[Bug c++/60775] Instantiates unused class template member function and reports error

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60775

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See the last item of http://gcc.gnu.org/gcc-4.9/porting_to.html