1 // PR c++/87506 2 // { dg-do compile { target c++11 } } 3 4 struct A {}; BB5 struct B { constexpr B (const A) {} }; 6 struct C : B { using B::B; }; 7 8 void foo()9 foo () 10 { 11 C c (A{}); 12 } 13