https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71960
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:877cdcc714704e242f477580d81397cc1d0fc90e commit r8-10444-g877cdcc714704e242f477580d81397cc1d0fc90e Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Sep 10 15:49:26 2020 +0100 libstdc++: Enable assertions in constexpr string_view members [PR 71960] There is no longer any reason we can't just use __glibcxx_assert in constexpr functions. As long as the condition is true, there will be no call to std::__replacement_assert that would make the function ineligible for constant evaluation. PR libstdc++/71960 * include/experimental/string_view (basic_string_view): Enable debug assertions. * include/std/string_view (basic_string_view): Likewise.