[libcxx] r309838 - Fix PR33727: std::basic_stringbuf only works with DefaultConstructible allocators. Thanks to Jonathan Wakely for the report and suggested fix

[Hans Wennborg via cfe-commits]

On Wed, Aug 2, 2017 at 10:31 AM, Marshall Clow via cfe-commits
<cfe-commits at lists.llvm.org> wrote:
> Author: marshall
> Date: Wed Aug  2 10:31:09 2017
> New Revision: 309838
>
> URL: http://llvm.org/viewvc/llvm-project?rev=309838&view=rev
> Log:
> Fix PR33727: std::basic_stringbuf only works with DefaultConstructible allocators. Thanks to Jonathan Wakely for the report and suggested fix
>
> Modified:
>     libcxx/trunk/include/sstream
>     libcxx/trunk/test/std/input.output/string.streams/stringstream.cons/string.pass.cpp

Merged to 5.0 in r310287.