[Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0

[pawel.wrobel at nielsen dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90005

--- Comment #6 from Pawel <pawel.wrobel at nielsen dot com> ---
Hi,

Thanks for the explanation. Indeed, for example, the clang does not support the
non-POD(ex. std::string) to variadic function - as : 
error: cannot pass non-trivial object of type 'std::__cxx11::string' (aka
'basic_string<char>') to variadic function;