[INFO] fetching crate language-reporting 0.4.0...
[INFO] documenting language-reporting-0.4.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate language-reporting 0.4.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate language-reporting 0.4.0 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 language-reporting 0.4.0
[INFO] finished tweaking crates.io crate language-reporting 0.4.0
[INFO] tweaked toml for crates.io crate language-reporting 0.4.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate language-reporting 0.4.0 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 regex v1.0.5
[INFO] [stderr]   Downloaded humantime v1.1.1
[INFO] [stderr]   Downloaded itertools v0.7.8
[INFO] [stderr]   Downloaded structopt-derive v0.2.13
[INFO] [stderr]   Downloaded byteorder v1.2.4
[INFO] [stderr]   Downloaded bitflags v1.0.3
[INFO] [stderr]   Downloaded unindent v0.1.3
[INFO] [stderr]   Downloaded env_logger v0.5.11
[INFO] [stderr]   Downloaded quote v0.6.4
[INFO] [stderr]   Downloaded heck v0.3.0
[INFO] [stderr]   Downloaded ucd-util v0.1.1
[INFO] [stderr]   Downloaded lazy_static v1.0.2
[INFO] [stderr]   Downloaded winapi v0.3.5
[INFO] [stderr]   Downloaded derive-new v0.5.6
[INFO] [stderr]   Downloaded regex-syntax v0.6.2
[INFO] [stderr]   Downloaded wincolor v1.0.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.9
[INFO] [stderr]   Downloaded structopt v0.2.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 4fe895c921e66e6b1a9cff33007f9f18fed607c0102f7b792a1afb6048e60bd5
[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" "4fe895c921e66e6b1a9cff33007f9f18fed607c0102f7b792a1afb6048e60bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fe895c921e66e6b1a9cff33007f9f18fed607c0102f7b792a1afb6048e60bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fe895c921e66e6b1a9cff33007f9f18fed607c0102f7b792a1afb6048e60bd5", kill_on_drop: false }`
[INFO] [stdout] 4fe895c921e66e6b1a9cff33007f9f18fed607c0102f7b792a1afb6048e60bd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 048c65a30f67546a9f53701b6a9929fb4317bd6b44fc97815caf7855f900bf75
[INFO] running `Command { std: "docker" "start" "-a" "048c65a30f67546a9f53701b6a9929fb4317bd6b44fc97815caf7855f900bf75", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]     Checking render-tree v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling derive-new v0.5.6
[INFO] [stderr]  Documenting language-reporting v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.39s
[INFO] running `Command { std: "docker" "inspect" "048c65a30f67546a9f53701b6a9929fb4317bd6b44fc97815caf7855f900bf75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "048c65a30f67546a9f53701b6a9929fb4317bd6b44fc97815caf7855f900bf75", kill_on_drop: false }`
[INFO] [stdout] 048c65a30f67546a9f53701b6a9929fb4317bd6b44fc97815caf7855f900bf75