[INFO] cloning repository https://github.com/justinmoon/bittorrent
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/justinmoon/bittorrent" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinmoon%2Fbittorrent", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinmoon%2Fbittorrent'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b13122ec57fd03f5f155bc29c0742d30f76919c5
[INFO] checking justinmoon/bittorrent against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinmoon%2Fbittorrent" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/justinmoon/bittorrent on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/justinmoon/bittorrent
[INFO] finished tweaking git repo https://github.com/justinmoon/bittorrent
[INFO] tweaked toml for git repo https://github.com/justinmoon/bittorrent written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/justinmoon/bittorrent already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90922cd7fb210d3fbe019611342f079b12a0c0e3f161cc86bc5d31b98ece01b7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "90922cd7fb210d3fbe019611342f079b12a0c0e3f161cc86bc5d31b98ece01b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90922cd7fb210d3fbe019611342f079b12a0c0e3f161cc86bc5d31b98ece01b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90922cd7fb210d3fbe019611342f079b12a0c0e3f161cc86bc5d31b98ece01b7", kill_on_drop: false }`
[INFO] [stdout] 90922cd7fb210d3fbe019611342f079b12a0c0e3f161cc86bc5d31b98ece01b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4b854b4963397f5c2953abe77554a94108e4b975698b2ca23c8b94a9e91f3f3c
[INFO] running `Command { std: "docker" "start" "-a" "4b854b4963397f5c2953abe77554a94108e4b975698b2ca23c8b94a9e91f3f3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking openssl v0.10.26
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking tokio v0.2.6
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking native-tls v0.2.3
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling pin-project-internal v0.4.6
[INFO] [stderr]     Checking pin-project v0.4.6
[INFO] [stderr]     Checking hyper v0.13.1
[INFO] [stderr]     Checking hyper-tls v0.4.0
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_bytes v0.11.3
[INFO] [stderr]     Checking serde_json v1.0.56
[INFO] [stderr]     Checking serde_bencode v0.2.0
[INFO] [stderr]     Checking reqwest v0.10.0
[INFO] [stderr]     Checking bittorrent-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `torrent::TorrentFile`
[INFO] [stdout]  --> src/connection.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{torrent::TorrentFile, tracker::Peer};
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/connection.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{self, Read, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::FromUtf8Error`
[INFO] [stdout]  --> src/connection.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::string::FromUtf8Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `torrent::TorrentFile`
[INFO] [stdout]  --> src/connection.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{torrent::TorrentFile, tracker::Peer};
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/connection.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{self, Read, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::FromUtf8Error`
[INFO] [stdout]  --> src/connection.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::string::FromUtf8Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/connection.rs:189:9
[INFO] [stdout]     |
[INFO] [stdout] 171 | /         loop {
[INFO] [stdout] 172 | |             // Request piece
[INFO] [stdout] 173 | |             self.send_request(index, requested, block_size)?;
[INFO] [stdout] 174 | |             println!("send request #{}", index);
[INFO] [stdout] ...   |
[INFO] [stdout] 186 | |             }
[INFO] [stdout] 187 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 188 | 
[INFO] [stdout] 189 |           Ok(())
[INFO] [stdout]     |           ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/connection.rs:189:9
[INFO] [stdout]     |
[INFO] [stdout] 171 | /         loop {
[INFO] [stdout] 172 | |             // Request piece
[INFO] [stdout] 173 | |             self.send_request(index, requested, block_size)?;
[INFO] [stdout] 174 | |             println!("send request #{}", index);
[INFO] [stdout] ...   |
[INFO] [stdout] 186 | |             }
[INFO] [stdout] 187 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 188 | 
[INFO] [stdout] 189 |           Ok(())
[INFO] [stdout]     |           ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pstr`
[INFO] [stdout]   --> src/connection.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         let pstr = String::from_utf8(b[1..pstr_len + 1].to_vec())?;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_pstr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `peer_id`
[INFO] [stdout]   --> src/connection.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let peer_id = peer_id.to_vec();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_peer_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `piece`
[INFO] [stdout]   --> src/p2p.rs:70:17
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let piece = self.download_piece(&mut conn);
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_piece`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/connection.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |         let mut requested = 0;
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_piece`
[INFO] [stdout]  --> src/bitfield.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn has_piece(&self, index: usize) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_piece`
[INFO] [stdout]   --> src/bitfield.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn set_piece(&mut self, index: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `download`
[INFO] [stdout]    --> src/connection.rs:151:12
[INFO] [stdout]     |
[INFO] [stdout] 151 |     pub fn download(&mut self) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NoPeers`
[INFO] [stdout]  --> src/error.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     NoPeers,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_input`
[INFO] [stdout]   --> src/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn read_input() -> Result<String, Box<dyn Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pstr`
[INFO] [stdout]   --> src/connection.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         let pstr = String::from_utf8(b[1..pstr_len + 1].to_vec())?;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_pstr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `peer_id`
[INFO] [stdout]   --> src/connection.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let peer_id = peer_id.to_vec();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_peer_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `piece`
[INFO] [stdout]   --> src/p2p.rs:70:17
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let piece = self.download_piece(&mut conn);
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_piece`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/connection.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |         let mut requested = 0;
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NoPeers`
[INFO] [stdout]  --> src/error.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     NoPeers,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_input`
[INFO] [stdout]   --> src/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn read_input() -> Result<String, Box<dyn Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.27s
[INFO] running `Command { std: "docker" "inspect" "4b854b4963397f5c2953abe77554a94108e4b975698b2ca23c8b94a9e91f3f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b854b4963397f5c2953abe77554a94108e4b975698b2ca23c8b94a9e91f3f3c", kill_on_drop: false }`
[INFO] [stdout] 4b854b4963397f5c2953abe77554a94108e4b975698b2ca23c8b94a9e91f3f3c