https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88368
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yes, 4.9 accepts it, but so does 5.5 which contains r209907
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88368
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yes, 4.9 accepts it, but so does 5.5 which contains r209907