https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115480
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- #include <type_traits> #include <utility> struct trivially_copyable_no_assignment { int arr[4]; trivially_copyable_no_assignment& operator=(const trivially_copyable_no_assignment&) = delete; }; static_assert(std::is_trivially_copyable<std::pair<trivially_copyable_no_assignment, int> >::value, ""); int main() { }