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1// RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s2 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