| // RUN: %clang_cc1 -verify -std=c++20 -fsyntax-only %s | 
 | // RUN: %clang_cc1 -verify -std=c++20 -fsyntax-only %s -fexperimental-new-constant-interpreter | 
 |  | 
 | struct S { // expected-note {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'int' to 'S &&' for 1st argument}} \ | 
 |            // expected-note {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'int' to 'const S &' for 1st argument}} | 
 |     int e; | 
 | }; | 
 |  | 
 | template<class T> | 
 | consteval int get_format() { | 
 | 	return nullptr; // expected-error {{cannot initialize return object of type 'int' with an rvalue of type 'std::nullptr_t'}} | 
 | } | 
 |  | 
 | template<class T> | 
 | constexpr S f(T) noexcept { | 
 | 	return get_format<T>(); // expected-error {{no viable conversion from returned value of type 'int' to function return type 'S'}} | 
 | } | 
 |  | 
 | constexpr S x = f(0); // expected-error {{constexpr variable 'x' must be initialized by a constant expression}} \ | 
 |                       // expected-note {{in instantiation of function template specialization 'f<int>' requested here}} |