[Bug c++/33518] invalid Koenig lookup/incorrect SFINAE

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33518

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-25 
11:13:07 UTC ---
Clang accepts it too.

It was probably fixed in 4.5 by Jason implementing the extended SFINAE rules