http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60047
Bug ID: 60047 Summary: ICE with defaulted copy-constructor and virtual base class Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: paolo.carlini at oracle dot com Testcase (noticed while looking into PR58871): struct B { }; template<typename T> struct A : virtual B { A(); A(const A&); }; template<typename T> A<T>::A(const A<T>&) = default; A<int> a = A<int>();