[INFO] cloning repository https://github.com/gluaxspeed/r2wc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gluaxspeed/r2wc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgluaxspeed%2Fr2wc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgluaxspeed%2Fr2wc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cdc59383aab43b4c6439f6b4eae38cd2208c082f
[INFO] testing gluaxspeed/r2wc against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgluaxspeed%2Fr2wc" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gluaxspeed/r2wc on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gluaxspeed/r2wc
[INFO] finished tweaking git repo https://github.com/gluaxspeed/r2wc
[INFO] tweaked toml for git repo https://github.com/gluaxspeed/r2wc written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/gluaxspeed/r2wc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", 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] ab370cfab7251e1411a2bf6d4511f3d362cbc7c48be0a899c73914585ad8824e
[INFO] running `Command { std: "docker" "start" "-a" "ab370cfab7251e1411a2bf6d4511f3d362cbc7c48be0a899c73914585ad8824e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab370cfab7251e1411a2bf6d4511f3d362cbc7c48be0a899c73914585ad8824e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab370cfab7251e1411a2bf6d4511f3d362cbc7c48be0a899c73914585ad8824e", kill_on_drop: false }`
[INFO] [stdout] ab370cfab7251e1411a2bf6d4511f3d362cbc7c48be0a899c73914585ad8824e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 455103d26caa8ded3e1f71658ef3e8bab8b3e079f333160a666b96ee890f941b
[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" "455103d26caa8ded3e1f71658ef3e8bab8b3e079f333160a666b96ee890f941b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling ncurses v5.94.0
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling stopwatch v0.0.7
[INFO] [stderr]    Compiling r2wc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `set_server_port`
[INFO] [stdout]   --> src/connection.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn set_server_port() -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `connect_server`
[INFO] [stdout]   --> src/connection.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn connect_server() -> TcpStream {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_connection`
[INFO] [stdout]   --> src/connection.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_client_connection`
[INFO] [stdout]    --> src/connection.rs:129:12
[INFO] [stdout]     |
[INFO] [stdout] 129 |     pub fn new_client_connection(msg_size: usize) -> Connection {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `await_client`
[INFO] [stdout]    --> src/connection.rs:143:12
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/connection/peer.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn new(stream: TcpStream, who: String) -> Peer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/server.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     &line.pop();
[INFO] [stdout]     |                     ^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     let _ = &line.pop();
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/server.rs:195:21
[INFO] [stdout]     |
[INFO] [stdout] 195 |                     &line.push(char::from_u32(c as u32).unwrap());
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 195 |                     let _ = &line.push(char::from_u32(c as u32).unwrap());
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `set_port`
[INFO] [stdout]   --> src/connection.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn set_port() -> String {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_server`
[INFO] [stdout]   --> src/connection.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn create_server() -> TcpListener {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_peer`
[INFO] [stdout]   --> src/connection.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn get_peer(&self) -> Option<Peer> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_connection`
[INFO] [stdout]   --> src/connection.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_server_connection`
[INFO] [stdout]    --> src/connection.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn new_server_connection(msg_size: usize) -> (Connection, TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `await_client`
[INFO] [stdout]    --> src/connection.rs:143:12
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `await_client_timeout`
[INFO] [stdout]    --> src/connection.rs:162:12
[INFO] [stdout]     |
[INFO] [stdout] 162 |     pub fn await_client_timeout(&mut self, server: &TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reject_other_clients`
[INFO] [stdout]    --> src/connection.rs:186:12
[INFO] [stdout]     |
[INFO] [stdout] 186 |     pub fn reject_other_clients(&self, server: &TcpListener) -> (bool, Option<Peer>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_client`
[INFO] [stdout]   --> src/connection/peer.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn get_client(server: &TcpListener) -> Option<Peer> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.68s
[INFO] running `Command { std: "docker" "inspect" "455103d26caa8ded3e1f71658ef3e8bab8b3e079f333160a666b96ee890f941b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "455103d26caa8ded3e1f71658ef3e8bab8b3e079f333160a666b96ee890f941b", kill_on_drop: false }`
[INFO] [stdout] 455103d26caa8ded3e1f71658ef3e8bab8b3e079f333160a666b96ee890f941b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 456e28013b26e28f4af7b5eb9593cf315607599e2ee9dbfc9bb965763994e0e4
[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" "456e28013b26e28f4af7b5eb9593cf315607599e2ee9dbfc9bb965763994e0e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling r2wc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `set_server_port`
[INFO] [stdout]   --> src/connection.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn set_server_port() -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `connect_server`
[INFO] [stdout]   --> src/connection.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn connect_server() -> TcpStream {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_connection`
[INFO] [stdout]   --> src/connection.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_client_connection`
[INFO] [stdout]    --> src/connection.rs:129:12
[INFO] [stdout]     |
[INFO] [stdout] 129 |     pub fn new_client_connection(msg_size: usize) -> Connection {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `await_client`
[INFO] [stdout]    --> src/connection.rs:143:12
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/connection/peer.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn new(stream: TcpStream, who: String) -> Peer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/server.rs:178:21
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     &line.pop();
