[INFO] fetching crate stylers_core 1.0.2...
[INFO] documenting stylers_core-1.0.2 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate stylers_core 1.0.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate stylers_core 1.0.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stylers_core 1.0.2
[INFO] finished tweaking crates.io crate stylers_core 1.0.2
[INFO] tweaked toml for crates.io crate stylers_core 1.0.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad85d433cf40e2dc91de80d79e4667a824a76b8942ab008b5ec1c2d09ae3b39c
[INFO] running `Command { std: "docker" "start" "-a" "ad85d433cf40e2dc91de80d79e4667a824a76b8942ab008b5ec1c2d09ae3b39c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad85d433cf40e2dc91de80d79e4667a824a76b8942ab008b5ec1c2d09ae3b39c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad85d433cf40e2dc91de80d79e4667a824a76b8942ab008b5ec1c2d09ae3b39c", kill_on_drop: false }`
[INFO] [stdout] ad85d433cf40e2dc91de80d79e4667a824a76b8942ab008b5ec1c2d09ae3b39c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdc76afa0f8de1a57447ccda2608d90f5589f1685672083f5091e4c4eb075251
[INFO] running `Command { std: "docker" "start" "-a" "fdc76afa0f8de1a57447ccda2608d90f5589f1685672083f5091e4c4eb075251", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking levenshtein v1.0.5
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]  Documenting stylers_core v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extend_one)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_span)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]  --> src/style/css_at_rule.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | /// ref: https://developer.mozilla.org/en-US/docs/Web/CSS/At-rule
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://developer.mozilla.org/en-US/docs/Web/CSS/At-rule>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]  --> src/style/css_style_declar.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | /// ref: https://www.w3schools.com/cssref/index.php
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://www.w3schools.com/cssref/index.php>`
[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/style/css_style_declar.rs:566:10
[INFO] [stdout]     |
[INFO] [stdout] 566 | /// ref: https://developer.mozilla.org/en-US/docs/Web/API/StyleDeclaration
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://developer.mozilla.org/en-US/docs/Web/API/StyleDeclaration>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `stylers_core`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name stylers_core src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5f429f968eeac01a -L dependency=/opt/rustwide/target/debug/deps --extern levenshtein=/opt/rustwide/target/debug/deps/liblevenshtein-9b3bce0acf247cbf.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-9c94b7c7214198ea.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-61995bb319fdf437.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-0c9fc02cdd47ca28.rmeta --extern rand_chacha=/opt/rustwide/target/debug/deps/librand_chacha-ac8919a7816108e2.rmeta --cap-lints=warn --crate-version 1.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fdc76afa0f8de1a57447ccda2608d90f5589f1685672083f5091e4c4eb075251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdc76afa0f8de1a57447ccda2608d90f5589f1685672083f5091e4c4eb075251", kill_on_drop: false }`
[INFO] [stdout] fdc76afa0f8de1a57447ccda2608d90f5589f1685672083f5091e4c4eb075251
