[INFO] fetching crate rs-collector 0.1.7...
[INFO] documenting rs-collector-0.1.7 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rs-collector 0.1.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rs-collector 0.1.7 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 rs-collector 0.1.7
[INFO] finished tweaking crates.io crate rs-collector 0.1.7
[INFO] tweaked toml for crates.io crate rs-collector 0.1.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 itertools v0.7.11
[INFO] [stderr]   Downloaded env_logger v0.3.5
[INFO] [stderr]   Downloaded utf8-ranges v0.1.3
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[INFO] [stderr]   Downloaded arrayref v0.3.6
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[INFO] [stderr]   Downloaded bit-vec v0.5.1
[INFO] [stderr]   Downloaded nom v2.2.1
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[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] 672ed23f8c72b759643d65db461957bce2dca368b3f229826726702d1d7def17
[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" "672ed23f8c72b759643d65db461957bce2dca368b3f229826726702d1d7def17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "672ed23f8c72b759643d65db461957bce2dca368b3f229826726702d1d7def17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "672ed23f8c72b759643d65db461957bce2dca368b3f229826726702d1d7def17", kill_on_drop: false }`
[INFO] [stdout] 672ed23f8c72b759643d65db461957bce2dca368b3f229826726702d1d7def17
[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] 1500e1f436ec3a4ce2d3f316b868de5ef1e98f162eafea8a21c5601285881643
[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" "1500e1f436ec3a4ce2d3f316b868de5ef1e98f162eafea8a21c5601285881643", 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 regex v1.0.6
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking md5 v0.3.8
[INFO] [stderr]     Checking try_from v0.2.2
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking separator v0.3.1
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]     Checking hex v0.2.0
[INFO] [stderr]     Checking is_executable v0.1.2
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking toml v0.1.30
[INFO] [stderr]     Checking toml v0.2.1
[INFO] [stderr]     Checking semver v0.8.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking memchr v0.1.11
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[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking get_if_addrs v0.5.3
[INFO] [stderr]    Compiling procinfo v0.4.2
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[INFO] [stderr]     Checking tokio-threadpool v0.1.18
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[INFO] [stderr]     Checking rand v0.3.23
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[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking chan v0.1.23
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking pbkdf2 v0.2.3
[INFO] [stderr]     Checking chan-signal v0.3.3
[INFO] [stderr]     Checking tokio-reactor v0.1.12
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[INFO] [stderr]     Checking bson v0.10.0
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]     Checking mongodb v0.3.12
[INFO] [stderr]     Checking mysql v13.1.0
[INFO] [stderr]     Checking hyper v0.12.35
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[INFO] [stderr]  Documenting rs-collector v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/collectors/mongo.rs:403:64
[INFO] [stdout]     |
[INFO] [stdout] 403 |         let diff = primary_date.unwrap().signed_duration_since((**d)).num_milliseconds() as f64;
[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 33.16s
[INFO] running `Command { std: "docker" "inspect" "1500e1f436ec3a4ce2d3f316b868de5ef1e98f162eafea8a21c5601285881643", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1500e1f436ec3a4ce2d3f316b868de5ef1e98f162eafea8a21c5601285881643", kill_on_drop: false }`
[INFO] [stdout] 1500e1f436ec3a4ce2d3f316b868de5ef1e98f162eafea8a21c5601285881643