[INFO] fetching crate dkregistry 0.4.0...
[INFO] documenting dkregistry-0.4.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate dkregistry 0.4.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate dkregistry 0.4.0 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 dkregistry 0.4.0
[INFO] finished tweaking crates.io crate dkregistry 0.4.0
[INFO] tweaked toml for crates.io crate dkregistry 0.4.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate dkregistry 0.4.0 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 }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libflate v1.0.1
[INFO] [stderr]   Downloaded dirs v3.0.0
[INFO] [stderr]   Downloaded sha2 v0.9.0
[INFO] [stderr]   Downloaded hyper-rustls v0.19.0
[INFO] [stderr]   Downloaded block-buffer v0.8.0
[INFO] [stderr]   Downloaded async-stream v0.2.0
[INFO] [stderr]   Downloaded async-stream-impl v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] df38f1cbe74ff7dd256a35deadfee43d6244b1b9e2142b528d73e7182d43bb66
[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" "df38f1cbe74ff7dd256a35deadfee43d6244b1b9e2142b528d73e7182d43bb66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df38f1cbe74ff7dd256a35deadfee43d6244b1b9e2142b528d73e7182d43bb66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df38f1cbe74ff7dd256a35deadfee43d6244b1b9e2142b528d73e7182d43bb66", kill_on_drop: false }`
[INFO] [stdout] df38f1cbe74ff7dd256a35deadfee43d6244b1b9e2142b528d73e7182d43bb66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 3e35384c5d8996de4eb5b4b97b3fe59cc2789d6ce9dfb917e595b3e22990a612
[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" "3e35384c5d8996de4eb5b4b97b3fe59cc2789d6ce9dfb917e595b3e22990a612", 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]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking strum v0.18.0
[INFO] [stderr]     Checking base64 v0.12.2
[INFO] [stderr]    Compiling generic-array v0.14.2
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking encoding_rs v0.8.22
[INFO] [stderr]     Checking libflate v1.0.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.3
[INFO] [stderr]    Compiling async-stream-impl v0.2.0
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking openssl v0.10.26
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.8.0
[INFO] [stderr]     Checking sha2 v0.9.0
[INFO] [stderr]     Checking tokio v0.2.9
[INFO] [stderr]     Checking async-stream v0.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking native-tls v0.2.3
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking serde_ignored v0.1.2
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking hyper v0.13.1
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]  Documenting dkregistry v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/v2/manifest/manifest_schema1.rs:56:54
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn get_labels(&self, layer: usize) -> Option<(HashMap<String, String>)> {
[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 41.54s
[INFO] running `Command { std: "docker" "inspect" "3e35384c5d8996de4eb5b4b97b3fe59cc2789d6ce9dfb917e595b3e22990a612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e35384c5d8996de4eb5b4b97b3fe59cc2789d6ce9dfb917e595b3e22990a612", kill_on_drop: false }`
[INFO] [stdout] 3e35384c5d8996de4eb5b4b97b3fe59cc2789d6ce9dfb917e595b3e22990a612