[Bug libstdc++/56492] std::packaged_task requires CopyConstructible stored task

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56492

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-03-06 20:08:55 UTC ---
Created attachment 29600
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29600
Patch for after 4.9