[INFO] cloning repository https://github.com/samuherek/algo-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samuherek/algo-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuherek%2Falgo-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuherek%2Falgo-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e698ffcb5ee4b6d392847c7238692c66526f353
[INFO] checking samuherek/algo-test against try#8a0378607d6b34c242e3bfa75554871be641864b for pr-143028
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuherek%2Falgo-test" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/samuherek/algo-test
[INFO] finished tweaking git repo https://github.com/samuherek/algo-test
[INFO] tweaked toml for git repo https://github.com/samuherek/algo-test written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/samuherek/algo-test on toolchain 8a0378607d6b34c242e3bfa75554871be641864b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a0378607d6b34c242e3bfa75554871be641864b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/samuherek/algo-test 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" "+8a0378607d6b34c242e3bfa75554871be641864b" "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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a0378607d6b34c242e3bfa75554871be641864b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36c7bc8b950579292ecc92b99ff8c69b36eb64922d6f32dc05557306e299cf52
[INFO] running `Command { std: "docker" "start" "-a" "36c7bc8b950579292ecc92b99ff8c69b36eb64922d6f32dc05557306e299cf52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36c7bc8b950579292ecc92b99ff8c69b36eb64922d6f32dc05557306e299cf52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36c7bc8b950579292ecc92b99ff8c69b36eb64922d6f32dc05557306e299cf52", kill_on_drop: false }`
[INFO] [stdout] 36c7bc8b950579292ecc92b99ff8c69b36eb64922d6f32dc05557306e299cf52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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" "+8a0378607d6b34c242e3bfa75554871be641864b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df522480cba00b448cc4c5d632c1c6b2615bcb97e27f6a25e3608e85acc7c858
[INFO] running `Command { std: "docker" "start" "-a" "df522480cba00b448cc4c5d632c1c6b2615bcb97e27f6a25e3608e85acc7c858", kill_on_drop: false }`
[INFO] [stderr]     Checking alg-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `pop` is never used
[INFO] [stdout]   --> src/main.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pop` is never used
[INFO] [stdout]   --> src/main.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "df522480cba00b448cc4c5d632c1c6b2615bcb97e27f6a25e3608e85acc7c858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df522480cba00b448cc4c5d632c1c6b2615bcb97e27f6a25e3608e85acc7c858", kill_on_drop: false }`
[INFO] [stdout] df522480cba00b448cc4c5d632c1c6b2615bcb97e27f6a25e3608e85acc7c858