diff -r 2cd8bbccbd2d -r 4ac20e5f96ce src/hotspot/share/oops/objArrayKlass.cpp
--- a/src/hotspot/share/oops/objArrayKlass.cpp	Tue Jul 31 13:12:06 2018 -0400
+++ b/src/hotspot/share/oops/objArrayKlass.cpp	Tue Jul 31 14:24:10 2018 -0400
@@ -477,8 +477,12 @@
   int print_len = MIN2((intx) oa->length(), MaxElementPrintSize);
   for(int index = 0; index < print_len; index++) {
     st->print(" - %3d : ", index);
-    oa->obj_at(index)->print_value_on(st);
-    st->cr();
+    if (oa->obj_at(index) != NULL) {
+      oa->obj_at(index)->print_value_on(st);
+      st->cr();
+    } else {
+      st->print_cr("NULL");
+    }
   }
   int remaining = oa->length() - print_len;
   if (remaining > 0) {
@@ -494,7 +498,11 @@
   element_klass()->print_value_on(st);
   int len = objArrayOop(obj)->length();
   st->print("[%d] ", len);
-  obj->print_address_on(st);
+  if (obj != NULL) {
+    obj->print_address_on(st);
+  } else {
+    st->print_cr("NULL");
+  }
 }
 
 const char* ObjArrayKlass::internal_name() const {