[Bug libstdc++/58764] [4.9 Regression] [lwg/2193] error: converting to ‘const std::vector >’ from initializer list would use explicit constructor

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58764

--- Comment #10 from Marc Glisse <glisse at gcc dot gnu.org> ---
       vector() _GLIBCXX_NOEXCEPT : _Base() { }
       list() _GLIBCXX_NOEXCEPT

I think that's wrong, the default construction of the allocator may throw,
hence the conditional noexcept I was suggesting in comment #3.