http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 51707, which changed state.
Bug 51707 Summary: [c++11] constexpr constructor cannot initialize const reference member http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51707 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED
