src/hotspot/share/classfile/moduleEntry.cpp

*** 485,494 ****
--- 485,495 ----
      java_lang_Module::set_loader(module_handle(), loader_data->class_loader());
    }
  }
  
  static int compare_module_by_name(ModuleEntry* a, ModuleEntry* b) {
+   assert(a == b || a->name() != b->name(), "no duplicated names");
    return a->name()->fast_compare(b->name());
  }
  
  Array<ModuleEntry*>* ModuleEntryTable::allocate_archived_entries() {
    Array<ModuleEntry*>* archived_modules = MetaspaceShared::new_rw_array<ModuleEntry*>(number_of_entries());