[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 1.98.0-beta.1 for beta-rustdoc-1.98-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tiny-browserbook/exercise-rendering-tree on toolchain 1.98.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.1" "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
[ERROR] error running command: no output for 300 seconds
[INFO] documenting tiny-browserbook/exercise-rendering-tree against 1.98.0-beta.1 for beta-rustdoc-1.98-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-rendering-tree" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tiny-browserbook/exercise-rendering-tree on toolchain 1.98.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.1" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded combine v4.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1
[INFO] running `Command { std: "docker" "start" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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]    |                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout]    = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout] help: use an automatic link instead
[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]    |                                                                                  +                                   +
[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]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[INFO] [stdout]    |
[INFO] [stdout] 45 | /// <https://www.w3.org/TR/selectors-3/#selector-syntax>
[INFO] [stdout]    |     +                                                  +
[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]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[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]    |         +                                                      +
[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]    |                                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[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]    |                                                                                +                                                    +
[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 | ...lified rules" like `.foo {bar: piyo}` https://www.w3.org/Style/CSS/all-descriptors.en.html
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[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]    |                                                                                      +                                                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.10s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/exercise_rendering_tree/index.html
[INFO] running `Command { std: "docker" "inspect" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-w" "/opt/rustwide/workdir" "--user" "0:0" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.1" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[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]    |                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout]    = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout] help: use an automatic link instead
[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]    |                                                                                  +                                   +
[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]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[INFO] [stdout]    |
[INFO] [stdout] 45 | /// <https://www.w3.org/TR/selectors-3/#selector-syntax>
[INFO] [stdout]    |     +                                                  +
[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]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[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]    |         +                                                      +
[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]    |                                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[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]    |                                                                                +                                                    +
[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 | ...lified rules" like `.foo {bar: piyo}` https://www.w3.org/Style/CSS/all-descriptors.en.html
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] help: use an automatic link instead
[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]    |                                                                                      +                                                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/exercise_rendering_tree/index.html
[INFO] running `Command { std: "docker" "inspect" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1", kill_on_drop: false }`
[INFO] [stdout] 0e4ef0c805cccf78f6f0832faf1ace80634bc885a56e3cd1d7ebbd7314358ac1
