[INFO] fetching crate wf2_core 0.31.0...
[INFO] documenting wf2_core-0.31.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate wf2_core 0.31.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate wf2_core 0.31.0 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 wf2_core 0.31.0
[INFO] finished tweaking crates.io crate wf2_core 0.31.0
[INFO] tweaked toml for crates.io crate wf2_core 0.31.0 written to /workspace/builds/worker-0/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 from_file v0.1.3
[INFO] [stderr]   Downloaded filepath v0.1.1
[INFO] [stderr]   Downloaded env_proc v0.1.0
[INFO] [stderr]   Downloaded from_file_derive v0.1.3
[INFO] [stderr]   Downloaded doc_link v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 1ce0e515ed760e48ad6ead64a2a075e3375bfdbe6b54c5c7644a861511f66912
[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" "1ce0e515ed760e48ad6ead64a2a075e3375bfdbe6b54c5c7644a861511f66912", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ce0e515ed760e48ad6ead64a2a075e3375bfdbe6b54c5c7644a861511f66912", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ce0e515ed760e48ad6ead64a2a075e3375bfdbe6b54c5c7644a861511f66912", kill_on_drop: false }`
[INFO] [stdout] 1ce0e515ed760e48ad6ead64a2a075e3375bfdbe6b54c5c7644a861511f66912
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 1a986f1e176d869cb138d20d9bc6fafdd99105967e9d7184054c268a4d1191e7
[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" "1a986f1e176d869cb138d20d9bc6fafdd99105967e9d7184054c268a4d1191e7", kill_on_drop: false }`
[INFO] [stderr]     Checking filepath v0.1.1
[INFO] [stderr]     Checking snailquote v0.2.0
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking users v0.9.1
[INFO] [stderr]     Checking terminal_size v0.1.13
[INFO] [stderr]     Checking bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking libmath v0.2.1
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]    Compiling from_file_derive v0.1.3
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling structopt-derive v0.4.10
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking from_file v0.1.3
[INFO] [stderr]    Compiling env_proc v0.1.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking zip v0.5.6
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking hyper v0.12.35
[INFO] [stderr]     Checking structopt v0.3.17
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]    Compiling doc_link v0.1.0
[INFO] [stderr]  Documenting wf2_core v0.31.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.24s
[INFO] running `Command { std: "docker" "inspect" "1a986f1e176d869cb138d20d9bc6fafdd99105967e9d7184054c268a4d1191e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a986f1e176d869cb138d20d9bc6fafdd99105967e9d7184054c268a4d1191e7", kill_on_drop: false }`
[INFO] [stdout] 1a986f1e176d869cb138d20d9bc6fafdd99105967e9d7184054c268a4d1191e7