--- old/src/java.base/share/classes/java/lang/ExceptionInInitializerError.java	2019-08-27 17:27:12.302324386 -0700
+++ new/src/java.base/share/classes/java/lang/ExceptionInInitializerError.java	2019-08-27 17:27:11.986324386 -0700
@@ -50,6 +50,7 @@
     /**
      * Use serialVersionUID from JDK 1.1.X for interoperability
      */
+    @java.io.Serial
     private static final long serialVersionUID = 1521711792217232256L;
 
     /**
@@ -109,6 +110,7 @@
      *
      * @serialField exception Throwable
      */
+    @java.io.Serial
     private static final ObjectStreamField[] serialPersistentFields = {
         new ObjectStreamField("exception", Throwable.class)
     };
@@ -122,6 +124,7 @@
      * field in the older implementation and ExceptionInInitializerError::cause
      * was set to null.
      */
+    @java.io.Serial
     private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
         ObjectInputStream.GetField fields = s.readFields();
         Throwable exception = (Throwable) fields.get("exception", null);
@@ -134,6 +137,7 @@
      * To maintain compatibility with older implementation, write a serial
      * "exception" field with the cause as the value.
      */
+    @java.io.Serial
     private void writeObject(ObjectOutputStream out) throws IOException {
         ObjectOutputStream.PutField fields = out.putFields();
         fields.put("exception", super.getCause());