[INFO] cloning repository https://github.com/alexei-ozerov/map-reduce-exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexei-ozerov/map-reduce-exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexei-ozerov%2Fmap-reduce-exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexei-ozerov%2Fmap-reduce-exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e91180804b16b2595bf9a256daccb0decf870f2
[INFO] checking alexei-ozerov/map-reduce-exercise against try#99a443d6903f71d521237d8acb5a3016b534d17b for pr-83354
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexei-ozerov%2Fmap-reduce-exercise" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexei-ozerov/map-reduce-exercise on toolchain 99a443d6903f71d521237d8acb5a3016b534d17b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alexei-ozerov/map-reduce-exercise
[INFO] finished tweaking git repo https://github.com/alexei-ozerov/map-reduce-exercise
[INFO] tweaked toml for git repo https://github.com/alexei-ozerov/map-reduce-exercise written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/alexei-ozerov/map-reduce-exercise already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3310512f7d461e4d886f788dd629cd57975fb1604c315fb91be7716938a0a7f6
[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" "3310512f7d461e4d886f788dd629cd57975fb1604c315fb91be7716938a0a7f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3310512f7d461e4d886f788dd629cd57975fb1604c315fb91be7716938a0a7f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3310512f7d461e4d886f788dd629cd57975fb1604c315fb91be7716938a0a7f6", kill_on_drop: false }`
[INFO] [stdout] 3310512f7d461e4d886f788dd629cd57975fb1604c315fb91be7716938a0a7f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3aa3c76c0284608c3b6cd8132e93a7127035e7810d7bcfdf7c9106eec66ba0c7
[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" "3aa3c76c0284608c3b6cd8132e93a7127035e7810d7bcfdf7c9106eec66ba0c7", kill_on_drop: false }`
[INFO] [stderr]     Checking map-reduce-exercise v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "3aa3c76c0284608c3b6cd8132e93a7127035e7810d7bcfdf7c9106eec66ba0c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa3c76c0284608c3b6cd8132e93a7127035e7810d7bcfdf7c9106eec66ba0c7", kill_on_drop: false }`
[INFO] [stdout] 3aa3c76c0284608c3b6cd8132e93a7127035e7810d7bcfdf7c9106eec66ba0c7