>> uint64_t pseudo_random()
>> {
>>     std::random_device device;
>>     std::uniform_int_distribution<uint64_t> distribution;
>>     return distribution(device);
>> }

>> int main()
>> {
>>     pseudo_random();
>>     return 0;
>> }

>>> #9  libbitcoin::pseudo_random () at src/utility/random.cpp:39
>>> #10 0x00007ffff5a3d48d in libbitcoin::network::hosts::fetch
>>> (this=this@entry=0x657310,
>>>     out=...) at src/collections/hosts.cpp:76
>>> #11 0x00007ffff5a27e7a in
>>> libbitcoin::network::p2p::fetch_address(std::function<void
>>> (std::error_code const&, libbitcoin::message::network_address const&)>)
>>> const (this=0x656ad0,
>>>     handler=...) at src/p2p.cpp:430
>>> #12 0x00007ffff5a5ae5f in
>>> libbitcoin::network::session::fetch_address(std::function<void
>>> (std::error_code const&, libbitcoin::config::authority const&)>) const (
>>>     this=this@entry=0x7fff280d6330, handler=...) at
>>> src/sessions/session.cpp:83
>>> #13 0x00007ffff5a6064e in
>>> libbitcoin::network::session_batch::new_connect(std::shared_ptr<libbitcoin::network::connector>,
>>> std::function<void (std::error_code const&,
>>> std::shared_ptr<libbitcoin::network::channel>)>)
>>> (this=this@entry=0x7fff280d6330,
>>>     connect=std::shared_ptr (count 115, weak 1) 0x7ffef03f5760, handler=...)
>>>     at src/sessions/session_batch.cpp:70
>>> #14 0x00007ffff5a60b53 in
>>> libbitcoin::network::session_batch::connect(std::shared_ptr<libbitcoin::network::connector>,
>>> std::function<void (std::error_code const&,
>>> std::shared_ptr<libbitcoin::network::channel>)>) (this=0x7fff280d6330,
>>>     connect=std::shared_ptr (count 115, weak 1) 0x7ffef03f5760, handler=...)
>>>     at src/sessions/session_batch.cpp:56
>>> #15 0x00007ffff5a6f335 in
>>> libbitcoin::network::session_outbound::new_connection (
>>>     this=this@entry=0x7fff280d6330,
>>>     connect=std::shared_ptr (count 115, weak 1) 0x7ffef03f5760)
>>>     at src/sessions/session_outbound.cpp:87
>>> #16 0x00007ffff5a6f7d1 in
>>> libbitcoin::network::session_outbound::handle_connect (
>>>     this=0x7fff280d6330, ec=..., channel=...,
>>>     connect=std::shared_ptr (count 115, weak 1) 0x7ffef03f5760)
>>>     at src/sessions/session_outbound.cpp:97