[Bug c++/60371] std::vector::emplace_back

[dilyan.palauzov at aegee dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60371

--- Comment #3 from Дилян Палаузов <dilyan.palauzov at aegee dot org> ---
Indeed, adding

  z (const z& x) { var = strdup (x.var); }

solves the problem.  However, I don't understand how that "y.clear();" between
the y.emplace_back() in the original program avoids the double free.