1 // RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s
4 export template <class> struct X {
5 template <class Self> friend void f(Self &&self) {
6 (Self&)self; // expected-warning {{expression result unused}}
9 void g() { f(X<void>{}); } // expected-note {{in instantiation of function template specialization}}