[INFO] cloning repository https://github.com/zarif-al/rustbook-ch20-exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zarif-al/rustbook-ch20-exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzarif-al%2Frustbook-ch20-exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzarif-al%2Frustbook-ch20-exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06a3414290c5eeda48fef50af2ae5696dec3b2dd
[INFO] checking zarif-al/rustbook-ch20-exercise against master#d14d202262d13df896b0c624b0cec6e4bfde631a for pr-143028
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzarif-al%2Frustbook-ch20-exercise" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zarif-al/rustbook-ch20-exercise
[INFO] finished tweaking git repo https://github.com/zarif-al/rustbook-ch20-exercise
[INFO] tweaked toml for git repo https://github.com/zarif-al/rustbook-ch20-exercise written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zarif-al/rustbook-ch20-exercise on toolchain d14d202262d13df896b0c624b0cec6e4bfde631a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zarif-al/rustbook-ch20-exercise 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" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9f0012a361e509d09f891240892a027a9c608378b39753fa76f6b0224007ab7
[INFO] running `Command { std: "docker" "start" "-a" "a9f0012a361e509d09f891240892a027a9c608378b39753fa76f6b0224007ab7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9f0012a361e509d09f891240892a027a9c608378b39753fa76f6b0224007ab7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9f0012a361e509d09f891240892a027a9c608378b39753fa76f6b0224007ab7", kill_on_drop: false }`
[INFO] [stdout] a9f0012a361e509d09f891240892a027a9c608378b39753fa76f6b0224007ab7
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78d11270b2d7f0886bbe4f314ca18072b0724efb1d9f0e7a1940c20ae076f1af
[INFO] running `Command { std: "docker" "start" "-a" "78d11270b2d7f0886bbe4f314ca18072b0724efb1d9f0e7a1940c20ae076f1af", kill_on_drop: false }`
[INFO] [stderr]     Checking rustbook-ch20-exercise v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "78d11270b2d7f0886bbe4f314ca18072b0724efb1d9f0e7a1940c20ae076f1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78d11270b2d7f0886bbe4f314ca18072b0724efb1d9f0e7a1940c20ae076f1af", kill_on_drop: false }`
[INFO] [stdout] 78d11270b2d7f0886bbe4f314ca18072b0724efb1d9f0e7a1940c20ae076f1af