[INFO] fetching crate spruce 0.3.0...
[INFO] documenting spruce-0.3.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate spruce 0.3.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate spruce 0.3.0 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 spruce 0.3.0
[INFO] finished tweaking crates.io crate spruce 0.3.0
[INFO] tweaked toml for crates.io crate spruce 0.3.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate spruce 0.3.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded derive_builder v0.8.0
[INFO] [stderr]   Downloaded structopt v0.3.3
[INFO] [stderr]   Downloaded derive_builder_core v0.8.0
[INFO] [stderr]   Downloaded darling v0.10.1
[INFO] [stderr]   Downloaded isatty v0.1.9
[INFO] [stderr]   Downloaded tint v1.0.1
[INFO] [stderr]   Downloaded structopt-derive v0.3.3
[INFO] [stderr]   Downloaded darling_core v0.10.1
[INFO] [stderr]   Downloaded darling_macro v0.10.1
[INFO] [stderr]   Downloaded ptree v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 3ced313ef357cfbb18dc424fb6c101c88435d764ebd746fb528f925beb8dbdff
[INFO] running `Command { std: "docker" "start" "-a" "3ced313ef357cfbb18dc424fb6c101c88435d764ebd746fb528f925beb8dbdff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ced313ef357cfbb18dc424fb6c101c88435d764ebd746fb528f925beb8dbdff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ced313ef357cfbb18dc424fb6c101c88435d764ebd746fb528f925beb8dbdff", kill_on_drop: false }`
[INFO] [stdout] 3ced313ef357cfbb18dc424fb6c101c88435d764ebd746fb528f925beb8dbdff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] e0713e2998127aad4b25567421f66f1b733caf60cbd33b48b877253f3b5ab7db
[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" "e0713e2998127aad4b25567421f66f1b733caf60cbd33b48b877253f3b5ab7db", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling libc v0.2.64
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling derive_builder v0.8.0
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking tint v1.0.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking serde-hjson v0.8.2
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking serde-value v0.5.3
[INFO] [stderr]     Checking config v0.9.3
[INFO] [stderr]    Compiling darling_core v0.10.1
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling structopt-derive v0.3.3
[INFO] [stderr]    Compiling darling_macro v0.10.1
[INFO] [stderr]     Checking structopt v0.3.3
[INFO] [stderr]    Compiling darling v0.10.1
[INFO] [stderr]    Compiling derive_builder_core v0.8.0
[INFO] [stderr]     Checking ptree v0.2.1
[INFO] [stderr]  Documenting spruce v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.41s
[INFO] running `Command { std: "docker" "inspect" "e0713e2998127aad4b25567421f66f1b733caf60cbd33b48b877253f3b5ab7db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0713e2998127aad4b25567421f66f1b733caf60cbd33b48b877253f3b5ab7db", kill_on_drop: false }`
[INFO] [stdout] e0713e2998127aad4b25567421f66f1b733caf60cbd33b48b877253f3b5ab7db