[Bug libstdc++/54392] [4.6/4.7/4.8 Regression] std::string::assign() fails to update length

[paolo.carlini at oracle dot com]

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

--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-29 
14:47:28 UTC ---
Nope, I checked and _M_disjunct seems already Ok. The issue is actually with
the logic in assign when _M_disjunct is false: it assumes we are simply
overwriting things and no memory allocation needed.