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// { dg-options "-std=c++17 -fconcepts" }
template<typename T>
concept bool C() { return __is_class(T); }
template<typename T>
requires C<T>()
using X = T*;
// BUG: Alias templates are expanded at the point of use, regardless
// of whether or not they are dependent. This causes T* to be substituted
// without acutally checking the constraints.
template<typename T>
using Y = X<T>;
int main()
{
Y<int> y1; // { dg-error "" "" { xfail *-*-* } }
}
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