[INFO] cloning repository https://github.com/CheneyTao/PythonChallengeForRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CheneyTao/PythonChallengeForRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCheneyTao%2FPythonChallengeForRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCheneyTao%2FPythonChallengeForRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab907584ed1a61dca1d7a05adec44317a0e59721
[INFO] checking CheneyTao/PythonChallengeForRust against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCheneyTao%2FPythonChallengeForRust" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CheneyTao/PythonChallengeForRust on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CheneyTao/PythonChallengeForRust
[INFO] finished tweaking git repo https://github.com/CheneyTao/PythonChallengeForRust
[INFO] tweaked toml for git repo https://github.com/CheneyTao/PythonChallengeForRust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/CheneyTao/PythonChallengeForRust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4432bab849ee2088fd54dc39586ec1312949ee0b74bb40fb36af1a5ae73df4c9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4432bab849ee2088fd54dc39586ec1312949ee0b74bb40fb36af1a5ae73df4c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4432bab849ee2088fd54dc39586ec1312949ee0b74bb40fb36af1a5ae73df4c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4432bab849ee2088fd54dc39586ec1312949ee0b74bb40fb36af1a5ae73df4c9", kill_on_drop: false }`
[INFO] [stdout] 4432bab849ee2088fd54dc39586ec1312949ee0b74bb40fb36af1a5ae73df4c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 450dc8cc34a9a8250d01bb9ff3ad765eb85b496caee83ed887687d75a23a77ae
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "450dc8cc34a9a8250d01bb9ff3ad765eb85b496caee83ed887687d75a23a77ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling openssl-sys v0.9.52
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]     Checking backtrace-sys v0.1.32
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking flate2 v1.0.12
[INFO] [stderr]     Checking unicode-normalization v0.1.9
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking error-chain v0.12.1
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking publicsuffix v1.5.3
[INFO] [stderr]     Checking hyper v0.12.35
[INFO] [stderr]    Compiling synstructure v0.12.2
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking serde v1.0.102
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.22
[INFO] [stderr]     Checking rust_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `Command { std: "docker" "inspect" "450dc8cc34a9a8250d01bb9ff3ad765eb85b496caee83ed887687d75a23a77ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "450dc8cc34a9a8250d01bb9ff3ad765eb85b496caee83ed887687d75a23a77ae", kill_on_drop: false }`
[INFO] [stdout] 450dc8cc34a9a8250d01bb9ff3ad765eb85b496caee83ed887687d75a23a77ae