Proposed resolution:

This wording is relative to N4910.

1. Modify [range.take.while.sentinel] as indicated:

   constexpr sentinel(sentinel<!Const> s)
     requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
   

   -2- Effects: Initializes end_ with std::move(s.end_) and pred_ with s.pred_.

[ 2022-07-25 Approved at July 2022 virtual plenary. Status changed: Ready → WP. ]

[ 2022-07-15; LWG telecon: move to Ready ]

[ 2022-06-21; Reflector poll ]

Set status to Tentatively Ready after seven votes in favour during reflector poll.

The conversion constructor of take_while_view::sentinel requires sentinel_t<V> must satisfy convertible_to<sentinel_t<Base>>, which indicates that the rvalue reference of sentinel_t<V> can be converted to sentinel_t<Base>, but in the Effects element, we assign the lvalue s.end_ to end_.