https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93470
--- Comment #2 from frankhb1989 at gmail dot com ---
Case:
#include <functional>
void foo() {}
int main()
{
std::ref(foo)();
}
Sorry, I missed to mention it only failed with `clang++ -std=c++2a` (using
Clang++ 9.0.1). G++ with `-std=c++2a` still accepts the code. However, it seems
that Clang++ is correct here.
