[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 #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-11-17 
09:30:41 UTC ---
nope, they haven't