[INFO] fetching crate bulls-and-cows 1.0.16...
[INFO] checking bulls-and-cows-1.0.16 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate bulls-and-cows 1.0.16 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate bulls-and-cows 1.0.16 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bulls-and-cows 1.0.16
[INFO] finished tweaking crates.io crate bulls-and-cows 1.0.16
[INFO] tweaked toml for crates.io crate bulls-and-cows 1.0.16 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate bulls-and-cows 1.0.16 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19791d5820e49ea76df1965e67a92c9cafe4ce68fb14dc6f7f9b077bdf41f333
[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" "19791d5820e49ea76df1965e67a92c9cafe4ce68fb14dc6f7f9b077bdf41f333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19791d5820e49ea76df1965e67a92c9cafe4ce68fb14dc6f7f9b077bdf41f333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19791d5820e49ea76df1965e67a92c9cafe4ce68fb14dc6f7f9b077bdf41f333", kill_on_drop: false }`
[INFO] [stdout] 19791d5820e49ea76df1965e67a92c9cafe4ce68fb14dc6f7f9b077bdf41f333
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3db2b9baecfd42f6d6737799f5c8eaa72881e3acbeaf4e6df42f54f506bd9675
[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" "3db2b9baecfd42f6d6737799f5c8eaa72881e3acbeaf4e6df42f54f506bd9675", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking debug-helper v0.3.8
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking random-integer v1.0.5
[INFO] [stderr]     Checking random-pick v1.2.7
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking bulls-and-cows v1.0.16 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.93s
[INFO] running `Command { std: "docker" "inspect" "3db2b9baecfd42f6d6737799f5c8eaa72881e3acbeaf4e6df42f54f506bd9675", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3db2b9baecfd42f6d6737799f5c8eaa72881e3acbeaf4e6df42f54f506bd9675", kill_on_drop: false }`
[INFO] [stdout] 3db2b9baecfd42f6d6737799f5c8eaa72881e3acbeaf4e6df42f54f506bd9675