[INFO] fetching crate trimmer 0.3.6...
[INFO] documenting trimmer-0.3.6 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate trimmer 0.3.6 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate trimmer 0.3.6 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate trimmer 0.3.6
[INFO] finished tweaking crates.io crate trimmer 0.3.6
[INFO] tweaked toml for crates.io crate trimmer 0.3.6 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b45e76d6c8724711f326ae88cb57361183ed005f41bf2fef5a9f7ebb3ee153af
[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" "b45e76d6c8724711f326ae88cb57361183ed005f41bf2fef5a9f7ebb3ee153af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b45e76d6c8724711f326ae88cb57361183ed005f41bf2fef5a9f7ebb3ee153af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b45e76d6c8724711f326ae88cb57361183ed005f41bf2fef5a9f7ebb3ee153af", kill_on_drop: false }`
[INFO] [stdout] b45e76d6c8724711f326ae88cb57361183ed005f41bf2fef5a9f7ebb3ee153af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcc905a98d940e61195f1be6ab4c22050552648f0def51b9fe70bd4c51b6d435
[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" "bcc905a98d940e61195f1be6ab4c22050552648f0def51b9fe70bd4c51b6d435", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking ucd-util v0.1.8
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]     Checking ascii v0.7.1
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking combine v2.5.2
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]  Documenting trimmer v0.3.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/number.rs:138:27
[INFO] [stdout]     |
[INFO] [stdout] 138 |             b.checked_sub((-a as u64)).map(val)
[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 method argument
[INFO] [stdout]    --> src/number.rs:162:27
[INFO] [stdout]     |
[INFO] [stdout] 162 |             a.checked_add((-b as u64)).map(val)
[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 12.81s
[INFO] running `Command { std: "docker" "inspect" "bcc905a98d940e61195f1be6ab4c22050552648f0def51b9fe70bd4c51b6d435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcc905a98d940e61195f1be6ab4c22050552648f0def51b9fe70bd4c51b6d435", kill_on_drop: false }`
[INFO] [stdout] bcc905a98d940e61195f1be6ab4c22050552648f0def51b9fe70bd4c51b6d435
