--- old/src/share/vm/runtime/fieldDescriptor.hpp	2017-09-19 17:12:50.069913398 -0400
+++ new/src/share/vm/runtime/fieldDescriptor.hpp	2017-09-19 17:12:49.957912843 -0400
@@ -100,6 +100,7 @@
   bool is_final()                 const    { return access_flags().is_final(); }
   bool is_volatile()              const    { return access_flags().is_volatile(); }
   bool is_transient()             const    { return access_flags().is_transient(); }
+  bool is_flatten()               const    { return field()->is_flatten(); }
 
   bool is_synthetic()             const    { return access_flags().is_synthetic(); }