[INFO] fetching crate system_shutdown 3.0.0...
[INFO] checking system_shutdown-3.0.0 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate system_shutdown 3.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate system_shutdown 3.0.0 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate system_shutdown 3.0.0
[INFO] finished tweaking crates.io crate system_shutdown 3.0.0
[INFO] tweaked toml for crates.io crate system_shutdown 3.0.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate system_shutdown 3.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "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-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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5c34f6778829e283d82266e19c75526ce2ee17fc23ae5b42f624355884bbfc6
[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" "f5c34f6778829e283d82266e19c75526ce2ee17fc23ae5b42f624355884bbfc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5c34f6778829e283d82266e19c75526ce2ee17fc23ae5b42f624355884bbfc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5c34f6778829e283d82266e19c75526ce2ee17fc23ae5b42f624355884bbfc6", kill_on_drop: false }`
[INFO] [stdout] f5c34f6778829e283d82266e19c75526ce2ee17fc23ae5b42f624355884bbfc6
[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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fcf3484a01b7306c20eabf86ed9833451a379fa493d8562e9e05921da2c390c
[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" "5fcf3484a01b7306c20eabf86ed9833451a379fa493d8562e9e05921da2c390c", kill_on_drop: false }`
[INFO] [stderr]     Checking system_shutdown v3.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "5fcf3484a01b7306c20eabf86ed9833451a379fa493d8562e9e05921da2c390c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fcf3484a01b7306c20eabf86ed9833451a379fa493d8562e9e05921da2c390c", kill_on_drop: false }`
[INFO] [stdout] 5fcf3484a01b7306c20eabf86ed9833451a379fa493d8562e9e05921da2c390c