[Bug libstdc++/54392] [4.7/4.8/4.9 Regression] std::string::assign() fails to update length

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54392

--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, definitely. It should get fixed automatically by switching to the new
std::string impl.