src/share/vm/memory/iterator.cpp

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@@ -25,10 +25,11 @@
 #include "precompiled.hpp"
 #include "memory/iterator.hpp"
 #include "oops/oop.inline.hpp"
 
 void KlassToOopClosure::do_klass(Klass* k) {
+  assert(_oop_closure != NULL, "Not initialized?");
   k->oops_do(_oop_closure);
 }
 
 void CLDToOopClosure::do_cld(ClassLoaderData* cld) {
   cld->oops_do(_oop_closure, &_klass_closure, _must_claim_cld);