[INFO] fetching crate os-detect 0.2.2...
[INFO] checking os-detect-0.2.2 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate os-detect 0.2.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate os-detect 0.2.2 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 os-detect 0.2.2
[INFO] finished tweaking crates.io crate os-detect 0.2.2
[INFO] tweaked toml for crates.io crate os-detect 0.2.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded loopdev v0.2.1
[INFO] [stderr]   Downloaded os-release v0.1.0
[INFO] [stderr]   Downloaded sys-mount v1.2.1
[INFO] [stderr]   Downloaded partition-identity v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] fcf482bb7edabcff1208cf2ccf306644ad0350ae12ad0f420c31f9e4442d4605
[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" "fcf482bb7edabcff1208cf2ccf306644ad0350ae12ad0f420c31f9e4442d4605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcf482bb7edabcff1208cf2ccf306644ad0350ae12ad0f420c31f9e4442d4605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcf482bb7edabcff1208cf2ccf306644ad0350ae12ad0f420c31f9e4442d4605", kill_on_drop: false }`
[INFO] [stdout] fcf482bb7edabcff1208cf2ccf306644ad0350ae12ad0f420c31f9e4442d4605
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b113c86c2813ab1aa8009759396624aa34fd699d76cd2788fab8284b8aa17cc1
[INFO] running `Command { std: "docker" "start" "-a" "b113c86c2813ab1aa8009759396624aa34fd699d76cd2788fab8284b8aa17cc1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking errno v0.2.6
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking loopdev v0.2.1
[INFO] [stderr]     Checking sys-mount v1.2.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]     Checking partition-identity v0.2.8
[INFO] [stderr]     Checking os-detect v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.40s
[INFO] running `Command { std: "docker" "inspect" "b113c86c2813ab1aa8009759396624aa34fd699d76cd2788fab8284b8aa17cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b113c86c2813ab1aa8009759396624aa34fd699d76cd2788fab8284b8aa17cc1", kill_on_drop: false }`
[INFO] [stdout] b113c86c2813ab1aa8009759396624aa34fd699d76cd2788fab8284b8aa17cc1