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// { dg-do compile { target c++11 } } // { dg-final { scan-assembler "_ZZN1AIiEC4IiEET_S2_Ed_NKUlvE_clEv" } } template <class T> struct A { template <class U> A(U, U = []{ return 42; }()); }; struct B: A<int> { using A::A; }; B b(24);