--- old/src/java.base/share/classes/java/util/IllegalFormatPrecisionException.java	2019-08-27 17:29:01.450324386 -0700
+++ new/src/java.base/share/classes/java/util/IllegalFormatPrecisionException.java	2019-08-27 17:29:01.254324386 -0700
@@ -34,6 +34,7 @@
  */
 public class IllegalFormatPrecisionException extends IllegalFormatException {
 
+    @java.io.Serial
     private static final long serialVersionUID = 18711008L;
 
     private int p;