[INFO] fetching crate vebtrees 0.1.4...
[INFO] documenting vebtrees-0.1.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate vebtrees 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate vebtrees 0.1.4 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 vebtrees 0.1.4
[INFO] finished tweaking crates.io crate vebtrees 0.1.4
[INFO] tweaked toml for crates.io crate vebtrees 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] 782ab4dc7380b70388f3d4e1d5c968c3fff5a41b7be9124239483e32ba4a6569
[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" "782ab4dc7380b70388f3d4e1d5c968c3fff5a41b7be9124239483e32ba4a6569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "782ab4dc7380b70388f3d4e1d5c968c3fff5a41b7be9124239483e32ba4a6569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "782ab4dc7380b70388f3d4e1d5c968c3fff5a41b7be9124239483e32ba4a6569", kill_on_drop: false }`
[INFO] [stdout] 782ab4dc7380b70388f3d4e1d5c968c3fff5a41b7be9124239483e32ba4a6569
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] b29e032d8bb59bb84c99587e72f2b15e61d8b48b354eb163d76fc547f09e8bba
[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" "b29e032d8bb59bb84c99587e72f2b15e61d8b48b354eb163d76fc547f09e8bba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting vebtrees v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:285:61
[INFO] [stdout]     |
[INFO] [stdout] 285 |   ...                   self.min = Some((first_cluster
[INFO] [stdout]     |  _______________________________________^
[INFO] [stdout] 286 | | ...                                   * self.children.len() as T
[INFO] [stdout] 287 | | ...                                    + min));
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 285 |                                             self.min = Some(first_cluster
[INFO] [stdout] 286 |                                                             * self.children.len() as T
[INFO] [stdout] 287 |                                                              + min);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:312:61
[INFO] [stdout]     |
[INFO] [stdout] 312 |   ...                   self.max = Some((last_cluster
[INFO] [stdout]     |  _______________________________________^
[INFO] [stdout] 313 | | ...                                    * self.children.len() as T
[INFO] [stdout] 314 | | ...                                    + max));
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 312 |                                             self.max = Some(last_cluster
[INFO] [stdout] 313 |                                                              * self.children.len() as T
[INFO] [stdout] 314 |                                                              + max);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.49s
[INFO] running `Command { std: "docker" "inspect" "b29e032d8bb59bb84c99587e72f2b15e61d8b48b354eb163d76fc547f09e8bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b29e032d8bb59bb84c99587e72f2b15e61d8b48b354eb163d76fc547f09e8bba", kill_on_drop: false }`
[INFO] [stdout] b29e032d8bb59bb84c99587e72f2b15e61d8b48b354eb163d76fc547f09e8bba