src/hotspot/share/oops/klass.cpp

 
 oop Klass::java_mirror() const {
   return _java_mirror.resolve();
 }
 
+oop Klass::java_mirror_no_keepalive() const {
+  return _java_mirror.peek();
+}
+
 bool Klass::is_cloneable() const {
   return _access_flags.is_cloneable_fast() ||
          is_subtype_of(SystemDictionary::Cloneable_klass());
 }
 

@@ -744,12 +748,12
     if (ko != NULL) {
       guarantee(ko->is_klass(), "should be klass");
     }
   }
 
-  if (java_mirror() != NULL) {
-    guarantee(oopDesc::is_oop(java_mirror()), "should be instance");
+  if (java_mirror_no_keepalive() != NULL) {
+    guarantee(oopDesc::is_oop(java_mirror_no_keepalive()), "should be instance");
   }
 }
 
 void Klass::oop_verify_on(oop obj, outputStream* st) {
   guarantee(oopDesc::is_oop(obj),  "should be oop");