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// PR c++/81860 // { dg-do compile { target c++11 } } // { dg-final { scan-assembler "_ZN1AIjEC\[12\]Ev" } } template <typename T> struct A { A() {} }; struct B { template <typename D> B(D, const A<unsigned>& a = A<unsigned>()) : a(a) {} A<unsigned> a; }; struct C : B { using B::B; }; int main() { C c(0); }