// { dg-do assemble } // Origin: Gabriel Dos Reis <Gabriel.Dos-Reis@cmla.ens-cachan.fr> // Bug 29. We failed to verify that template argument deduction // produces a valid result in nondeduce context. template<class T> struct Y { typedef T X; }; template<class T, class U> struct Base {}; template<class T> struct Base<T, typename T::X> {}; template<class T> struct Base<typename T::X, T> {}; template<class T, class U> struct Derived : Base <T, U> {}; struct A {}; template<class T> struct Derived<A, T> : Base< Y<T>, Y<T> > {}; int main() { Derived<A, int> d; }