https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60976
--- Comment #37 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Giuseppe Ottaviano from comment #36) > I reported our relative build times with my version of the partial > specialization a few comments above: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60976#c26 . Yep, thanks. I'm hoping Viacheslav or Rene can try it too. > Your partial specialization patch causes an ICE in our version of GCC 4.9: I think that ICE is fixed by r234337 on the 4.9 branch, which I committed right before the allocator_traits patch. Good to know that what I committed is no slower than your locally patched version, thanks for checking.