[Bug c++/55203] No unused warning for variables of non-trivial types

[romain.geissler at amadeus dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55203

--- Comment #24 from Romain Geissler <romain.geissler at amadeus dot com> ---
typo:

s/why the extra unused std::string wasn't used/why the extra unused std::string
wasn't diagnosed/