[INFO] cloning repository https://github.com/mc738/dev_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mc738/dev_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmc738%2Fdev_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmc738%2Fdev_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc993d599a14a0d261b357c7091e173d7edeb52f
[INFO] checking mc738/dev_server against master#1b8f2e46e14b08208a53585570edd9206374aae8 for pr-155418-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmc738%2Fdev_server" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mc738/dev_server
[INFO] finished tweaking git repo https://github.com/mc738/dev_server
[INFO] tweaked toml for git repo https://github.com/mc738/dev_server written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mc738/dev_server on toolchain 1b8f2e46e14b08208a53585570edd9206374aae8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1b8f2e46e14b08208a53585570edd9206374aae8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mc738/dev_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1b8f2e46e14b08208a53585570edd9206374aae8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crypto-common v0.1.4
[INFO] [stderr]   Downloaded sha1 v0.10.1
[INFO] [stderr]   Downloaded digest v0.10.3
[INFO] [stderr]   Downloaded regex v1.6.0
[INFO] [stderr]   Downloaded cpufeatures v0.2.2
[INFO] [stderr]   Downloaded filetime v0.2.17
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.36.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.27
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.36.1
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.36.1
[INFO] [stderr]   Downloaded windows_i686_msvc v0.36.1
[INFO] [stderr]   Downloaded windows_i686_gnu v0.36.1
[INFO] [stderr]   Downloaded windows-sys v0.36.1
[INFO] [stderr]   Downloaded slab v0.4.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1b8f2e46e14b08208a53585570edd9206374aae8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65cba435c2cfafaebdaaf128a72c375db140e8ba9b60c283aed6df4db3445190
[INFO] running `Command { std: "docker" "start" "-a" "65cba435c2cfafaebdaaf128a72c375db140e8ba9b60c283aed6df4db3445190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65cba435c2cfafaebdaaf128a72c375db140e8ba9b60c283aed6df4db3445190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65cba435c2cfafaebdaaf128a72c375db140e8ba9b60c283aed6df4db3445190", kill_on_drop: false }`
[INFO] [stdout] 65cba435c2cfafaebdaaf128a72c375db140e8ba9b60c283aed6df4db3445190
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1b8f2e46e14b08208a53585570edd9206374aae8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6e2b06a3ab2fb07d7d9d9f13939a905361192e99b08da273206d5a53e390426
[INFO] running `Command { std: "docker" "start" "-a" "e6e2b06a3ab2fb07d7d9d9f13939a905361192e99b08da273206d5a53e390426", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking cpufeatures v0.2.2
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking filetime v0.2.17
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]     Checking block-buffer v0.10.2
[INFO] [stderr]     Checking crypto-common v0.1.4
[INFO] [stderr]     Checking digest v0.10.3
[INFO] [stderr]     Checking sha1 v0.10.1
[INFO] [stderr]     Checking dev_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/logging/logger.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Receiver, Sender};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/logging/logger.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::mpsc::{Receiver, Sender};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/http/common.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut body: Vec<u8> = Vec::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]    --> src/http/common.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut body: Vec<u8> = Vec::new();
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/http/common.rs:354:13
[INFO] [stdout]     |
[INFO] [stdout] 354 |         let mut bytes = Vec::from(self.get_string().as_bytes());
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `body` is never read
[INFO] [stdout]    --> src/http/common.rs:392:33
[INFO] [stdout]     |
[INFO] [stdout] 392 |         let mut body: Vec<u8> = Vec::new();
[INFO] [stdout]     |                                 ^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 420 |                     body = buffer[body_start_index..end].to_vec();
[INFO] [stdout]     |                     ---- `body` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/http/server.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let name = format!("worker_{}", id);
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread`
[INFO] [stdout]    --> src/http/server.rs:245:25
[INFO] [stdout]     |
[INFO] [stdout] 245 |                     let thread = thread::spawn(move || loop {
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `watch`
[INFO] [stdout]   --> src/main.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let watch = FileWatcher::start(not_tx, base_path.clone(), &log);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_watch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message_hub`
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let message_hub = MessageHub::start(sub_rx, not_rx, &log);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message_hub`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server`
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let server = Server::start("127.0.0.1:8080".to_string(), &log, sub_tx, base_path);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_server`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `thread` is never read
[INFO] [stdout]   --> src/files/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct FileWatcher {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 13 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `thread` is never read
[INFO] [stdout]   --> src/http/server.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub(crate) struct Server {
[INFO] [stdout]    |                   ------ field in this struct
[INFO] [stdout] 23 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/http/server.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct ConnectionPool {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] 29 |     sender: Sender<Job>,
[INFO] [stdout] 30 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/http/server.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 34 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 35 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `handler` is never read
[INFO] [stdout]   --> src/logging/logger.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Log {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 15 |     handler: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `thread` is never read
[INFO] [stdout]   --> src/messaging/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct MessageHub {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 22 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/http/common.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut body: Vec<u8> = Vec::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]    --> src/http/common.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut body: Vec<u8> = Vec::new();
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/http/common.rs:354:13
[INFO] [stdout]     |
[INFO] [stdout] 354 |         let mut bytes = Vec::from(self.get_string().as_bytes());
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `body` is never read
[INFO] [stdout]    --> src/http/common.rs:392:33
[INFO] [stdout]     |
[INFO] [stdout] 392 |         let mut body: Vec<u8> = Vec::new();
[INFO] [stdout]     |                                 ^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 420 |                     body = buffer[body_start_index..end].to_vec();
[INFO] [stdout]     |                     ---- `body` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/http/server.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let name = format!("worker_{}", id);
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread`
[INFO] [stdout]    --> src/http/server.rs:245:25
[INFO] [stdout]     |
[INFO] [stdout] 245 |                     let thread = thread::spawn(move || loop {
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `watch`
[INFO] [stdout]   --> src/main.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let watch = FileWatcher::start(not_tx, base_path.clone(), &log);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_watch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message_hub`
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let message_hub = MessageHub::start(sub_rx, not_rx, &log);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message_hub`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server`
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let server = Server::start("127.0.0.1:8080".to_string(), &log, sub_tx, base_path);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_server`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `thread` is never read
[INFO] [stdout]   --> src/files/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct FileWatcher {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 13 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `thread` is never read
[INFO] [stdout]   --> src/http/server.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub(crate) struct Server {
[INFO] [stdout]    |                   ------ field in this struct
[INFO] [stdout] 23 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/http/server.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct ConnectionPool {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] 29 |     sender: Sender<Job>,
[INFO] [stdout] 30 |     workers: Vec<Worker>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/http/server.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 34 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 35 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `handler` is never read
[INFO] [stdout]   --> src/logging/logger.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Log {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 15 |     handler: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `thread` is never read
[INFO] [stdout]   --> src/messaging/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct MessageHub {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 22 |     thread: JoinHandle<()>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.16s
[INFO] running `Command { std: "docker" "inspect" "e6e2b06a3ab2fb07d7d9d9f13939a905361192e99b08da273206d5a53e390426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6e2b06a3ab2fb07d7d9d9f13939a905361192e99b08da273206d5a53e390426", kill_on_drop: false }`
[INFO] [stdout] e6e2b06a3ab2fb07d7d9d9f13939a905361192e99b08da273206d5a53e390426
