[vector.cons.10] complexity in term of copy constructor calls but T does not need to have constructors LWG4123

https://eel.is/c++draft/vector#cons-10 states:

template<class InputIterator>
  constexpr vector(InputIterator first, InputIterator last,
                   const Allocator& = Allocator());

• Effects: Constructs a vector equal to the range [first, last), using the specified allocator.
• Complexity: Makes only N calls to the copy constructor of T (where N is the distance between first and last) and no reallocations if iterators first and last are of forward, bidirectional, or random access categories. It makes order N calls to the copy constructor of T and order logN reallocations if they are just input iterators.

But T does not need to be copy constructible.

Start by reading [vector.cons.10] in the C++ draft at eel.is, focusing on the range constructor's Effects and Complexity paragraphs. Check how the stated copy-constructor calls relate to the requirement that T need not be copy constructible. Done means the draft wording accurately describes the constructor without imposing that requirement.