[INFO] fetching crate xtensa-lx 0.8.0...
[INFO] documenting xtensa-lx-0.8.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate xtensa-lx 0.8.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate xtensa-lx 0.8.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xtensa-lx 0.8.0
[INFO] finished tweaking crates.io crate xtensa-lx 0.8.0
[INFO] tweaked toml for crates.io crate xtensa-lx 0.8.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mutex-trait v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 270de685ac0606b408d9a027aaa22c437c330ecb2c4b92e40c615fc42c90c329
[INFO] running `Command { std: "docker" "start" "-a" "270de685ac0606b408d9a027aaa22c437c330ecb2c4b92e40c615fc42c90c329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "270de685ac0606b408d9a027aaa22c437c330ecb2c4b92e40c615fc42c90c329", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "270de685ac0606b408d9a027aaa22c437c330ecb2c4b92e40c615fc42c90c329", kill_on_drop: false }`
[INFO] [stdout] 270de685ac0606b408d9a027aaa22c437c330ecb2c4b92e40c615fc42c90c329
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f065d284bdbdb7b5bc42f49726af7d93d51b5412ac023c85f44b2c2467b1eea
[INFO] running `Command { std: "docker" "start" "-a" "7f065d284bdbdb7b5bc42f49726af7d93d51b5412ac023c85f44b2c2467b1eea", kill_on_drop: false }`
[INFO] [stderr]    Compiling xtensa-lx v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking mutex-trait v0.2.0
[INFO] [stderr]  Documenting xtensa-lx v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(asm_experimental_arch)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `spin`
[INFO] [stdout]   --> src/mutex.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 |     data: spin::Mutex<T>,
[INFO] [stdout]    |           ^^^^ use of undeclared crate or module `spin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `spin`
[INFO] [stdout]   --> src/mutex.rs:77:11
[INFO] [stdout]    |
[INFO] [stdout] 77 |     data: spin::Mutex<T>,
[INFO] [stdout]    |           ^^^^ use of undeclared crate or module `spin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `xtensa-lx`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type lib --crate-name xtensa_lx src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=533dcfced686e210 -L dependency=/opt/rustwide/target/debug/deps --extern bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-c99b0d5170082952.rmeta --extern mutex_trait=/opt/rustwide/target/debug/deps/libmutex_trait-0b270e157f95010c.rmeta --cap-lints=warn --crate-version 0.8.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7f065d284bdbdb7b5bc42f49726af7d93d51b5412ac023c85f44b2c2467b1eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f065d284bdbdb7b5bc42f49726af7d93d51b5412ac023c85f44b2c2467b1eea", kill_on_drop: false }`
[INFO] [stdout] 7f065d284bdbdb7b5bc42f49726af7d93d51b5412ac023c85f44b2c2467b1eea
