[INFO] fetching crate joinkit 0.2.0...
[INFO] documenting joinkit-0.2.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate joinkit 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate joinkit 0.2.0 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 joinkit 0.2.0
[INFO] finished tweaking crates.io crate joinkit 0.2.0
[INFO] tweaked toml for crates.io crate joinkit 0.2.0 written to /workspace/builds/worker-8/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 0b00640a3436eb98cf2dbeaa6f2c6fbb8de70a2c9a2a0e6740d5ef6925cedefc
[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" "0b00640a3436eb98cf2dbeaa6f2c6fbb8de70a2c9a2a0e6740d5ef6925cedefc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b00640a3436eb98cf2dbeaa6f2c6fbb8de70a2c9a2a0e6740d5ef6925cedefc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b00640a3436eb98cf2dbeaa6f2c6fbb8de70a2c9a2a0e6740d5ef6925cedefc", kill_on_drop: false }`
[INFO] [stdout] 0b00640a3436eb98cf2dbeaa6f2c6fbb8de70a2c9a2a0e6740d5ef6925cedefc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] d7438ac1e317ef31e3dd1f39d10480e03ef76426b3276f2e47ebf47980edeeb6
[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" "d7438ac1e317ef31e3dd1f39d10480e03ef76426b3276f2e47ebf47980edeeb6", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking joinkit v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting joinkit v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/util.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]  --> src/util.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufRead, Write, BufWriter,};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.77s
[INFO] running `Command { std: "docker" "inspect" "d7438ac1e317ef31e3dd1f39d10480e03ef76426b3276f2e47ebf47980edeeb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7438ac1e317ef31e3dd1f39d10480e03ef76426b3276f2e47ebf47980edeeb6", kill_on_drop: false }`
[INFO] [stdout] d7438ac1e317ef31e3dd1f39d10480e03ef76426b3276f2e47ebf47980edeeb6