[INFO] fetching crate engine 0.0.0...
[INFO] documenting engine-0.0.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate engine 0.0.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate engine 0.0.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate engine 0.0.0
[INFO] finished tweaking crates.io crate engine 0.0.0
[INFO] tweaked toml for crates.io crate engine 0.0.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "fetch" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6bf58ea40f3ae5910680efa6bf9688b22cc89bf11fcf40bb9fc64e741800a5a6
[INFO] running `Command { std: "docker" "start" "-a" "6bf58ea40f3ae5910680efa6bf9688b22cc89bf11fcf40bb9fc64e741800a5a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bf58ea40f3ae5910680efa6bf9688b22cc89bf11fcf40bb9fc64e741800a5a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bf58ea40f3ae5910680efa6bf9688b22cc89bf11fcf40bb9fc64e741800a5a6", kill_on_drop: false }`
[INFO] [stdout] 6bf58ea40f3ae5910680efa6bf9688b22cc89bf11fcf40bb9fc64e741800a5a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f8abbb21d613fa062a443af6675de7b4fde2663378b3098c9775f181543f96d
[INFO] running `Command { std: "docker" "start" "-a" "1f8abbb21d613fa062a443af6675de7b4fde2663378b3098c9775f181543f96d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking backtrace v0.3.61
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]  Documenting engine v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: Rust code block is empty
[INFO] [stdout]  --> src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |   //! ```rust
[INFO] [stdout]   |  _____^
[INFO] [stdout] 9 | | //! ```
[INFO] [stdout]   | |_______^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(rustdoc::invalid_rust_codeblocks)]` 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 12.07s
[INFO] running `Command { std: "docker" "inspect" "1f8abbb21d613fa062a443af6675de7b4fde2663378b3098c9775f181543f96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8abbb21d613fa062a443af6675de7b4fde2663378b3098c9775f181543f96d", kill_on_drop: false }`
[INFO] [stdout] 1f8abbb21d613fa062a443af6675de7b4fde2663378b3098c9775f181543f96d
