http_request::reply causes SIGSEGV on Linux #44

I would appreciate if you could help me with this issue. I built the 'master' branch and I get segfault every time I want to reply to a request.

Part of the stack trace looks like this:
#0 0x0000000000686410 in vtable for web::http::details::_http_response ()
#1 0x000000000044609b in __gnu_cxx::new_allocatorweb::http::details::_http_response::destroyweb::http::details::_http_response (this=0x7fffd4000f00,

__p=0x7fffd4000f00) at /usr/include/c++/4.9/ext/new_allocator.h:124

#2 0x0000000000442af9 in std::allocator_traitsstd::allocator<web::http::details::_http_response >::_S_destroyweb::http::details::_http_response (__a=...,

__p=0x7fffd4000f00) at /usr/include/c++/4.9/bits/alloc_traits.h:282

#3 0x000000000043fcbf in std::allocator_traitsstd::allocator<web::http::details::_http_response >::destroyweb::http::details::_http_response (__a=...,

__p=0x7fffd4000f00) at /usr/include/c++/4.9/bits/alloc_traits.h:411

#4 0x000000000043ac81 in std::_Sp_counted_ptr_inplace<web::http::details::_http_response, std::allocatorweb::http::details::_http_response, (__gnu_cxx::_Lock_p

olicy)2>::_M_dispose (this=0x7fffd4000ef0) at /usr/include/c++/4.9/bits/shared_ptr_base.h:524