http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58590
--- Comment #4 from Daniel Krügler <daniel.kruegler at googlemail dot com> --- (In reply to Paolo Carlini from comment #3) > I still believe this isn't a SFINAE proper issue. Could you please elaborate why? > Also note that in the original testcase main was *empty*. Sure, because I didn't want to see any error (including linker errors).