[INFO] cloning repository https://github.com/itsuy/rust-torrent
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/itsuy/rust-torrent" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsuy%2Frust-torrent"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsuy%2Frust-torrent'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 12a95d9debae35e3b60f3ff591527cd785da1317
[INFO] checking itsuy/rust-torrent against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsuy%2Frust-torrent" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/itsuy/rust-torrent on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/itsuy/rust-torrent
[INFO] finished tweaking git repo https://github.com/itsuy/rust-torrent
[INFO] tweaked toml for git repo https://github.com/itsuy/rust-torrent written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/itsuy/rust-torrent already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4f01a3ae011a9ad36044ffe4d1b5e654389728574df5f3ab102a5186f7dcd880
[INFO] running `"docker" "start" "-a" "4f01a3ae011a9ad36044ffe4d1b5e654389728574df5f3ab102a5186f7dcd880"`
[INFO] [stderr]    Compiling syn v1.0.15
[INFO] [stderr]    Compiling tokio-macros v0.2.4
[INFO] [stderr]     Checking tokio v0.2.11
[INFO] [stderr]     Checking rust-torrent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/message.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]  --> src/message.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/message.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `messageID` should have an upper camel case name
[INFO] [stderr]  --> src/message.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | type messageID = u8;
[INFO] [stderr]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `MessageId`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/handshake.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Cursor`
[INFO] [stderr]  --> src/handshake.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |               ^^^^^^  ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/handshake.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/peers.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Read`
[INFO] [stderr]  --> src/peers.rs:2:23
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> src/peers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SocketAddr`
[INFO] [stderr]  --> src/peers.rs:5:26
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
[INFO] [stderr]   |                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/client.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BigEndian`, `ReadBytesExt`
[INFO] [stderr]  --> src/client.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use byteorder::{ReadBytesExt, BigEndian};
[INFO] [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/client.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/client.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `input_pstr` is never read
[INFO] [stderr]   --> src/handshake.rs:63:25
[INFO] [stderr]    |
[INFO] [stderr] 63 |                 let mut input_pstr = "hello";
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `offset` is never read
[INFO] [stderr]   --> src/peers.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut offset = 0;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `port_cursor` is never read
[INFO] [stderr]   --> src/peers.rs:31:17
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let mut port_cursor = Cursor::new(&port_vec);
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reader_error_change`
[INFO] [stderr]   --> src/client.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut reader_error_change = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_reader_error_change`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `received` is never read
[INFO] [stderr]   --> src/client.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut received = new_handshake();
[INFO] [stderr]    |             ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/peers.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut num_peers = peers_bin.len()/peer_size;
[INFO] [stderr]    |         ----^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/peers.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut peer_error = Error::new(ErrorKind::InvalidData, "Malformed Peers");
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/peers.rs:36:17
[INFO] [stderr]    |
[INFO] [stderr] 36 |             let mut port_vc = &port_vec[0..2].to_vec();
[INFO] [stderr]    |                 ----^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/client.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut reader_error = Error::new(ErrorKind::InvalidData, "Reader Error");
[INFO] [stderr]    |         ----^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/client.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut reader_error_change = false;
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `ID` should have a snake case name
[INFO] [stderr]   --> src/message.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     ID: messageID,
[INFO] [stderr]    |     ^^ help: convert the identifier to snake case: `id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Payload` should have a snake case name
[INFO] [stderr]   --> src/message.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Payload: Vec<u8>,
[INFO] [stderr]    |     ^^^^^^^ help: convert the identifier to snake case: `payload`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `peerID_as_vec` should have a snake case name
[INFO] [stderr]   --> src/handshake.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut peerID_as_vec: Vec<u8> = hs.peer_id.to_vec();
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: convert the identifier to snake case: `peer_id_as_vec`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/message.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]  --> src/message.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/message.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `messageID` should have an upper camel case name
[INFO] [stderr]  --> src/message.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | type messageID = u8;
[INFO] [stderr]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `MessageId`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/handshake.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Cursor`
[INFO] [stderr]  --> src/handshake.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |               ^^^^^^  ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/handshake.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/peers.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Read`
[INFO] [stderr]  --> src/peers.rs:2:23
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> src/peers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SocketAddr`
[INFO] [stderr]  --> src/peers.rs:5:26
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
[INFO] [stderr]   |                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/client.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BigEndian`, `ReadBytesExt`
[INFO] [stderr]  --> src/client.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use byteorder::{ReadBytesExt, BigEndian};
[INFO] [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/client.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/client.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `input_pstr` is never read
[INFO] [stderr]   --> src/handshake.rs:63:25
[INFO] [stderr]    |
[INFO] [stderr] 63 |                 let mut input_pstr = "hello";
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `offset` is never read
