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// { dg-options "-std=c++1z -fconcepts" }
struct fool {
constexpr fool operator&&(fool) const { return {}; }
constexpr fool operator||(fool) const { return {}; }
};
template<typename T> constexpr fool p1() { return {}; }
template<typename T> constexpr fool p2() { return {}; }
template<typename T>
concept bool C() { return p1<T>() && p2<T>(); }
template<C T> void f(T x) { }
int main() {
f(0); // { dg-error "cannot call|uses overloaded operator" }
}
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