https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89220
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Matt A from comment #0) > Interestingly with "-std=c++1y" both x and y fail to compile, which is at > least consistent (even if I'm not sure it's correct...) It's correct. -std=c++1y is a synonym for -std=c++14 which doesn't support class template argument deduction.
