[INFO] fetching crate bender 0.20.0...
[INFO] documenting bender-0.20.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate bender 0.20.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate bender 0.20.0 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bender 0.20.0
[INFO] finished tweaking crates.io crate bender 0.20.0
[INFO] tweaked toml for crates.io crate bender 0.20.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate bender 0.20.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3fc71d4f3806308824c506191639d0a61cb1891539ad60a3bc66b877255cba4
[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" "c3fc71d4f3806308824c506191639d0a61cb1891539ad60a3bc66b877255cba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3fc71d4f3806308824c506191639d0a61cb1891539ad60a3bc66b877255cba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3fc71d4f3806308824c506191639d0a61cb1891539ad60a3bc66b877255cba4", kill_on_drop: false }`
[INFO] [stdout] c3fc71d4f3806308824c506191639d0a61cb1891539ad60a3bc66b877255cba4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "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] 0d68b2fb0031e9b29bba65af8d588a1c700d9b07731dc719b9a30a939faaf1b2
[INFO] running `Command { std: "docker" "start" "-a" "0d68b2fb0031e9b29bba65af8d588a1c700d9b07731dc719b9a30a939faaf1b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking futures v0.1.18
[INFO] [stderr]    Compiling typenum v1.9.0
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking constant_time_eq v0.1.3
[INFO] [stderr]     Checking num-traits v0.1.42
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]     Checking linked-hash-map v0.5.0
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking either v1.5.1
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking typed-arena v1.3.0
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking dirs v1.0.4
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking clap v2.29.2
[INFO] [stderr]     Checking mio v0.6.12
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]     Checking digest v0.7.2
[INFO] [stderr]     Checking crypto-mac v0.5.2
[INFO] [stderr]     Checking blake2 v0.7.0
[INFO] [stderr]     Checking mio-uds v0.6.4
[INFO] [stderr]     Checking tokio-io v0.1.4
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tokio-core v0.1.12
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]     Checking tokio-signal v0.1.3
[INFO] [stderr]     Checking tokio-process v0.1.5
[INFO] [stderr]     Checking serde_json v1.0.9
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]  Documenting bender v0.20.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.70s
[INFO] running `Command { std: "docker" "inspect" "0d68b2fb0031e9b29bba65af8d588a1c700d9b07731dc719b9a30a939faaf1b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d68b2fb0031e9b29bba65af8d588a1c700d9b07731dc719b9a30a939faaf1b2", kill_on_drop: false }`
[INFO] [stdout] 0d68b2fb0031e9b29bba65af8d588a1c700d9b07731dc719b9a30a939faaf1b2