diff -r ae5624088d86 -r b1883db930e7 src/share/vm/runtime/vframe.cpp
--- a/src/share/vm/runtime/vframe.cpp	Wed Jul 22 10:12:56 2015 -0700
+++ b/src/share/vm/runtime/vframe.cpp	Mon Jul 20 18:57:07 2015 +0300
@@ -148,8 +148,7 @@
   if (obj.not_null()) {
     st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, (address)obj());
     if (obj->klass() == SystemDictionary::Class_klass()) {
-      Klass* target_klass = java_lang_Class::as_Klass(obj());
-      st->print_cr("(a java.lang.Class for %s)", InstanceKlass::cast(target_klass)->external_name());
+      st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
     } else {
       Klass* k = obj->klass();
       st->print_cr("(a %s)", k->external_name());