[INFO] fetching crate libipld 0.4.0...
[INFO] documenting libipld-0.4.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate libipld 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate libipld 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 libipld 0.4.0
[INFO] finished tweaking crates.io crate libipld 0.4.0
[INFO] tweaked toml for crates.io crate libipld 0.4.0 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 permutohedron v0.2.4
[INFO] [stderr]   Downloaded libipld-macro v0.4.0
[INFO] [stderr]   Downloaded cached v0.18.0
[INFO] [stderr]   Downloaded libipld-cbor-derive v0.4.0
[INFO] [stderr]   Downloaded async-attributes v1.1.1
[INFO] [stderr]   Downloaded libipld-cbor v0.4.0
[INFO] [stderr]   Downloaded libipld-json v0.4.0
[INFO] [stderr]   Downloaded proptest v0.9.6
[INFO] [stderr]   Downloaded libipld-pb v0.4.0
[INFO] [stderr]   Downloaded model v0.1.2
[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] 28c87f875837ecd9efbca22a5f043b01cb9b7bee07b635fe2a3dd7fe2b5b58c5
[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" "28c87f875837ecd9efbca22a5f043b01cb9b7bee07b635fe2a3dd7fe2b5b58c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28c87f875837ecd9efbca22a5f043b01cb9b7bee07b635fe2a3dd7fe2b5b58c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28c87f875837ecd9efbca22a5f043b01cb9b7bee07b635fe2a3dd7fe2b5b58c5", kill_on_drop: false }`
[INFO] [stdout] 28c87f875837ecd9efbca22a5f043b01cb9b7bee07b635fe2a3dd7fe2b5b58c5
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d7365affdbf0f02aa8ef5638a0764c3a7d9c4d0de565bd1e1112cc0c5d953583
[INFO] running `Command { std: "docker" "start" "-a" "d7365affdbf0f02aa8ef5638a0764c3a7d9c4d0de565bd1e1112cc0c5d953583", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling either v1.6.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking fastrand v1.3.5
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]     Checking event-listener v2.4.0
[INFO] [stderr]    Compiling multimap v0.8.2
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.2
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking cached v0.18.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking async-mutex v1.2.0
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking async-channel v1.4.1
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking strobe-rs v0.5.4
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking polling v0.1.7
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.8
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]    Compiling libipld-cbor-derive v0.4.0
[INFO] [stderr]     Checking async-std v1.6.3
[INFO] [stderr]     Checking data-encoding-macro v0.1.8
[INFO] [stderr]     Checking multibase v0.8.0
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling libipld-pb v0.4.0
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling parity-scale-codec-derive v1.2.1
[INFO] [stderr]    Compiling tiny-multihash-derive v0.4.0
[INFO] [stderr]     Checking parity-scale-codec v1.3.4
[INFO] [stderr]     Checking tiny-multihash v0.4.5
[INFO] [stderr]     Checking tiny-cid v0.2.5
[INFO] [stderr]     Checking libipld-core v0.4.0
[INFO] [stderr]     Checking libipld-cbor v0.4.0
[INFO] [stderr]     Checking libipld-macro v0.4.0
[INFO] [stderr]     Checking libipld-json v0.4.0
[INFO] [stderr]  Documenting libipld v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 46s
[INFO] running `Command { std: "docker" "inspect" "d7365affdbf0f02aa8ef5638a0764c3a7d9c4d0de565bd1e1112cc0c5d953583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7365affdbf0f02aa8ef5638a0764c3a7d9c4d0de565bd1e1112cc0c5d953583", kill_on_drop: false }`
[INFO] [stdout] d7365affdbf0f02aa8ef5638a0764c3a7d9c4d0de565bd1e1112cc0c5d953583