[INFO] cloning repository https://github.com/tiny-browserbook/exercise-rendering-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiny-browserbook/exercise-rendering-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52ba96b59bd81422a97a8caa975f4f04a7e8f63e
[INFO] documenting tiny-browserbook/exercise-rendering-tree against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tiny-browserbook/exercise-rendering-tree 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 git repo https://github.com/tiny-browserbook/exercise-rendering-tree
[INFO] finished tweaking git repo https://github.com/tiny-browserbook/exercise-rendering-tree
[INFO] tweaked toml for git repo https://github.com/tiny-browserbook/exercise-rendering-tree written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/tiny-browserbook/exercise-rendering-tree 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 73b31cce21bba9dbca8750c7ffe6ba53caf9ace9cb58caa699bc1e79bb0fb868
[INFO] running `Command { std: "docker" "start" "-a" "73b31cce21bba9dbca8750c7ffe6ba53caf9ace9cb58caa699bc1e79bb0fb868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73b31cce21bba9dbca8750c7ffe6ba53caf9ace9cb58caa699bc1e79bb0fb868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73b31cce21bba9dbca8750c7ffe6ba53caf9ace9cb58caa699bc1e79bb0fb868", kill_on_drop: false }`
[INFO] [stdout] 73b31cce21bba9dbca8750c7ffe6ba53caf9ace9cb58caa699bc1e79bb0fb868
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] d5897dbed9f35e7ccbaae57a3845fa288eda115e4913f41ce8c39b1ca49c8185
[INFO] running `Command { std: "docker" "start" "-a" "d5897dbed9f35e7ccbaae57a3845fa288eda115e4913f41ce8c39b1ca49c8185", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking combine v4.5.2
[INFO] [stderr]  Documenting exercise-rendering-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]   --> src/css.rs:12:82
[INFO] [stdout]    |
[INFO] [stdout] 12 | /// It consists of multiple rules, which are called "rule-list" in the standard (https://www.w3.org/TR/css-syntax-3/).
[INFO] [stdout]    |                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/TR/css-syntax-3/>`
[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/css.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | /// https://www.w3.org/TR/selectors-3/#selector-syntax
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/TR/selectors-3/#selector-syntax>`
[INFO] [stdout]    |
[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/css.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 | /// See https://www.w3.org/TR/selectors-3/#attribute-selectors to check the full list of available operators.
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/TR/selectors-3/#attribute-selectors>`
[INFO] [stdout]    |
[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/css.rs:82:80
[INFO] [stdout]    |
[INFO] [stdout] 82 | /// - descriptors, which are mostly used in "at-rules" like `@foo (bar: piyo)` https://www.w3.org/Style/CSS/all-descriptors.en.html
[INFO] [stdout]    |                                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/Style/CSS/all-descriptors.en.html>`
[INFO] [stdout]    |
[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/css.rs:83:86
[INFO] [stdout]    |
[INFO] [stdout] 83 | /// - properties, which are mostly used in "qualified rules" like `.foo {bar: piyo}` https://www.w3.org/Style/CSS/all-descriptors.en.html
[INFO] [stdout]    |                                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/Style/CSS/all-descriptors.en.html>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.46s
[INFO] running `Command { std: "docker" "inspect" "d5897dbed9f35e7ccbaae57a3845fa288eda115e4913f41ce8c39b1ca49c8185", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5897dbed9f35e7ccbaae57a3845fa288eda115e4913f41ce8c39b1ca49c8185", kill_on_drop: false }`
[INFO] [stdout] d5897dbed9f35e7ccbaae57a3845fa288eda115e4913f41ce8c39b1ca49c8185
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] f0f43e9891e00340309031bb8dcfcaa93a4868040bcad99609568633dfc48ecb
[INFO] running `Command { std: "docker" "start" "-a" "f0f43e9891e00340309031bb8dcfcaa93a4868040bcad99609568633dfc48ecb", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking combine v4.5.2
[INFO] [stderr]  Documenting exercise-rendering-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]   --> src/css.rs:12:82
[INFO] [stdout]    |
[INFO] [stdout] 12 | /// It consists of multiple rules, which are called "rule-list" in the standard (https://www.w3.org/TR/css-syntax-3/).
[INFO] [stdout]    |                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/TR/css-syntax-3/>`
[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/css.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | /// https://www.w3.org/TR/selectors-3/#selector-syntax
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/TR/selectors-3/#selector-syntax>`
[INFO] [stdout]    |
[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/css.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 | /// See https://www.w3.org/TR/selectors-3/#attribute-selectors to check the full list of available operators.
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/TR/selectors-3/#attribute-selectors>`
[INFO] [stdout]    |
[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/css.rs:82:80
[INFO] [stdout]    |
[INFO] [stdout] 82 | /// - descriptors, which are mostly used in "at-rules" like `@foo (bar: piyo)` https://www.w3.org/Style/CSS/all-descriptors.en.html
[INFO] [stdout]    |                                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/Style/CSS/all-descriptors.en.html>`
[INFO] [stdout]    |
[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/css.rs:83:86
[INFO] [stdout]    |
[INFO] [stdout] 83 | /// - properties, which are mostly used in "qualified rules" like `.foo {bar: piyo}` https://www.w3.org/Style/CSS/all-descriptors.en.html
[INFO] [stdout]    |                                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3.org/Style/CSS/all-descriptors.en.html>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.06s
[INFO] running `Command { std: "docker" "inspect" "f0f43e9891e00340309031bb8dcfcaa93a4868040bcad99609568633dfc48ecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0f43e9891e00340309031bb8dcfcaa93a4868040bcad99609568633dfc48ecb", kill_on_drop: false }`
[INFO] [stdout] f0f43e9891e00340309031bb8dcfcaa93a4868040bcad99609568633dfc48ecb