[INFO] fetching crate unix_exec_piper 0.1.4...
[INFO] documenting unix_exec_piper-0.1.4 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate unix_exec_piper 0.1.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate unix_exec_piper 0.1.4 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unix_exec_piper 0.1.4
[INFO] finished tweaking crates.io crate unix_exec_piper 0.1.4
[INFO] tweaked toml for crates.io crate unix_exec_piper 0.1.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate unix_exec_piper 0.1.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded errno v0.2.6
[INFO] [stderr]   Downloaded errno-dragonfly v0.1.1
[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-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad63d47311f4a8b89bc86b5d1d71b9a4e115ea15a229e18906fb832dab1c3477
[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" "ad63d47311f4a8b89bc86b5d1d71b9a4e115ea15a229e18906fb832dab1c3477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad63d47311f4a8b89bc86b5d1d71b9a4e115ea15a229e18906fb832dab1c3477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad63d47311f4a8b89bc86b5d1d71b9a4e115ea15a229e18906fb832dab1c3477", kill_on_drop: false }`
[INFO] [stdout] ad63d47311f4a8b89bc86b5d1d71b9a4e115ea15a229e18906fb832dab1c3477
[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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3882140843685d6129f2d7f62369cec7f0ae257b7b9c1018f5c4cba82af1942
[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" "a3882140843685d6129f2d7f62369cec7f0ae257b7b9c1018f5c4cba82af1942", kill_on_drop: false }`
[INFO] [stderr]     Checking errno v0.2.6
[INFO] [stderr]     Checking unix_exec_piper v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting unix_exec_piper v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:132:41
[INFO] [stdout]     |
[INFO] [stdout] 132 |             let exited_normally: bool = unsafe { libc::WIFEXITED(status_code) };
[INFO] [stdout]     |                                         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/lib.rs:144:46
[INFO] [stdout]     |
[INFO] [stdout] 144 |                 let exit_code: libc::c_int = unsafe { libc::WEXITSTATUS(status_code) };
[INFO] [stdout]     |                                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: Rust code block is empty
[INFO] [stdout]   --> src/pipe.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |   /// ```
[INFO] [stdout]    |  _____^
[INFO] [stdout] 36 | | /// /*
[INFO] [stdout] 37 | | /// child process 0    child process 1    child process n
[INFO] [stdout] 38 | | /// _______________    _______________    _________
[INFO] [stdout] ...  |
[INFO] [stdout] 46 | | /// */
[INFO] [stdout] 47 | | /// ```
[INFO] [stdout]    | |_______^
[INFO] [stdout]    |
[INFO] [stdout] help: mark blocks that do not contain Rust code as text
[INFO] [stdout]    |
[INFO] [stdout] 35 | /// ```text
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.64s
[INFO] running `Command { std: "docker" "inspect" "a3882140843685d6129f2d7f62369cec7f0ae257b7b9c1018f5c4cba82af1942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3882140843685d6129f2d7f62369cec7f0ae257b7b9c1018f5c4cba82af1942", kill_on_drop: false }`
[INFO] [stdout] a3882140843685d6129f2d7f62369cec7f0ae257b7b9c1018f5c4cba82af1942
