[INFO] fetching crate prc-rs 1.1.0...
[INFO] documenting prc-rs-1.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate prc-rs 1.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate prc-rs 1.1.0 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 prc-rs 1.1.0
[INFO] finished tweaking crates.io crate prc-rs 1.1.0
[INFO] tweaked toml for crates.io crate prc-rs 1.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate prc-rs 1.1.0 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]     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 hermit-abi v0.1.11
[INFO] [stderr]   Downloaded strum_macros v0.18.0
[INFO] [stderr]   Downloaded strum v0.18.0
[INFO] [stderr]   Downloaded syn v1.0.16
[INFO] [stderr]   Downloaded libc v0.2.69
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.14
[INFO] [stderr]   Downloaded quick-xml v0.18.1
[INFO] [stderr]   Downloaded structopt v0.3.14
[INFO] [stderr]   Downloaded compile-time-crc32 v0.1.2
[INFO] [stderr]   Downloaded structopt-derive v0.4.7
[INFO] [stderr]   Downloaded compile-time-crc32-impl v0.1.0
[INFO] [stderr]   Downloaded bimap v0.4.0
[INFO] [stderr]   Downloaded hash40 v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 0be3c4fa274a853ba54926971fff84e074c69b7baa9b957363734afb3087be68
[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" "0be3c4fa274a853ba54926971fff84e074c69b7baa9b957363734afb3087be68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0be3c4fa274a853ba54926971fff84e074c69b7baa9b957363734afb3087be68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0be3c4fa274a853ba54926971fff84e074c69b7baa9b957363734afb3087be68", kill_on_drop: false }`
[INFO] [stdout] 0be3c4fa274a853ba54926971fff84e074c69b7baa9b957363734afb3087be68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] ad215a6c7c14d6889f892e53eabe041fa6ebc74f008bdbd6052522303d962d99
[INFO] running `Command { std: "docker" "start" "-a" "ad215a6c7c14d6889f892e53eabe041fa6ebc74f008bdbd6052522303d962d99", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]     Checking bimap v0.4.0
[INFO] [stderr]     Checking quick-xml v0.18.1
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling compile-time-crc32-impl v0.1.0
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]     Checking compile-time-crc32 v0.1.2
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking hash40 v0.4.2
[INFO] [stderr]     Checking prc-rs v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting prc-rs v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufWriter`
[INFO] [stdout]  --> src/lib/xml/mod.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{BufRead, BufWriter, Read, Write, Error as ioError};
[INFO] [stdout]   |                        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.66s
[INFO] running `Command { std: "docker" "inspect" "ad215a6c7c14d6889f892e53eabe041fa6ebc74f008bdbd6052522303d962d99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad215a6c7c14d6889f892e53eabe041fa6ebc74f008bdbd6052522303d962d99", kill_on_drop: false }`
[INFO] [stdout] ad215a6c7c14d6889f892e53eabe041fa6ebc74f008bdbd6052522303d962d99