[INFO] fetching crate rrc 0.1.9...
[INFO] documenting rrc-0.1.9 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rrc 0.1.9 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rrc 0.1.9 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 rrc 0.1.9
[INFO] finished tweaking crates.io crate rrc 0.1.9
[INFO] tweaked toml for crates.io crate rrc 0.1.9 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate rrc 0.1.9 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]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.13
[INFO] [stderr]   Downloaded scoped-tls-hkt v0.1.2
[INFO] [stderr]   Downloaded wepoll-binding v2.0.2
[INFO] [stderr]   Downloaded once_cell v1.4.0
[INFO] [stderr]   Downloaded send_wrapper v0.4.0
[INFO] [stderr]   Downloaded crossbeam-queue v0.2.2
[INFO] [stderr]   Downloaded gloo-timers v0.2.1
[INFO] [stderr]   Downloaded futures-timer v3.0.2
[INFO] [stderr]   Downloaded pin-project v0.4.19
[INFO] [stderr]   Downloaded kv-log-macro v1.0.6
[INFO] [stderr]   Downloaded wepoll-sys v2.0.0
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded web-sys v0.3.40
[INFO] [stderr]   Downloaded js-sys v0.3.40
[INFO] [stderr]   Downloaded async-std v1.6.0
[INFO] [stderr]   Downloaded piper v0.1.3
[INFO] [stderr]   Downloaded pin-project-internal v0.4.19
[INFO] [stderr]   Downloaded smol v0.1.11
[INFO] [stderr]   Downloaded async-task v3.0.0
[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" "+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] 25845e44d028ce433ae7834d8fc8803d8b42887028ceda4db5bc09044c836734
[INFO] running `Command { std: "docker" "start" "-a" "25845e44d028ce433ae7834d8fc8803d8b42887028ceda4db5bc09044c836734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25845e44d028ce433ae7834d8fc8803d8b42887028ceda4db5bc09044c836734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25845e44d028ce433ae7834d8fc8803d8b42887028ceda4db5bc09044c836734", kill_on_drop: false }`
[INFO] [stdout] 25845e44d028ce433ae7834d8fc8803d8b42887028ceda4db5bc09044c836734
[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" "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] 365ebc00b7c6043d451a8706c1d33817c33687ebfe610452a4b7903c75f3ad7f
[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" "365ebc00b7c6043d451a8706c1d33817c33687ebfe610452a4b7903c75f3ad7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.2
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking kv-log-macro v1.0.6
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.19
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking pin-project v0.4.19
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking piper v0.1.3
[INFO] [stderr]     Checking smol v0.1.11
[INFO] [stderr]     Checking async-std v1.6.0
[INFO] [stderr]  Documenting rrc v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/config.rs:13:48
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub static ref DEFAULT_REPO_ROOT: String = { default_root() };
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:14:42
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub static ref CONFIG_PATH: String = { config::get_config_path() };
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.81s
[INFO] running `Command { std: "docker" "inspect" "365ebc00b7c6043d451a8706c1d33817c33687ebfe610452a4b7903c75f3ad7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "365ebc00b7c6043d451a8706c1d33817c33687ebfe610452a4b7903c75f3ad7f", kill_on_drop: false }`
[INFO] [stdout] 365ebc00b7c6043d451a8706c1d33817c33687ebfe610452a4b7903c75f3ad7f