src/hotspot/share/classfile/packageEntry.cpp

*** 243,252 ****
--- 243,253 ----
    _qualified_exports = ModuleEntry::read_archived_entry_array((Array<ModuleEntry*>*)_qualified_exports);
    JFR_ONLY(INIT_ID(this);)
  }
  
  static int compare_package_by_name(PackageEntry* a, PackageEntry* b) {
+   assert(a == b || a->name() != b->name(), "no duplicated names");
    return a->name()->fast_compare(b->name());
  }
  
  Array<PackageEntry*>* PackageEntryTable::allocate_archived_entries() {
    // First count the packages in named modules