[INFO] fetching crate tokio-threadpool 0.1.18...
[INFO] documenting tokio-threadpool-0.1.18 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate tokio-threadpool 0.1.18 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate tokio-threadpool 0.1.18 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-threadpool 0.1.18
[INFO] finished tweaking crates.io crate tokio-threadpool 0.1.18
[INFO] tweaked toml for crates.io crate tokio-threadpool 0.1.18 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate tokio-threadpool 0.1.18 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded threadpool v1.7.1
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.2
[INFO] [stderr]   Downloaded tokio-executor v0.1.9
[INFO] [stderr]   Downloaded hermit-abi v0.1.6
[INFO] [stderr]   Downloaded crossbeam-epoch v0.8.0
[INFO] [stderr]   Downloaded num_cpus v1.12.0
[INFO] [stderr]   Downloaded memoffset v0.5.3
[INFO] [stderr]   Downloaded scopeguard v1.0.0
[INFO] [stderr]   Downloaded crossbeam-utils v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2020-08-29" "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] e8418a73a97607a1983aea0be1c2ea11fefc4bb6f065e92d9be7e2d2b474373e
[INFO] running `Command { std: "docker" "start" "-a" "e8418a73a97607a1983aea0be1c2ea11fefc4bb6f065e92d9be7e2d2b474373e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8418a73a97607a1983aea0be1c2ea11fefc4bb6f065e92d9be7e2d2b474373e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8418a73a97607a1983aea0be1c2ea11fefc4bb6f065e92d9be7e2d2b474373e", kill_on_drop: false }`
[INFO] [stdout] e8418a73a97607a1983aea0be1c2ea11fefc4bb6f065e92d9be7e2d2b474373e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 26d3e032fa84cde1dee213b4516d2e89f72d4af46b9285827822d140f547fa2e
[INFO] running `Command { std: "docker" "start" "-a" "26d3e032fa84cde1dee213b4516d2e89f72d4af46b9285827822d140f547fa2e", kill_on_drop: false }`
[INFO] [stderr]     Checking crossbeam-utils v0.7.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking tokio-executor v0.1.9
[INFO] [stderr]     Checking crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]  Documenting tokio-threadpool v0.1.18 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/pool/backup_stack.rs:17:27
[INFO] [stdout]    |
[INFO] [stdout] 17 | const STACK_MASK: usize = ((1 << 16) - 1);
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/worker/stack.rs:41:27
[INFO] [stdout]    |
[INFO] [stdout] 41 | const STACK_MASK: usize = ((1 << 16) - 1);
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.15s
[INFO] running `Command { std: "docker" "inspect" "26d3e032fa84cde1dee213b4516d2e89f72d4af46b9285827822d140f547fa2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26d3e032fa84cde1dee213b4516d2e89f72d4af46b9285827822d140f547fa2e", kill_on_drop: false }`
[INFO] [stdout] 26d3e032fa84cde1dee213b4516d2e89f72d4af46b9285827822d140f547fa2e