[INFO] fetching crate mongodb-helper 0.1.6...
[INFO] documenting mongodb-helper-0.1.6 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate mongodb-helper 0.1.6 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mongodb-helper 0.1.6 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 mongodb-helper 0.1.6
[INFO] finished tweaking crates.io crate mongodb-helper 0.1.6
[INFO] tweaked toml for crates.io crate mongodb-helper 0.1.6 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mongodb v0.9.2
[INFO] [stderr]   Downloaded os_info v1.3.3
[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] 2ada3180366eff203dbfed0de1d895aeff427372dbc676d142d6cfea98c1756f
[INFO] running `Command { std: "docker" "start" "-a" "2ada3180366eff203dbfed0de1d895aeff427372dbc676d142d6cfea98c1756f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ada3180366eff203dbfed0de1d895aeff427372dbc676d142d6cfea98c1756f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ada3180366eff203dbfed0de1d895aeff427372dbc676d142d6cfea98c1756f", kill_on_drop: false }`
[INFO] [stdout] 2ada3180366eff203dbfed0de1d895aeff427372dbc676d142d6cfea98c1756f
[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] efc0af2bfd22cc0ed547b715a8136a5b90b3146aa93fbbbaec04c7621e2469de
[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" "efc0af2bfd22cc0ed547b715a8136a5b90b3146aa93fbbbaec04c7621e2469de", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling os_info v1.3.3
[INFO] [stderr]     Checking try_from v0.2.2
[INFO] [stderr]     Checking separator v0.3.1
[INFO] [stderr]     Checking version_check v0.9.2
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking semver v0.8.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking crypto-mac v0.6.2
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.5
[INFO] [stderr]     Checking webpki-roots v0.18.0
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling enum-as-inner v0.3.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_with_macros v1.1.0
[INFO] [stderr]     Checking md-5 v0.7.0
[INFO] [stderr]     Checking sha-1 v0.7.0
[INFO] [stderr]     Checking resolv-conf v0.6.3
[INFO] [stderr]     Checking hmac v0.6.3
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking r2d2 v0.8.9
[INFO] [stderr]     Checking pbkdf2 v0.2.3
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking textnonce v0.6.5
[INFO] [stderr]     Checking scan_fmt v0.1.3
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]     Checking serde_with v1.4.0
[INFO] [stderr]     Checking bson v0.13.0
[INFO] [stderr]     Checking bson v0.14.1
[INFO] [stderr]     Checking mongodb v0.3.12
[INFO] [stderr]     Checking r2d2-mongodb v0.2.2
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking trust-dns-proto v0.19.5
[INFO] [stderr]     Checking trust-dns-resolver v0.19.5
[INFO] [stderr]    Compiling typed-builder v0.3.0
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]     Checking mongodb v0.9.2
[INFO] [stderr]  Documenting mongodb-helper v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 16s
[INFO] running `Command { std: "docker" "inspect" "efc0af2bfd22cc0ed547b715a8136a5b90b3146aa93fbbbaec04c7621e2469de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efc0af2bfd22cc0ed547b715a8136a5b90b3146aa93fbbbaec04c7621e2469de", kill_on_drop: false }`
[INFO] [stdout] efc0af2bfd22cc0ed547b715a8136a5b90b3146aa93fbbbaec04c7621e2469de