[INFO] [stderr]   --> src/peers.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut offset = 0;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `port_cursor` is never read
[INFO] [stderr]   --> src/peers.rs:31:17
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let mut port_cursor = Cursor::new(&port_vec);
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reader_error_change`
[INFO] [stderr]   --> src/client.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut reader_error_change = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_reader_error_change`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `received` is never read
[INFO] [stderr]   --> src/client.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut received = new_handshake();
[INFO] [stderr]    |             ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/peers.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut num_peers = peers_bin.len()/peer_size;
[INFO] [stderr]    |         ----^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/peers.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut peer_error = Error::new(ErrorKind::InvalidData, "Malformed Peers");
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/peers.rs:36:17
[INFO] [stderr]    |
[INFO] [stderr] 36 |             let mut port_vc = &port_vec[0..2].to_vec();
[INFO] [stderr]    |                 ----^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/client.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let mut reader_error = Error::new(ErrorKind::InvalidData, "Reader Error");
[INFO] [stderr]    |         ----^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/client.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut reader_error_change = false;
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `has_piece`
[INFO] [stderr]  --> src/bitfield.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn has_piece(bf: &Bitfield, index: usize) -> bool{
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_piece`
[INFO] [stderr]   --> src/bitfield.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn set_piece(bf: &Bitfield, index: usize) -> Bitfield{
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_CHOKE`
[INFO] [stderr]  --> src/message.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | static MESSAGE_CHOKE: messageID  = 0;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_UNCHOKE`
[INFO] [stderr]  --> src/message.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | static MESSAGE_UNCHOKE: messageID = 1;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_INTERESTED`
[INFO] [stderr]   --> src/message.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | static MESSAGE_INTERESTED: messageID = 2;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_NOT_INTERESTED`
[INFO] [stderr]   --> src/message.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | static MESSAGE_NOT_INTERESTED: messageID = 3;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_HAVE`
[INFO] [stderr]   --> src/message.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | static MESSAGE_HAVE: messageID = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_BITFIELD`
[INFO] [stderr]   --> src/message.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | static MESSAGE_BITFIELD: messageID = 5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_REQUEST`
[INFO] [stderr]   --> src/message.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | static MESSAGE_REQUEST: messageID = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_PIECE`
[INFO] [stderr]   --> src/message.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | static MESSAGE_PIECE: messageID = 7;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `MESSAGE_CANCEL`
[INFO] [stderr]   --> src/message.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | static MESSAGE_CANCEL: messageID = 8;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ID`
[INFO] [stderr]   --> src/message.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     ID: messageID,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `Payload`
[INFO] [stderr]   --> src/message.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Payload: Vec<u8>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `format_request`
[INFO] [stderr]   --> src/message.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn format_request(index: u32, begin: u32, length: u32) -> Message{
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `format_have`
[INFO] [stderr]   --> src/message.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub fn format_have(index: u32) -> Message {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_piece`
[INFO] [stderr]   --> src/message.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn parse_piece(index: u32, buf: &mut Vec<u8>, msg: &Message) -> Result<u32>{//Result<u32, io::Error>
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_have`
[INFO] [stderr]   --> src/message.rs:82:4
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn parse_have(msg: &Message) -> Result<u32>{
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `serialize`
[INFO] [stderr]   --> src/message.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn serialize(msg: &Message) -> Vec<u8>{
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_message`
[INFO] [stderr]    --> src/message.rs:112:4
[INFO] [stderr]     |
[INFO] [stderr] 112 | fn read_message(reader: &mut Cursor<Vec<u8>>) -> Result<Message>{
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `name`
[INFO] [stderr]    --> src/message.rs:150:4
[INFO] [stderr]     |
[INFO] [stderr] 150 | fn name(msg: &Message) -> String{
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string`
[INFO] [stderr]    --> src/message.rs:169:4
[INFO] [stderr]     |
[INFO] [stderr] 169 | fn string(msg: &Message) -> String{
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Handshake`
[INFO] [stderr]  --> src/handshake.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Handshake{
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_handshake`
[INFO] [stderr]   --> src/handshake.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn new_handshake() -> Handshake{
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `serialize`
[INFO] [stderr]   --> src/handshake.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn serialize(hs: &Handshake) -> Vec<u8>{
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_handshake`
[INFO] [stderr]   --> src/handshake.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub fn read_handshake(reader: &mut TcpStream) -> Result<Handshake>{
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_socket_address`
[INFO] [stderr]   --> src/peers.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn get_socket_address(&self) -> SocketAddrV4{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unmarshal`
[INFO] [stderr]   --> src/peers.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn unmarshal(peers_bin: Vec<u8>) -> Result<Vec<Peer>>{
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Client`
[INFO] [stderr]   --> src/client.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct Client{
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `complete_handshake`
[INFO] [stderr]   --> src/client.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn complete_handshake(mut conn: TcpStream, info_hash: Vec<u8>, peer_id: Vec<u8>) -> Result<Handshake, Error>{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `ID` should have a snake case name
[INFO] [stderr]   --> src/message.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     ID: messageID,
[INFO] [stderr]    |     ^^ help: convert the identifier to snake case: `id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Payload` should have a snake case name
