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src/hotspot/share/runtime/biasedLocking.cpp

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@@ -43,11 +43,13 @@
 
 static GrowableArray<Handle>*  _preserved_oop_stack  = NULL;
 static GrowableArray<markOop>* _preserved_mark_stack = NULL;
 
 static void enable_biased_locking(InstanceKlass* k) {
+  if (!k->is_value()) {
   k->set_prototype_header(markOopDesc::biased_locking_prototype());
+  }
 }
 
 class VM_EnableBiasedLocking: public VM_Operation {
  private:
   bool _is_cheap_allocated;
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