https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103013
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:ba2baf20356befbba6c8d83bbb3676cfee7e146f commit r10-10574-gba2baf20356befbba6c8d83bbb3676cfee7e146f Author: Jonathan Wakely <jwak...@redhat.com> Date: Mon Nov 1 11:32:39 2021 +0000 libstdc++: Reorder constraints on std::span::span(Range&&) constructor. In PR libstdc++/103013 Tim Song pointed out that we could reorder the constraints of this constructor. That's worth doing just to reduce the work the compiler has to do during overload resolution, even if it isn't needed to make the code in the PR work. libstdc++-v3/ChangeLog: * include/std/span (span(Range&&)): Reorder constraints. (cherry picked from commit 09bc98098e4ad474d2ba9da52457b29bbd08874b)