1// RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s 2 3export module m3; 4export template <class> struct X { 5 template <class Self> friend void f(Self &&self) { 6 (Self&)self; // expected-warning {{expression result unused}} 7 } 8}; 9void g() { f(X<void>{}); } // expected-note {{in instantiation of function template specialization}} 10