 
     /**
+     * Constructor for subclasses to call.
+     */
+    public ProxySelector() {}
+
+    /**
      * Gets the system-wide proxy selector.
      *
      * @throws  SecurityException