[INFO] fetching crate imghdr 0.7.0...
[INFO] documenting imghdr-0.7.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate imghdr 0.7.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate imghdr 0.7.0 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 imghdr 0.7.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate imghdr 0.7.0
[INFO] tweaked toml for crates.io crate imghdr 0.7.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cloudabi v0.0.3
[INFO] [stderr]   Downloaded rustc_version v0.2.3
[INFO] [stderr]   Downloaded criterion-plot v0.3.1
[INFO] [stderr]   Downloaded semver v0.9.0
[INFO] [stderr]   Downloaded unicode-width v0.1.8
[INFO] [stderr]   Downloaded textwrap v0.11.0
[INFO] [stderr]   Downloaded atty v0.2.14
[INFO] [stderr]   Downloaded rayon-core v1.8.0
[INFO] [stderr]   Downloaded crossbeam-utils v0.7.2
[INFO] [stderr]   Downloaded crossbeam-channel v0.4.3
[INFO] [stderr]   Downloaded rdrand v0.4.0
[INFO] [stderr]   Downloaded itertools v0.8.2
[INFO] [stderr]   Downloaded fuchsia-cprng v0.1.1
[INFO] [stderr]   Downloaded rand_xoshiro v0.1.0
[INFO] [stderr]   Downloaded semver-parser v0.7.0
[INFO] [stderr]   Downloaded cast v0.2.3
[INFO] [stderr]   Downloaded bstr v0.2.13
[INFO] [stderr]   Downloaded clap v2.33.3
[INFO] [stderr]   Downloaded maybe-uninit v2.0.0
[INFO] [stderr]   Downloaded csv-core v0.1.10
[INFO] [stderr]   Downloaded num-traits v0.2.12
[INFO] [stderr]   Downloaded either v1.6.0
[INFO] [stderr]   Downloaded memoffset v0.5.5
[INFO] [stderr]   Downloaded autocfg v1.0.1
[INFO] [stderr]   Downloaded num_cpus v1.13.0
[INFO] [stderr]   Downloaded scopeguard v1.1.0
[INFO] [stderr]   Downloaded regex-automata v0.1.9
[INFO] [stderr]   Downloaded unicode-xid v0.2.1
[INFO] [stderr]   Downloaded criterion v0.2.11
[INFO] [stderr]   Downloaded serde_derive v1.0.115
[INFO] [stderr]   Downloaded syn v1.0.39
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.3
[INFO] [stderr]   Downloaded serde v1.0.115
[INFO] [stderr]   Downloaded winapi-util v0.1.5
[INFO] [stderr]   Downloaded ryu v1.0.5
[INFO] [stderr]   Downloaded serde_json v1.0.57
[INFO] [stderr]   Downloaded tinytemplate v1.1.0
[INFO] [stderr]   Downloaded rand_core v0.4.2
[INFO] [stderr]   Downloaded same-file v1.0.6
[INFO] [stderr]   Downloaded csv v1.1.3
[INFO] [stderr]   Downloaded rand_os v0.1.3
[INFO] [stderr]   Downloaded rand_core v0.3.1
[INFO] [stderr]   Downloaded libc v0.2.76
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded hermit-abi v0.1.15
[INFO] [stderr]   Downloaded itoa v0.4.6
[INFO] [stderr]   Downloaded winapi v0.3.9
[INFO] [stderr]   Downloaded crossbeam-epoch v0.8.2
[INFO] [stderr]   Downloaded walkdir v2.3.1
[INFO] [stderr]   Downloaded quote v1.0.7
[INFO] [stderr]   Downloaded rayon v1.4.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.19
[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] 1f7e8be480dde03f3bec58190ecb2f38573d0d71b36d9750745f5964263d125f
[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" "1f7e8be480dde03f3bec58190ecb2f38573d0d71b36d9750745f5964263d125f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f7e8be480dde03f3bec58190ecb2f38573d0d71b36d9750745f5964263d125f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f7e8be480dde03f3bec58190ecb2f38573d0d71b36d9750745f5964263d125f", kill_on_drop: false }`
[INFO] [stdout] 1f7e8be480dde03f3bec58190ecb2f38573d0d71b36d9750745f5964263d125f
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c503300ef2302c1fb189c64251f193316e8567ce2666a0c4d8910b8646ea8061
[INFO] running `Command { std: "docker" "start" "-a" "c503300ef2302c1fb189c64251f193316e8567ce2666a0c4d8910b8646ea8061", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting imghdr v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.13s
[INFO] running `Command { std: "docker" "inspect" "c503300ef2302c1fb189c64251f193316e8567ce2666a0c4d8910b8646ea8061", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c503300ef2302c1fb189c64251f193316e8567ce2666a0c4d8910b8646ea8061", kill_on_drop: false }`
[INFO] [stdout] c503300ef2302c1fb189c64251f193316e8567ce2666a0c4d8910b8646ea8061