src/hotspot/share/oops/objArrayKlass.cpp

@@ -154,11 +154,12 @@
    assert(is_array_klass(), "sanity");
    assert(is_objArray_klass(), "sanity");
  }
  
  size_t ObjArrayKlass::oop_size(oop obj) const {
-   assert(obj->is_objArray(), "must be object array");
+   // In this assert, we cannot safely access the Klass* with compact headers.
+   assert(UseCompactObjectHeaders || obj->is_objArray(), "must be object array");
    return objArrayOop(obj)->object_size();
  }
  
  objArrayOop ObjArrayKlass::allocate(int length, TRAPS) {
    check_array_allocation_length(length, arrayOopDesc::max_array_length(T_OBJECT), CHECK_NULL);