[Bug c++/51630] failure to detect missing

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51630

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-20 
08:59:11 UTC ---
Ah, it's because you're using -fsyntax-only, so it doesn't instantiate
templates.  Don't do that.