149 struct CopyCannotThrow {  struct
151   CopyCannotThrow() { ++alive; }  in CopyCannotThrow()  argument
152   CopyCannotThrow(const CopyCannotThrow &) noexcept { ++alive; }  in CopyCannotThrow()  function
153   CopyCannotThrow(CopyCannotThrow &&) noexcept { assert(false); }  in CopyCannotThrow()  argument
154   CopyCannotThrow &operator=(const CopyCannotThrow &) noexcept = default;
155   CopyCannotThrow &operator=(CopyCannotThrow &&) noexcept { assert(false); return *this; }  in operator =()  argument
158 int CopyCannotThrow::alive = 0;
493     using V = std::variant<int, CopyCannotThrow, std::string>;  in test_copy_assignment_different_index()
495     V v2(std::in_place_type<CopyCannotThrow>);  in test_copy_assignment_different_index()
496     assert(CopyCannotThrow::alive == 1);  in test_copy_assignment_different_index()
500     assert(CopyCannotThrow::alive == 2);  in test_copy_assignment_different_index()