This bug was fixed in the package libc++ - 3.7.0-1ubuntu0.1
--------------- libc++ (3.7.0-1ubuntu0.1) xenial; urgency=medium
* Fix error int the string header in c++11 mode (LP: #1610168).
-- Sergey Vidyuk <email address hidden> Sat, 24 Jun 2017 18:09:34 +0700
This bug was fixed in the package libc++ - 3.7.0-1ubuntu0.1
---------------
libc++ (3.7.0-1ubuntu0.1) xenial; urgency=medium
* Fix error int the string header in c++11 mode (LP: #1610168).
-- Sergey Vidyuk <email address hidden> Sat, 24 Jun 2017 18:09:34 +0700