[INFO] cloning repository https://github.com/strexicious/believmr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/strexicious/believmr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrexicious%2Fbelievmr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrexicious%2Fbelievmr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72c33c3ddfd0364db1d600549c3074a6bd1732f8
[INFO] checking strexicious/believmr against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrexicious%2Fbelievmr" "/workspace/builds/worker-65/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-65/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/strexicious/believmr on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/strexicious/believmr
[INFO] finished tweaking git repo https://github.com/strexicious/believmr
[INFO] tweaked toml for git repo https://github.com/strexicious/believmr written to /workspace/builds/worker-65/source/Cargo.toml
[INFO] crate git repo https://github.com/strexicious/believmr already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 231a6f9b0752deff481ce9658f771c27c9fcf298bbf1b3594adbdc3563fd1b54
[INFO] running `Command { std: "docker" "start" "-a" "231a6f9b0752deff481ce9658f771c27c9fcf298bbf1b3594adbdc3563fd1b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "231a6f9b0752deff481ce9658f771c27c9fcf298bbf1b3594adbdc3563fd1b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "231a6f9b0752deff481ce9658f771c27c9fcf298bbf1b3594adbdc3563fd1b54", kill_on_drop: false }`
[INFO] [stdout] 231a6f9b0752deff481ce9658f771c27c9fcf298bbf1b3594adbdc3563fd1b54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aba40583d9e5357049d5d57a667ee689d61e12dbe0fe469b8c42ff8e21bca5d9
[INFO] running `Command { std: "docker" "start" "-a" "aba40583d9e5357049d5d57a667ee689d61e12dbe0fe469b8c42ff8e21bca5d9", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]     Checking byteorder v1.3.2
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]     Checking believmr v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/cluster/worker.rs (2 fixes)
[INFO] [stderr]        Fixed src/cluster/master.rs (2 fixes)
[INFO] [stdout] warning: associated function is never used: `print_mem`
[INFO] [stdout]   --> src/engine.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[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: `print_program`
[INFO] [stdout]   --> src/engine.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn print_program(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Worker`
[INFO] [stdout]  --> src/cluster/worker.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Worker {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `register`
[INFO] [stdout]   --> src/cluster/worker.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Master`
[INFO] [stdout]  --> src/cluster/master.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Master {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `listen_on`
[INFO] [stdout]   --> src/cluster/master.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `accept_workers`
[INFO] [stdout]   --> src/cluster/master.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MESSAGE_SIZE`
[INFO] [stdout]  --> src/cluster/message.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialized`
[INFO] [stdout]   --> src/cluster/message.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         host.read_exact(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 host.flush();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     worker.flush();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_mem`
[INFO] [stdout]   --> src/engine.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[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: `print_program`
[INFO] [stdout]   --> src/engine.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn print_program(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Worker`
[INFO] [stdout]  --> src/cluster/worker.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Worker {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `register`
[INFO] [stdout]   --> src/cluster/worker.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Master`
[INFO] [stdout]  --> src/cluster/master.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Master {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `listen_on`
[INFO] [stdout]   --> src/cluster/master.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `accept_workers`
[INFO] [stdout]   --> src/cluster/master.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MESSAGE_SIZE`
[INFO] [stdout]  --> src/cluster/message.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialized`
[INFO] [stdout]   --> src/cluster/message.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         host.read_exact(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 host.flush();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     worker.flush();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 14s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking believmr v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: associated function is never used: `print_mem`
[INFO] [stdout]   --> src/engine.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[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: `print_program`
[INFO] [stdout]   --> src/engine.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn print_program(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Worker`
[INFO] [stdout]  --> src/cluster/worker.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Worker {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `register`
[INFO] [stdout]   --> src/cluster/worker.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Master`
[INFO] [stdout]  --> src/cluster/master.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Master {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `listen_on`
[INFO] [stdout]   --> src/cluster/master.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `accept_workers`
[INFO] [stdout]   --> src/cluster/master.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MESSAGE_SIZE`
[INFO] [stdout]  --> src/cluster/message.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialized`
[INFO] [stdout]   --> src/cluster/message.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         host.read_exact(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 host.flush();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     worker.flush();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_mem`
[INFO] [stdout]   --> src/engine.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn print_mem(&self, pos: u16, offset: u16) {
[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: `print_program`
[INFO] [stdout]   --> src/engine.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn print_program(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Worker`
[INFO] [stdout]  --> src/cluster/worker.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Worker {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `register`
[INFO] [stdout]   --> src/cluster/worker.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn register<A: ToSocketAddrs>(id: usize, to: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Master`
[INFO] [stdout]  --> src/cluster/master.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Master {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `listen_on`
[INFO] [stdout]   --> src/cluster/master.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn listen_on<A: ToSocketAddrs>(addr: A) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `accept_workers`
[INFO] [stdout]   --> src/cluster/master.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn accept_workers(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MESSAGE_SIZE`
[INFO] [stdout]  --> src/cluster/message.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const MESSAGE_SIZE: usize = mem::size_of::<Message>();
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialized`
[INFO] [stdout]   --> src/cluster/message.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn serialized(&self) -> [u8; MESSAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         host.read_exact(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/worker.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 host.flush();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     worker.flush();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cluster/master.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 |                     worker.read_exact(&mut buffer);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "aba40583d9e5357049d5d57a667ee689d61e12dbe0fe469b8c42ff8e21bca5d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aba40583d9e5357049d5d57a667ee689d61e12dbe0fe469b8c42ff8e21bca5d9", kill_on_drop: false }`
[INFO] [stdout] aba40583d9e5357049d5d57a667ee689d61e12dbe0fe469b8c42ff8e21bca5d9