[INFO] cloning repository https://github.com/golnarmordadi/rust_dependency_chain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/golnarmordadi/rust_dependency_chain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolnarmordadi%2Frust_dependency_chain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolnarmordadi%2Frust_dependency_chain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7bcbab17e188998d33875a76f59c93fdbbbde186
[INFO] checking golnarmordadi/rust_dependency_chain against master#90384941aae4ea38de00e4702b50757e9b882a19 for pr-138340
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolnarmordadi%2Frust_dependency_chain" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/golnarmordadi/rust_dependency_chain on toolchain 90384941aae4ea38de00e4702b50757e9b882a19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+90384941aae4ea38de00e4702b50757e9b882a19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/golnarmordadi/rust_dependency_chain
[INFO] finished tweaking git repo https://github.com/golnarmordadi/rust_dependency_chain
[INFO] tweaked toml for git repo https://github.com/golnarmordadi/rust_dependency_chain written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/golnarmordadi/rust_dependency_chain 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" "+90384941aae4ea38de00e4702b50757e9b882a19" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+90384941aae4ea38de00e4702b50757e9b882a19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3363e4dc71dd981c99f9810751d4582028294afc0451e7d14d8c48afe7d6fdd8
[INFO] running `Command { std: "docker" "start" "-a" "3363e4dc71dd981c99f9810751d4582028294afc0451e7d14d8c48afe7d6fdd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3363e4dc71dd981c99f9810751d4582028294afc0451e7d14d8c48afe7d6fdd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3363e4dc71dd981c99f9810751d4582028294afc0451e7d14d8c48afe7d6fdd8", kill_on_drop: false }`
[INFO] [stdout] 3363e4dc71dd981c99f9810751d4582028294afc0451e7d14d8c48afe7d6fdd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+90384941aae4ea38de00e4702b50757e9b882a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6ba1e1affc0ac4fec3d41aa36cf7aa7bbfa6f6323d249050cec4bb11a75ed36
[INFO] running `Command { std: "docker" "start" "-a" "e6ba1e1affc0ac4fec3d41aa36cf7aa7bbfa6f6323d249050cec4bb11a75ed36", kill_on_drop: false }`
[INFO] [stderr]     Checking dependency_chain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/main.rs:144:24
[INFO] [stdout]     |
[INFO] [stdout] 144 |             .and_then(|res| task2(40))
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "e6ba1e1affc0ac4fec3d41aa36cf7aa7bbfa6f6323d249050cec4bb11a75ed36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6ba1e1affc0ac4fec3d41aa36cf7aa7bbfa6f6323d249050cec4bb11a75ed36", kill_on_drop: false }`
[INFO] [stdout] e6ba1e1affc0ac4fec3d41aa36cf7aa7bbfa6f6323d249050cec4bb11a75ed36