[INFO] fetching crate xtree 0.1.8...
[INFO] documenting xtree-0.1.8 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate xtree 0.1.8 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate xtree 0.1.8 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xtree 0.1.8
[INFO] finished tweaking crates.io crate xtree 0.1.8
[INFO] tweaked toml for crates.io crate xtree 0.1.8 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate xtree 0.1.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 163a1f4c85aa82dde3efaaf8886a91f2bf69b9627464cbaa10564186005b2387
[INFO] running `Command { std: "docker" "start" "-a" "163a1f4c85aa82dde3efaaf8886a91f2bf69b9627464cbaa10564186005b2387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "163a1f4c85aa82dde3efaaf8886a91f2bf69b9627464cbaa10564186005b2387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "163a1f4c85aa82dde3efaaf8886a91f2bf69b9627464cbaa10564186005b2387", kill_on_drop: false }`
[INFO] [stdout] 163a1f4c85aa82dde3efaaf8886a91f2bf69b9627464cbaa10564186005b2387
[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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dd80ec0c27048a9da88a83465778cc290fcbbcf8f2ce8ff1d60cc38dc0dd1f2
[INFO] running `Command { std: "docker" "start" "-a" "3dd80ec0c27048a9da88a83465778cc290fcbbcf8f2ce8ff1d60cc38dc0dd1f2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting xtree v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: Rust code block is empty
[INFO] [stdout]   --> src/lib.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |   //! ```
[INFO] [stdout]    |  _____^
[INFO] [stdout] 22 | | //! //      1
[INFO] [stdout] 23 | | //! //     / \
[INFO] [stdout] 24 | | //! //   2    5
[INFO] [stdout] 25 | | //! //  / \
[INFO] [stdout] 26 | | //! // 3   4
[INFO] [stdout] 27 | | //! ```
[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] 21 | //! ```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 1.15s
[INFO] running `Command { std: "docker" "inspect" "3dd80ec0c27048a9da88a83465778cc290fcbbcf8f2ce8ff1d60cc38dc0dd1f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dd80ec0c27048a9da88a83465778cc290fcbbcf8f2ce8ff1d60cc38dc0dd1f2", kill_on_drop: false }`
[INFO] [stdout] 3dd80ec0c27048a9da88a83465778cc290fcbbcf8f2ce8ff1d60cc38dc0dd1f2
[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" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=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" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 9939b8f50edd3cf1e3be0e8ed79ad22afa8eefc9f636af928ac990cd5450062a
[INFO] running `Command { std: "docker" "start" "-a" "9939b8f50edd3cf1e3be0e8ed79ad22afa8eefc9f636af928ac990cd5450062a", kill_on_drop: false }`
[INFO] [stderr]  Documenting xtree v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: Rust code block is empty
[INFO] [stdout]   --> src/lib.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |   //! ```
[INFO] [stdout]    |  _____^
[INFO] [stdout] 22 | | //! //      1
[INFO] [stdout] 23 | | //! //     / \
[INFO] [stdout] 24 | | //! //   2    5
[INFO] [stdout] 25 | | //! //  / \
[INFO] [stdout] 26 | | //! // 3   4
[INFO] [stdout] 27 | | //! ```
[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] 21 | //! ```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 0.79s
[INFO] running `Command { std: "docker" "inspect" "9939b8f50edd3cf1e3be0e8ed79ad22afa8eefc9f636af928ac990cd5450062a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9939b8f50edd3cf1e3be0e8ed79ad22afa8eefc9f636af928ac990cd5450062a", kill_on_drop: false }`
[INFO] [stdout] 9939b8f50edd3cf1e3be0e8ed79ad22afa8eefc9f636af928ac990cd5450062a