--- a/src/java.base/share/classes/java/util/jar/JarFile.java	Mon Jul 30 13:53:30 2018 -0400
+++ b/src/java.base/share/classes/java/util/jar/JarFile.java	Wed Aug 08 08:05:43 2018 +0800
@@ -1025,7 +1025,7 @@
         }
     }
 
-    private synchronized void ensureInitialization() {
+    synchronized void ensureInitialization() {
         try {
             maybeInstantiateVerifier();
         } catch (IOException e) {