/usr/include/c++/13/debug/safe_iterator.h:298:
In function:
    gnu_debug::_Safe_iterator<_Iterator, _Sequence, _Category>::reference 
    gnu_debug::_Safe_iterator<_Iterator, _Sequence, _Category>::operator*() 
    const [with _Iterator = std::_Rb_tree_const_iterator<long long int>; 
    _Sequence = std::debug::set<long long int>; _Category = 
    std::forward_iterator_tag; reference = const long long int&]

Error: attempt to dereference a past-the-end iterator.

Objects involved in the operation:
    iterator "this" @ 0x7ffc5d7fbeb0 {
      type = std::_Rb_tree_const_iterator<long long> (constant iterator);
      state = past-the-end;
      references sequence with type 'std::debug::set<long long, std::less<long long>, std::allocator<long long> >' @ 0x581c1076de90
    }
Aborted (core dumped)