[INFO] fetching crate musicbrainz_rs 0.2.0...
[INFO] documenting musicbrainz_rs-0.2.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate musicbrainz_rs 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate musicbrainz_rs 0.2.0 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 musicbrainz_rs 0.2.0
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[INFO] finished tweaking crates.io crate musicbrainz_rs 0.2.0
[INFO] tweaked toml for crates.io crate musicbrainz_rs 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate musicbrainz_rs 0.2.0 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 }`
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[INFO] [stdout] 226393c26b07acdd27c6439c089648c4366c5d92dd60d1e1c4d66730f5fce259
[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" "226393c26b07acdd27c6439c089648c4366c5d92dd60d1e1c4d66730f5fce259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "226393c26b07acdd27c6439c089648c4366c5d92dd60d1e1c4d66730f5fce259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "226393c26b07acdd27c6439c089648c4366c5d92dd60d1e1c4d66730f5fce259", kill_on_drop: false }`
[INFO] [stdout] 226393c26b07acdd27c6439c089648c4366c5d92dd60d1e1c4d66730f5fce259
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] a75aa02d1c2097eef31ef3237aa17d9075ad30dbe092d714591eaabc13d7c39f
[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" "a75aa02d1c2097eef31ef3237aa17d9075ad30dbe092d714591eaabc13d7c39f", kill_on_drop: false }`
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[INFO] [stderr]  Documenting musicbrainz_rs v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/config.rs:10:53
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub static ref HTTP_CLIENT: MusicBrainzClient = { init_http_client() };
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` 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 55.23s
[INFO] running `Command { std: "docker" "inspect" "a75aa02d1c2097eef31ef3237aa17d9075ad30dbe092d714591eaabc13d7c39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a75aa02d1c2097eef31ef3237aa17d9075ad30dbe092d714591eaabc13d7c39f", kill_on_drop: false }`
[INFO] [stdout] a75aa02d1c2097eef31ef3237aa17d9075ad30dbe092d714591eaabc13d7c39f