[INFO] cloning repository https://github.com/thomas-delalande/rust-playgroun
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomas-delalande/rust-playgroun" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-delalande%2Frust-playgroun", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-delalande%2Frust-playgroun'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ebe6b670283d2a59af84188f517c95c890e9f4f
[INFO] checking thomas-delalande/rust-playgroun against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-delalande%2Frust-playgroun" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomas-delalande/rust-playgroun on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomas-delalande/rust-playgroun
[INFO] finished tweaking git repo https://github.com/thomas-delalande/rust-playgroun
[INFO] tweaked toml for git repo https://github.com/thomas-delalande/rust-playgroun written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate git repo https://github.com/thomas-delalande/rust-playgroun already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94d78d65128bf0b03d52098fd5f8bdadb146448407adf9c377028a8f33ecae8a
[INFO] running `Command { std: "docker" "start" "-a" "94d78d65128bf0b03d52098fd5f8bdadb146448407adf9c377028a8f33ecae8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94d78d65128bf0b03d52098fd5f8bdadb146448407adf9c377028a8f33ecae8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94d78d65128bf0b03d52098fd5f8bdadb146448407adf9c377028a8f33ecae8a", kill_on_drop: false }`
[INFO] [stdout] 94d78d65128bf0b03d52098fd5f8bdadb146448407adf9c377028a8f33ecae8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d638c2897c8432e002b977411f8781750c412cbaf3e79f344192a018347f2bb
[INFO] running `Command { std: "docker" "start" "-a" "0d638c2897c8432e002b977411f8781750c412cbaf3e79f344192a018347f2bb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking rmp v0.8.10
[INFO] [stderr]     Checking rmp-serde v0.15.5
[INFO] [stderr]     Checking server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/main.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use serde::{Deserialize, Serialize};
[INFO] [stdout]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/main.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use serde::{Deserialize, Serialize};
[INFO] [stdout]    |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MessageBus`
[INFO] [stdout]  --> src/message_bus.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct MessageBus {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MessageBus`
[INFO] [stdout]  --> src/message_bus.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct MessageBus {
[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: `add_client`
[INFO] [stdout]   --> src/message_bus.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn add_client(&mut self, id: u32, stream: TcpStream) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unicast`
[INFO] [stdout]   --> src/message_bus.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn unicast(&self, id: u32, message: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `broadcast`
[INFO] [stdout]   --> src/message_bus.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn broadcast(&self, message: &str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             stream.shutdown(Shutdown::Both);
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_client`
[INFO] [stdout]   --> src/message_bus.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn add_client(&mut self, id: u32, stream: TcpStream) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.68s
[INFO] [stdout] warning: associated function is never used: `unicast`
[INFO] [stdout]   --> src/message_bus.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn unicast(&self, id: u32, message: &str) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `broadcast`
[INFO] [stdout]   --> src/message_bus.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn broadcast(&self, message: &str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             stream.shutdown(Shutdown::Both);
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0d638c2897c8432e002b977411f8781750c412cbaf3e79f344192a018347f2bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d638c2897c8432e002b977411f8781750c412cbaf3e79f344192a018347f2bb", kill_on_drop: false }`
[INFO] [stdout] 0d638c2897c8432e002b977411f8781750c412cbaf3e79f344192a018347f2bb