[INFO] cloning repository https://github.com/jxs/follower-maze-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jxs/follower-maze-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0628bd1ab17211b620881af4f1e9bfad5e4b8b8
[INFO] checking jxs/follower-maze-rust against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jxs/follower-maze-rust 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/jxs/follower-maze-rust
[INFO] finished tweaking git repo https://github.com/jxs/follower-maze-rust
[INFO] tweaked toml for git repo https://github.com/jxs/follower-maze-rust written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/jxs/follower-maze-rust 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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 68046d73b1acb3c2b71c4751bc9190f783b4a97d576bff68685c8f0374439997
[INFO] running `Command { std: "docker" "start" "-a" "68046d73b1acb3c2b71c4751bc9190f783b4a97d576bff68685c8f0374439997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68046d73b1acb3c2b71c4751bc9190f783b4a97d576bff68685c8f0374439997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68046d73b1acb3c2b71c4751bc9190f783b4a97d576bff68685c8f0374439997", kill_on_drop: false }`
[INFO] [stdout] 68046d73b1acb3c2b71c4751bc9190f783b4a97d576bff68685c8f0374439997
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 69a2316f475484468d0848d479a1cd02f33b1e14de915380f211d5277879f5f5
[INFO] running `Command { std: "docker" "start" "-a" "69a2316f475484468d0848d479a1cd02f33b1e14de915380f211d5277879f5f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]    Compiling anyhow v1.0.19
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking pin-project-lite v0.1.1
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.6.8
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.1
[INFO] [stderr]     Checking tokio v0.2.6
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking followermaze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.75s
[INFO] running `Command { std: "docker" "inspect" "69a2316f475484468d0848d479a1cd02f33b1e14de915380f211d5277879f5f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69a2316f475484468d0848d479a1cd02f33b1e14de915380f211d5277879f5f5", kill_on_drop: false }`
[INFO] [stdout] 69a2316f475484468d0848d479a1cd02f33b1e14de915380f211d5277879f5f5