[Bug libstdc++/51183] pair piecewise_construct_t constructor copies

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51183

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-05 
16:09:18 UTC ---
(In reply to comment #6)
>       template<typename... _Args2, std::size_t... _Indexes1,
                             ^^^^^^
                   should be _Args1

that's what I had prototyped a couple of weeks ago, it's untested obviously