[INFO] fetching crate unix_exec_piper 0.1.4...
[INFO] documenting unix_exec_piper-0.1.4 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate unix_exec_piper 0.1.4 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate unix_exec_piper 0.1.4 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-10/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-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65ac0f7b72b536c46596e80ddfba91efec12c74fb4b2995a202e29a92be3c899
[INFO] running `Command { std: "docker" "start" "-a" "65ac0f7b72b536c46596e80ddfba91efec12c74fb4b2995a202e29a92be3c899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65ac0f7b72b536c46596e80ddfba91efec12c74fb4b2995a202e29a92be3c899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65ac0f7b72b536c46596e80ddfba91efec12c74fb4b2995a202e29a92be3c899", kill_on_drop: false }`
[INFO] [stdout] 65ac0f7b72b536c46596e80ddfba91efec12c74fb4b2995a202e29a92be3c899
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 668acf7847095629a422284cf3d4cabcc0e383731609a636a1c1ce458be7abd5
[INFO] running `Command { std: "docker" "start" "-a" "668acf7847095629a422284cf3d4cabcc0e383731609a636a1c1ce458be7abd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[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]    = note: `#[warn(rustdoc::invalid_rust_codeblocks)]` on by default
[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: this URL is not a hyperlink
[INFO] [stdout]   --> src/pipe.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | /// https://man7.org/linux/man-pages/man2/fork.2.html
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://man7.org/linux/man-pages/man2/fork.2.html>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]   --> src/pipe.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | /// See https://man7.org/linux/man-pages/man2/pipe.2.html
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://man7.org/linux/man-pages/man2/pipe.2.html>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `Command { std: "docker" "inspect" "668acf7847095629a422284cf3d4cabcc0e383731609a636a1c1ce458be7abd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "668acf7847095629a422284cf3d4cabcc0e383731609a636a1c1ce458be7abd5", kill_on_drop: false }`
[INFO] [stdout] 668acf7847095629a422284cf3d4cabcc0e383731609a636a1c1ce458be7abd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "RUSTFLAGS=--cap-lints=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 98b61b2563c76d2a25805640fe5a50ef43c49cb9541826e7d9a1ff68f2851d86
[INFO] running `Command { std: "docker" "start" "-a" "98b61b2563c76d2a25805640fe5a50ef43c49cb9541826e7d9a1ff68f2851d86", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking errno v0.2.6
[INFO] [stderr]  Documenting unix_exec_piper v0.1.4 (/opt/rustwide/workdir)
[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]    = note: `#[warn(rustdoc::invalid_rust_codeblocks)]` on by default
[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: this URL is not a hyperlink
[INFO] [stdout]   --> src/pipe.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | /// https://man7.org/linux/man-pages/man2/fork.2.html
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://man7.org/linux/man-pages/man2/fork.2.html>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]   --> src/pipe.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | /// See https://man7.org/linux/man-pages/man2/pipe.2.html
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://man7.org/linux/man-pages/man2/pipe.2.html>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.38s
[INFO] running `Command { std: "docker" "inspect" "98b61b2563c76d2a25805640fe5a50ef43c49cb9541826e7d9a1ff68f2851d86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b61b2563c76d2a25805640fe5a50ef43c49cb9541826e7d9a1ff68f2851d86", kill_on_drop: false }`
[INFO] [stdout] 98b61b2563c76d2a25805640fe5a50ef43c49cb9541826e7d9a1ff68f2851d86