[INFO] [stderr]   --> src/message.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Payload: Vec<u8>,
[INFO] [stderr]    |     ^^^^^^^ help: convert the identifier to snake case: `payload`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `peerID_as_vec` should have a snake case name
[INFO] [stderr]   --> src/handshake.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut peerID_as_vec: Vec<u8> = hs.peer_id.to_vec();
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: convert the identifier to snake case: `peer_id_as_vec`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]   --> src/handshake.rs:86:17
[INFO] [stderr]    |
[INFO] [stderr] 86 |         let h = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]    |                 ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]   --> src/handshake.rs:99:17
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let h = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]    |                 ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]    --> src/handshake.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let h = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]     |                 ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]    --> src/handshake.rs:125:21
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let input = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]     |                     ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/message.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]  --> src/message.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/message.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `messageID` should have an upper camel case name
[INFO] [stderr]  --> src/message.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | type messageID = u8;
[INFO] [stderr]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `MessageId`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/handshake.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Cursor`
[INFO] [stderr]  --> src/handshake.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |               ^^^^^^  ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/handshake.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/peers.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Read`
[INFO] [stderr]  --> src/peers.rs:2:23
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> src/peers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SocketAddr`
[INFO] [stderr]  --> src/peers.rs:5:26
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
[INFO] [stderr]   |                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/client.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BigEndian`, `ReadBytesExt`
[INFO] [stderr]  --> src/client.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use byteorder::{ReadBytesExt, BigEndian};
[INFO] [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/client.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/client.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/client.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stderr]   --> src/client.rs:52:24
[INFO] [stderr]    |
[INFO] [stderr] 51 | /     fn create_client_server(){
[INFO] [stderr] 52 | |         let listener = TcpListener::bind("127.0.0.1:0")?;
[INFO] [stderr]    | |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stderr] 53 | |     }
[INFO] [stderr]    | |_____- this function should return `Result` or `Option` to accept `?`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stderr]    = note: required by `std::ops::Try::from_error`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0425.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `rust-torrent`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]   --> src/handshake.rs:86:17
[INFO] [stderr]    |
[INFO] [stderr] 86 |         let h = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]    |                 ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]   --> src/handshake.rs:99:17
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let h = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]    |                 ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]    --> src/handshake.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let h = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]     |                 ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in this scope
[INFO] [stderr]    --> src/handshake.rs:125:21
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let input = new(input_info_hash.to_vec(), input_peer_id.to_vec());
[INFO] [stderr]     |                     ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/message.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]  --> src/message.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]  --> src/message.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `messageID` should have an upper camel case name
[INFO] [stderr]  --> src/message.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | type messageID = u8;
[INFO] [stderr]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `MessageId`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/handshake.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Cursor`
[INFO] [stderr]  --> src/handshake.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |               ^^^^^^  ^^^^^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/handshake.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/peers.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`, `Read`
[INFO] [stderr]  --> src/peers.rs:2:23
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Cursor, BufReader, BufRead, Read, Result, Error, ErrorKind};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> src/peers.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SocketAddr`
[INFO] [stderr]  --> src/peers.rs:5:26
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
[INFO] [stderr]   |                          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/client.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BigEndian`, `ReadBytesExt`
[INFO] [stderr]  --> src/client.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use byteorder::{ReadBytesExt, BigEndian};
[INFO] [stderr]   |                 ^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `SocketAddrV4`, `SocketAddr`
[INFO] [stderr]  --> src/client.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpStream};
[INFO] [stderr]   |                ^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/client.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/client.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stderr]   --> src/client.rs:52:24
[INFO] [stderr]    |
[INFO] [stderr] 51 | /     fn create_client_server(){
[INFO] [stderr] 52 | |         let listener = TcpListener::bind("127.0.0.1:0")?;
[INFO] [stderr]    | |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stderr] 53 | |     }
[INFO] [stderr]    | |_____- this function should return `Result` or `Option` to accept `?`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stderr]    = note: required by `std::ops::Try::from_error`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0425.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `rust-torrent`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4f01a3ae011a9ad36044ffe4d1b5e654389728574df5f3ab102a5186f7dcd880"`
[INFO] running `"docker" "rm" "-f" "4f01a3ae011a9ad36044ffe4d1b5e654389728574df5f3ab102a5186f7dcd880"`
[INFO] [stdout] 4f01a3ae011a9ad36044ffe4d1b5e654389728574df5f3ab102a5186f7dcd880