new warnings from basic_string

[Paolo Carlini]

Lars Gullik Bjønnes wrote:

>I am not sure if this is known, or if it is something others see as
>well.
>  
>
Yes, this is known and has nothing to do with basic_string per se, it's just
a recently introduced bug in the c++ front end: dozens of meaningless
warnings spilled during the build of libstdc++-v3 itself, for instance.

A little bit of patience...
Paolo.