[INFO] fetching crate lag 0.1.1...
[INFO] documenting lag-0.1.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate lag 0.1.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate lag 0.1.1 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 lag 0.1.1
[INFO] finished tweaking crates.io crate lag 0.1.1
[INFO] tweaked toml for crates.io crate lag 0.1.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate lag 0.1.1 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 lazysort v0.2.1
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.10
[INFO] [stderr]   Downloaded proc-macro-error v0.4.10
[INFO] [stderr]   Downloaded crossterm v0.16.0
[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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69b727c92f7b6e944b4c771a1ae06c3bc5303bae00ebc7b24532fad1719569af
[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" "69b727c92f7b6e944b4c771a1ae06c3bc5303bae00ebc7b24532fad1719569af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69b727c92f7b6e944b4c771a1ae06c3bc5303bae00ebc7b24532fad1719569af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69b727c92f7b6e944b4c771a1ae06c3bc5303bae00ebc7b24532fad1719569af", kill_on_drop: false }`
[INFO] [stdout] 69b727c92f7b6e944b4c771a1ae06c3bc5303bae00ebc7b24532fad1719569af
[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" "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] b607bd69eb40528688b6069fbb48e9a58ca50d6865292bdaa87a747f5f445d3f
[INFO] running `Command { std: "docker" "start" "-a" "b607bd69eb40528688b6069fbb48e9a58ca50d6865292bdaa87a747f5f445d3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking lazysort v0.2.1
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.10
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling proc-macro-error v0.4.10
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking backtrace v0.3.44
[INFO] [stderr]     Checking signal-hook v0.1.13
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking crossterm v0.14.2
[INFO] [stderr]     Checking crossterm v0.16.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking tui v0.8.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]    Compiling structopt-derive v0.4.2
[INFO] [stderr]     Checking structopt v0.3.9
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]  Documenting lag v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/app.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |         (0..self.lines.len())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 52.75s
[INFO] running `Command { std: "docker" "inspect" "b607bd69eb40528688b6069fbb48e9a58ca50d6865292bdaa87a747f5f445d3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b607bd69eb40528688b6069fbb48e9a58ca50d6865292bdaa87a747f5f445d3f", kill_on_drop: false }`
[INFO] [stdout] b607bd69eb40528688b6069fbb48e9a58ca50d6865292bdaa87a747f5f445d3f