[Bug libstdc++/79511] Convertation issues in std::codecvt_utf8_utf16

[mikhail at pilin dot name]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79511

--- Comment #2 from ww898 <mikhail at pilin dot name> ---
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.2 LTS
Release:        16.04
Codename:       xenial

$ uname -a
Linux 3.4.0+ #1 PREEMPT Thu Aug 1 17:06:05 CST 2013 x86_64 x86_64 x86_64
GNU/Linux

$ gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609


Options was taken form CMake v3.5.1 by default and -std=c++11 was added.