[Bug c++/60750] [4.8/4.9 Regression] double free after std::move on string inside throw when compiled with optimization

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60750

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Patch posted and in testing - the underlying issue is present at least since
4.1 (didn't check 4.0 sources).