http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56889
--- Comment #2 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2013-04-09 09:36:29 UTC --- (In reply to comment #1) In addition I would like to remark that the precise declaration state of the inherited initializer-list constructor in vector_stack is unclear, because of http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1573 But the existing wording implies that any usage of this constructor would be ill-formed because of the unavailable default constructor of its base class.