http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51501
--- Comment #3 from Dave Abrahams <dave at boostpro dot com> 2011-12-11 10:32:25 UTC --- (In reply to comment #2) > Could this be related to Bug 45873? Not if your explanation in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45873#c2 is correct, I think. This is a straightforward pack expansion with no change in the number of arguments.