https://github.com/openjdk/jdk/blob/adcfd257358fcd810f75d41bda7b916595e5dcdf/src/hotspot/share/utilities/resizeableResourceHash.hpp#L108

  void resize(unsigned old_size, unsigned new_size) {
    Node** old_table = BASE::_table;
    Node** new_table = BASE::alloc_table(new_size);

    Node* const* bucket = old_table;
    while (bucket < &old_table[old_size]) {

But old_size is already stored inside BASE::table_size(). The old_size parameter should be removed to avoid confusion and potential error.