https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102358
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:f9982b5a81a151663c76ba0a3fb6df674f29ba4b commit r10-10466-gf9982b5a81a151663c76ba0a3fb6df674f29ba4b Author: Patrick Palka <ppa...@redhat.com> Date: Thu Oct 21 12:13:35 2021 -0400 libstdc++: missing constexpr for __[nm]iter_base [PR102358] PR libstdc++/102358 libstdc++-v3/ChangeLog: * include/bits/stl_iterator.h (__niter_base): Make constexpr for C++20. (__miter_base): Likewise. * testsuite/25_algorithms/move/constexpr.cc: New test. (cherry picked from commit 5f7976f65b45c457b57bfc2c55ec845771e0d3c2)