> 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