--- a/src/java.base/share/classes/sun/net/www/protocol/http/DigestAuthentication.java	Fri Aug 30 13:11:16 2019 +0100
+++ b/src/java.base/share/classes/sun/net/www/protocol/http/DigestAuthentication.java	Fri Aug 30 15:42:27 2019 +0100
@@ -76,6 +76,7 @@
     // One instance of these may be shared among several DigestAuthentication
     // instances as a result of a single authorization (for multiple domains)
 
+    // synchronized should be safe here
     static class Parameters implements java.io.Serializable {
         private static final long serialVersionUID = -3584543755194526252L;