[INFO] cloning repository https://github.com/kcexn/learn_rust_palindrome_checker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kcexn/learn_rust_palindrome_checker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkcexn%2Flearn_rust_palindrome_checker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkcexn%2Flearn_rust_palindrome_checker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] de3798a921f61d9aa8bee2709717b9901a7d4507
[INFO] documenting kcexn/learn_rust_palindrome_checker against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkcexn%2Flearn_rust_palindrome_checker" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kcexn/learn_rust_palindrome_checker on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kcexn/learn_rust_palindrome_checker
[INFO] finished tweaking git repo https://github.com/kcexn/learn_rust_palindrome_checker
[INFO] tweaked toml for git repo https://github.com/kcexn/learn_rust_palindrome_checker written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/kcexn/learn_rust_palindrome_checker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15a59dc6392a24ec1232c4c7471adfe2d32fbfcb28e8a7c140c23c26952c6581
[INFO] running `Command { std: "docker" "start" "-a" "15a59dc6392a24ec1232c4c7471adfe2d32fbfcb28e8a7c140c23c26952c6581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15a59dc6392a24ec1232c4c7471adfe2d32fbfcb28e8a7c140c23c26952c6581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15a59dc6392a24ec1232c4c7471adfe2d32fbfcb28e8a7c140c23c26952c6581", kill_on_drop: false }`
[INFO] [stdout] 15a59dc6392a24ec1232c4c7471adfe2d32fbfcb28e8a7c140c23c26952c6581
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71900c5619f6554ac1959be1d13fde14702fa54bc50636b4374c065ad076013d
[INFO] running `Command { std: "docker" "start" "-a" "71900c5619f6554ac1959be1d13fde14702fa54bc50636b4374c065ad076013d", kill_on_drop: false }`
[INFO] [stderr]     Checking utils v0.1.0 (/opt/rustwide/workdir/utils)
[INFO] [stderr]  Documenting palindrome_checker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `Command { std: "docker" "inspect" "71900c5619f6554ac1959be1d13fde14702fa54bc50636b4374c065ad076013d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71900c5619f6554ac1959be1d13fde14702fa54bc50636b4374c065ad076013d", kill_on_drop: false }`
[INFO] [stdout] 71900c5619f6554ac1959be1d13fde14702fa54bc50636b4374c065ad076013d