[Bug libstdc++/60407] call of overloaded ‘isnan’ is ambiguous

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60407

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
But I cannot reproduce it with what I thought it was, please provide the
preprocessed source.