[INFO] cloning repository https://github.com/sstelfox/hundred_prisoners
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sstelfox/hundred_prisoners" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsstelfox%2Fhundred_prisoners", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsstelfox%2Fhundred_prisoners'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79e194d9f86a72350acc27c85f6014fe49622779
[INFO] checking sstelfox/hundred_prisoners against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsstelfox%2Fhundred_prisoners" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sstelfox/hundred_prisoners on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sstelfox/hundred_prisoners
[INFO] finished tweaking git repo https://github.com/sstelfox/hundred_prisoners
[INFO] tweaked toml for git repo https://github.com/sstelfox/hundred_prisoners written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sstelfox/hundred_prisoners already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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] 0d76cb96023fab849eef092accc2bb24a1ac230d5427f2adc21d2d5b11a77948
[INFO] running `Command { std: "docker" "start" "-a" "0d76cb96023fab849eef092accc2bb24a1ac230d5427f2adc21d2d5b11a77948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d76cb96023fab849eef092accc2bb24a1ac230d5427f2adc21d2d5b11a77948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d76cb96023fab849eef092accc2bb24a1ac230d5427f2adc21d2d5b11a77948", kill_on_drop: false }`
[INFO] [stdout] 0d76cb96023fab849eef092accc2bb24a1ac230d5427f2adc21d2d5b11a77948
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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] 831d42b584d699da9ef90a6b1f495d3348b8fa55013574b8e5da6fb4c821cbfc
[INFO] running `Command { std: "docker" "start" "-a" "831d42b584d699da9ef90a6b1f495d3348b8fa55013574b8e5da6fb4c821cbfc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking getrandom v0.1.13
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking hundred_prisoners v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.02s
[INFO] running `Command { std: "docker" "inspect" "831d42b584d699da9ef90a6b1f495d3348b8fa55013574b8e5da6fb4c821cbfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "831d42b584d699da9ef90a6b1f495d3348b8fa55013574b8e5da6fb4c821cbfc", kill_on_drop: false }`
[INFO] [stdout] 831d42b584d699da9ef90a6b1f495d3348b8fa55013574b8e5da6fb4c821cbfc