https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84269
--- Comment #8 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
From PR 84896:
gcc 8 currently emits the following for:
std::pair<int, int> foo;
error: 'pair' in namespace 'std' does not name a template type
std::pair<int, int> foo;
^~~~
We ought to suggest including <utility> for this, and probably various other
stdlib templates.