[INFO] [stdout]     |                     ^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 178 |                     let _ = &line.pop();
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `set_port`
[INFO] [stdout]   --> src/connection.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn set_port() -> String {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_server`
[INFO] [stdout]   --> src/connection.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn create_server() -> TcpListener {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_peer`
[INFO] [stdout]   --> src/connection.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn get_peer(&self) -> Option<Peer> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_connection`
[INFO] [stdout]   --> src/connection.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_server_connection`
[INFO] [stdout]    --> src/connection.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn new_server_connection(msg_size: usize) -> (Connection, TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `await_client`
[INFO] [stdout]    --> src/connection.rs:143:12
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `await_client_timeout`
[INFO] [stdout]    --> src/connection.rs:162:12
[INFO] [stdout]     |
[INFO] [stdout] 162 |     pub fn await_client_timeout(&mut self, server: &TcpListener) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reject_other_clients`
[INFO] [stdout]    --> src/connection.rs:186:12
[INFO] [stdout]     |
[INFO] [stdout] 186 |     pub fn reject_other_clients(&self, server: &TcpListener) -> (bool, Option<Peer>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_client`
[INFO] [stdout]   --> src/connection/peer.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn get_client(server: &TcpListener) -> Option<Peer> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/server.rs:195:21
[INFO] [stdout]     |
[INFO] [stdout] 195 |                     &line.push(char::from_u32(c as u32).unwrap());
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 195 |                     let _ = &line.push(char::from_u32(c as u32).unwrap());
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.13s
[INFO] running `Command { std: "docker" "inspect" "456e28013b26e28f4af7b5eb9593cf315607599e2ee9dbfc9bb965763994e0e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "456e28013b26e28f4af7b5eb9593cf315607599e2ee9dbfc9bb965763994e0e4", kill_on_drop: false }`
[INFO] [stdout] 456e28013b26e28f4af7b5eb9593cf315607599e2ee9dbfc9bb965763994e0e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", 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] 9e16863f43a8646f6322f3ae33c49a6d687119f88d688adca90c4fd565ade71c
[INFO] running `Command { std: "docker" "start" "-a" "9e16863f43a8646f6322f3ae33c49a6d687119f88d688adca90c4fd565ade71c", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `set_port`
[INFO] [stderr]   --> src/connection.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn set_port() -> String {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_server`
[INFO] [stderr]   --> src/connection.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn create_server() -> TcpListener {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_peer`
[INFO] [stderr]   --> src/connection.rs:84:12
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn get_peer(&self) -> Option<Peer> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_connection`
[INFO] [stderr]   --> src/connection.rs:96:12
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn new_connection(msg_size: usize, taken: Option<bool>) -> Connection {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_server_connection`
[INFO] [stderr]    --> src/connection.rs:111:12
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn new_server_connection(msg_size: usize) -> (Connection, TcpListener) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `await_client`
[INFO] [stderr]    --> src/connection.rs:143:12
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn await_client(&mut self, server: &TcpListener) {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `await_client_timeout`
[INFO] [stderr]    --> src/connection.rs:162:12
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn await_client_timeout(&mut self, server: &TcpListener) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reject_other_clients`
[INFO] [stderr]    --> src/connection.rs:186:12
[INFO] [stderr]     |
[INFO] [stderr] 186 |     pub fn reject_other_clients(&self, server: &TcpListener) -> (bool, Option<Peer>) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_client`
[INFO] [stderr]   --> src/connection/peer.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn get_client(server: &TcpListener) -> Option<Peer> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_server_port`
[INFO] [stderr]   --> src/connection.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn set_server_port() -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `connect_server`
[INFO] [stderr]   --> src/connection.rs:74:8
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn connect_server() -> TcpStream {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_client_connection`
[INFO] [stderr]    --> src/connection.rs:129:12
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn new_client_connection(msg_size: usize) -> Connection {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/connection/peer.rs:39:12
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn new(stream: TcpStream, who: String) -> Peer {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/server.rs:178:21
[INFO] [stderr]     |
[INFO] [stderr] 178 |                     &line.pop();
[INFO] [stderr]     |                     ^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 178 |                     let _ = &line.pop();
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/server.rs:195:21
[INFO] [stderr]     |
[INFO] [stderr] 195 |                     &line.push(char::from_u32(c as u32).unwrap());
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 195 |                     let _ = &line.push(char::from_u32(c as u32).unwrap());
[INFO] [stderr]     |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `r2wc` (bin "r2wc-client" test) generated 9 warnings
[INFO] [stderr] warning: `r2wc` (bin "r2wc-server" test) generated 8 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r2wc-3e70dbd627da2e02)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r2wc_client-a647765ebf84571c)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/r2wc_server-02f181fa7af7debf)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9e16863f43a8646f6322f3ae33c49a6d687119f88d688adca90c4fd565ade71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e16863f43a8646f6322f3ae33c49a6d687119f88d688adca90c4fd565ade71c", kill_on_drop: false }`
[INFO] [stdout] 9e16863f43a8646f6322f3ae33c49a6d687119f88d688adca90c4fd565ade71c