Assertion failure on double `connect`

[CuriousGeorgiy]

Consider this trivial snippet with a Tarantool instance listening on port 3301:

#include "../src/Client/Connector.hpp"

using Buf_t = tnt::Buffer<16 * 1024>;
using Net_t = LibevNetProvider<Buf_t, DefaultStream>;

int
main()
{
	Connector<Buf_t, Net_t> client;
	Connection<Buf_t, Net_t> conn(client);
	struct ConnectOptions conn_opts{
		.address = "127.0.0.1",
		.service = "3301",		
	};
	client.connect(conn, conn_opts);
	client.connect(conn, conn_opts);
}

The second connect causes an assertion failure:

Assertion failed: conn.strm.has_status(SS_DEAD), function connect, file Connector.hpp, line 154.