[Bug libstdc++/106808] std::string_view range concept requirement causes compile error with Boost.Filesystem

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106808

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks related to the problem I fixed in
g:1e690757d30775ed340a368b9a9463b2ad68de01