[INFO] cloning repository https://github.com/binocvlar/Rustlang-Towers-of-Hanoi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/binocvlar/Rustlang-Towers-of-Hanoi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinocvlar%2FRustlang-Towers-of-Hanoi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinocvlar%2FRustlang-Towers-of-Hanoi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38c5875230b50b8ed24a7c80217a7481594f9e29
[INFO] checking binocvlar/Rustlang-Towers-of-Hanoi against master#39b841dfe36f90a7cd111e7f0c55f32594f6e578 for pr-77035
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinocvlar%2FRustlang-Towers-of-Hanoi" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/binocvlar/Rustlang-Towers-of-Hanoi on toolchain 39b841dfe36f90a7cd111e7f0c55f32594f6e578
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/binocvlar/Rustlang-Towers-of-Hanoi
[INFO] finished tweaking git repo https://github.com/binocvlar/Rustlang-Towers-of-Hanoi
[INFO] tweaked toml for git repo https://github.com/binocvlar/Rustlang-Towers-of-Hanoi written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/binocvlar/Rustlang-Towers-of-Hanoi already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a98bb63df475e801fb4ade8b3c3cd157d3f3748f3d4727b774810fdbcefe66f1
[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" "a98bb63df475e801fb4ade8b3c3cd157d3f3748f3d4727b774810fdbcefe66f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a98bb63df475e801fb4ade8b3c3cd157d3f3748f3d4727b774810fdbcefe66f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a98bb63df475e801fb4ade8b3c3cd157d3f3748f3d4727b774810fdbcefe66f1", kill_on_drop: false }`
[INFO] [stdout] a98bb63df475e801fb4ade8b3c3cd157d3f3748f3d4727b774810fdbcefe66f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d74711112048da5aa5200969450a605a66c35dcce16a763f01f0392616f65643
[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" "d74711112048da5aa5200969450a605a66c35dcce16a763f01f0392616f65643", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking termion v1.5.2
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking towers_of_hanoi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.26s
[INFO] running `Command { std: "docker" "inspect" "d74711112048da5aa5200969450a605a66c35dcce16a763f01f0392616f65643", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d74711112048da5aa5200969450a605a66c35dcce16a763f01f0392616f65643", kill_on_drop: false }`
[INFO] [stdout] d74711112048da5aa5200969450a605a66c35dcce16a763f01f0392616f65643