[INFO] cloning repository https://github.com/naylafn/tutorial-adpro-6
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/naylafn/tutorial-adpro-6" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnaylafn%2Ftutorial-adpro-6", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnaylafn%2Ftutorial-adpro-6'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2af185ce1ad58785f698de8d95d3f930df6ef4bc
[INFO] checking naylafn/tutorial-adpro-6 against master#c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2 for pr-142712
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnaylafn%2Ftutorial-adpro-6" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/naylafn/tutorial-adpro-6
[INFO] finished tweaking git repo https://github.com/naylafn/tutorial-adpro-6
[INFO] tweaked toml for git repo https://github.com/naylafn/tutorial-adpro-6 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/naylafn/tutorial-adpro-6 on toolchain c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/naylafn/tutorial-adpro-6 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" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 550ade0f90ac037f0327f4f506c679b12e77c66c2726c3ee35f4d394e3e65f60
[INFO] running `Command { std: "docker" "start" "-a" "550ade0f90ac037f0327f4f506c679b12e77c66c2726c3ee35f4d394e3e65f60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "550ade0f90ac037f0327f4f506c679b12e77c66c2726c3ee35f4d394e3e65f60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "550ade0f90ac037f0327f4f506c679b12e77c66c2726c3ee35f4d394e3e65f60", kill_on_drop: false }`
[INFO] [stdout] 550ade0f90ac037f0327f4f506c679b12e77c66c2726c3ee35f4d394e3e65f60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92089375b6f4dd4d094f33735807d7202e01c453c452b346facfc39432afdb2a
[INFO] running `Command { std: "docker" "start" "-a" "92089375b6f4dd4d094f33735807d7202e01c453c452b346facfc39432afdb2a", kill_on_drop: false }`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `job`
[INFO] [stdout]   --> src/lib.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let job = match receiver.lock().unwrap().recv() {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_job`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ThreadPool {
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 7 |     workers: Vec<Worker>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 53 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 54 |     thread: Option<thread::JoinHandle<()>>, 
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `job`
[INFO] [stdout]   --> src/lib.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let job = match receiver.lock().unwrap().recv() {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_job`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ThreadPool {
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 7 |     workers: Vec<Worker>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `thread` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 53 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 54 |     thread: Option<thread::JoinHandle<()>>, 
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "92089375b6f4dd4d094f33735807d7202e01c453c452b346facfc39432afdb2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92089375b6f4dd4d094f33735807d7202e01c453c452b346facfc39432afdb2a", kill_on_drop: false }`
[INFO] [stdout] 92089375b6f4dd4d094f33735807d7202e01c453c452b346facfc39432afdb2a