[Bug libstdc++/60407] [C++11] call of overloaded ‘isnan’ is ambiguous

[glisse at gcc dot gnu.org]

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

--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
> Looks like a dup of PR 48891.

See also the comments for PR 54130.