--- old/src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java	2020-03-31 19:13:29.000000000 -0700
+++ new/src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java	2020-03-31 19:13:29.000000000 -0700
@@ -730,7 +730,7 @@
                     String pkgName = hostClass.getPackageName();
                     return (!pkgName.isEmpty() ? pkgName.replace('.', '/') + "/" : "") + "Stubs$$StringConcat";
                 } else {
-                    String name = hostClass.isHiddenClass() ? hostClass.getName().replace('/', '_')
+                    String name = hostClass.isHidden() ? hostClass.getName().replace('/', '_')
                                                             : hostClass.getName();
                     return name.replace('.', '/') + "$$StringConcat";
                 }