[INFO] cloning repository https://github.com/sarashino/rialto-chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sarashino/rialto-chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsarashino%2Frialto-chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsarashino%2Frialto-chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 369c3a1540000d2ff75e8845c6d7b86a47ef261d
[INFO] documenting sarashino/rialto-chat against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsarashino%2Frialto-chat" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sarashino/rialto-chat 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 git repo https://github.com/sarashino/rialto-chat
[INFO] finished tweaking git repo https://github.com/sarashino/rialto-chat
[INFO] tweaked toml for git repo https://github.com/sarashino/rialto-chat written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sarashino/rialto-chat 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 websocket v0.22.3
[INFO] [stderr]   Downloaded alphanumeric-sort v1.0.6
[INFO] [stderr]   Downloaded syn v0.15.28
[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] [stdout] 3e481577f9b504803a735c5e4b487bf5c14c27bad7ccac0de676523d9e4d553a
[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" "3e481577f9b504803a735c5e4b487bf5c14c27bad7ccac0de676523d9e4d553a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e481577f9b504803a735c5e4b487bf5c14c27bad7ccac0de676523d9e4d553a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e481577f9b504803a735c5e4b487bf5c14c27bad7ccac0de676523d9e4d553a", kill_on_drop: false }`
[INFO] [stdout] 3e481577f9b504803a735c5e4b487bf5c14c27bad7ccac0de676523d9e4d553a
[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] 4c25a69899e57bb5fec3d9e021a7085e15055c1482e49cf7f0a37052d5d1cabd
[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" "4c25a69899e57bb5fec3d9e021a7085e15055c1482e49cf7f0a37052d5d1cabd", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.30
[INFO] [stderr]    Compiling openssl v0.10.19
[INFO] [stderr]     Checking fallible-iterator v0.1.6
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]     Checking alphanumeric-sort v1.0.6
[INFO] [stderr]     Checking tokio-sync v0.1.3
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking tokio-executor v0.1.6
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking stringprep v0.1.2
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking socket2 v0.3.8
[INFO] [stderr]     Checking http v0.1.16
[INFO] [stderr]    Compiling syn v0.15.28
[INFO] [stderr]     Checking r2d2 v0.8.3
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking tokio-threadpool v0.1.12
[INFO] [stderr]     Checking tokio-current-thread v0.1.5
[INFO] [stderr]     Checking tokio-timer v0.2.10
[INFO] [stderr]     Checking hyper v0.10.15
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking postgres-protocol v0.3.2
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]    Compiling openssl-sys v0.9.42
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking postgres-shared v0.4.2
[INFO] [stderr]     Checking tokio v0.1.16
[INFO] [stderr]     Checking postgres v0.15.2
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]     Checking r2d2_postgres v0.14.0
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking websocket v0.22.3
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]  Documenting rtchat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:148:36
[INFO] [stdout]     |
[INFO] [stdout] 148 |                         for idx in (0..notifier.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 49.31s
[INFO] running `Command { std: "docker" "inspect" "4c25a69899e57bb5fec3d9e021a7085e15055c1482e49cf7f0a37052d5d1cabd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c25a69899e57bb5fec3d9e021a7085e15055c1482e49cf7f0a37052d5d1cabd", kill_on_drop: false }`
[INFO] [stdout] 4c25a69899e57bb5fec3d9e021a7085e15055c1482e49cf7f0a37052d5d1cabd