[INFO] fetching crate polona-dl 0.1.2...
[INFO] documenting polona-dl-0.1.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate polona-dl 0.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate polona-dl 0.1.2 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 polona-dl 0.1.2
[INFO] finished tweaking crates.io crate polona-dl 0.1.2
[INFO] tweaked toml for crates.io crate polona-dl 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate polona-dl 0.1.2 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 tokio-executor v0.1.9
[INFO] [stderr]   Downloaded serde_bytes v0.11.3
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.17
[INFO] [stderr]   Downloaded indicatif v0.11.0
[INFO] [stderr]   Downloaded numtoa v0.2.3
[INFO] [stderr]   Downloaded hyper_serde v0.11.1
[INFO] [stderr]   Downloaded ron v0.4.2
[INFO] [stderr]   Downloaded tokio-current-thread v0.1.6
[INFO] [stderr]   Downloaded tokio-reactor v0.1.11
[INFO] [stderr]   Downloaded image v0.22.4
[INFO] [stderr]   Downloaded tokio-timer v0.2.12
[INFO] [stderr]   Downloaded tokio-tcp v0.1.3
[INFO] [stderr]   Downloaded insta v0.10.1
[INFO] [stderr]   Downloaded tokio-sync v0.1.7
[INFO] [stderr]   Downloaded rstest v0.3.0
[INFO] [stderr]   Downloaded headers-core v0.1.1
[INFO] [stderr]   Downloaded curl-sys v0.4.25
[INFO] [stderr]   Downloaded backoff-futures v0.2.0
[INFO] [stderr]   Downloaded cookie v0.11.1
[INFO] [stderr]   Downloaded headers v0.2.3
[INFO] [stderr]   Downloaded console v0.9.1
[INFO] [stderr]   Downloaded ci_info v0.3.1
[INFO] [stderr]   Downloaded backoff v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 22998592ee8ac78615c80ee7ed7dc1338a76b3e7c9d15748271f209f5590cf3c
[INFO] running `Command { std: "docker" "start" "-a" "22998592ee8ac78615c80ee7ed7dc1338a76b3e7c9d15748271f209f5590cf3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22998592ee8ac78615c80ee7ed7dc1338a76b3e7c9d15748271f209f5590cf3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22998592ee8ac78615c80ee7ed7dc1338a76b3e7c9d15748271f209f5590cf3c", kill_on_drop: false }`
[INFO] [stdout] 22998592ee8ac78615c80ee7ed7dc1338a76b3e7c9d15748271f209f5590cf3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 9e70723b9a57d93893866699d162d3ed5d9961bbf9abc75f3fcd83a6a7a866d3
[INFO] running `Command { std: "docker" "start" "-a" "9e70723b9a57d93893866699d162d3ed5d9961bbf9abc75f3fcd83a6a7a866d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]    Compiling isahc v0.7.6
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]     Checking numtoa v0.2.3
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]    Compiling curl-sys v0.4.25
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking cookie v0.11.1
[INFO] [stderr]     Checking backtrace v0.3.42
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking sluice v0.4.2
[INFO] [stderr]     Checking backoff v0.1.5
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.17
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tokio-reactor v0.1.11
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking headers-core v0.1.1
[INFO] [stderr]     Checking headers v0.2.3
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking console v0.9.1
[INFO] [stderr]     Checking indicatif v0.11.0
[INFO] [stderr]     Checking better-panic v0.1.2
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking hyper v0.12.35
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.3
[INFO] [stderr]     Checking tokio v0.2.9
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking backoff-futures v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking serde_bytes v0.11.3
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking hyper_serde v0.11.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking surf v1.0.3
[INFO] [stderr]  Documenting polona-dl v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `Command { std: "docker" "inspect" "9e70723b9a57d93893866699d162d3ed5d9961bbf9abc75f3fcd83a6a7a866d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e70723b9a57d93893866699d162d3ed5d9961bbf9abc75f3fcd83a6a7a866d3", kill_on_drop: false }`
[INFO] [stdout] 9e70723b9a57d93893866699d162d3ed5d9961bbf9abc75f3fcd83a6a7a866d3