[INFO] cloning repository https://github.com/CyberSleeper/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CyberSleeper/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyberSleeper%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyberSleeper%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ae03a4bf974fed94559acf1b4c2e1672cdad58c
[INFO] checking CyberSleeper/hello-rust/4ae03a4bf974fed94559acf1b4c2e1672cdad58c against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCyberSleeper%2Fhello-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CyberSleeper/hello-rust on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CyberSleeper/hello-rust
[INFO] finished tweaking git repo https://github.com/CyberSleeper/hello-rust
[INFO] tweaked toml for git repo https://github.com/CyberSleeper/hello-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/CyberSleeper/hello-rust 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf9d2f664e33713fb75cf1187121e31ccd01cd0baf6cabeefc8317124320652c
[INFO] running `Command { std: "docker" "start" "-a" "cf9d2f664e33713fb75cf1187121e31ccd01cd0baf6cabeefc8317124320652c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf9d2f664e33713fb75cf1187121e31ccd01cd0baf6cabeefc8317124320652c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf9d2f664e33713fb75cf1187121e31ccd01cd0baf6cabeefc8317124320652c", kill_on_drop: false }`
[INFO] [stdout] cf9d2f664e33713fb75cf1187121e31ccd01cd0baf6cabeefc8317124320652c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 106ab6ac15c77d66583edb2ae0bb3f7db190c9503568296922824b6e91d2322d
[INFO] running `Command { std: "docker" "start" "-a" "106ab6ac15c77d66583edb2ae0bb3f7db190c9503568296922824b6e91d2322d", kill_on_drop: false }`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/lib.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ThreadPool {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 11 |   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:45:3
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 45 |   id: usize,
[INFO] [stdout]    |   ^^
[INFO] [stdout] 46 |   thread: thread::JoinHandle<()>,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `workers` is never read
[INFO] [stdout]   --> src/lib.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ThreadPool {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 11 |   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:45:3
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Worker {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 45 |   id: usize,
[INFO] [stdout]    |   ^^
[INFO] [stdout] 46 |   thread: thread::JoinHandle<()>,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "106ab6ac15c77d66583edb2ae0bb3f7db190c9503568296922824b6e91d2322d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "106ab6ac15c77d66583edb2ae0bb3f7db190c9503568296922824b6e91d2322d", kill_on_drop: false }`
[INFO] [stdout] 106ab6ac15c77d66583edb2ae0bb3f7db190c9503568296922824b6e91d2322d