[INFO] fetching crate cortex-a 8.1.1...
[INFO] documenting cortex-a-8.1.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate cortex-a 8.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate cortex-a 8.1.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate cortex-a 8.1.1
[INFO] finished tweaking crates.io crate cortex-a 8.1.1
[INFO] tweaked toml for crates.io crate cortex-a 8.1.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tock-registers v0.8.1
[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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0fc2d61256ed1d7013566c5b333410f28e0cb3ae4ca7963b1ea4cd774f1ac2e
[INFO] running `Command { std: "docker" "start" "-a" "c0fc2d61256ed1d7013566c5b333410f28e0cb3ae4ca7963b1ea4cd774f1ac2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0fc2d61256ed1d7013566c5b333410f28e0cb3ae4ca7963b1ea4cd774f1ac2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0fc2d61256ed1d7013566c5b333410f28e0cb3ae4ca7963b1ea4cd774f1ac2e", kill_on_drop: false }`
[INFO] [stdout] c0fc2d61256ed1d7013566c5b333410f28e0cb3ae4ca7963b1ea4cd774f1ac2e
[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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7c9cf603571cd8b6d074e8383eae7c64f904919cd95c473625c661bf3d62b5a
[INFO] running `Command { std: "docker" "start" "-a" "c7c9cf603571cd8b6d074e8383eae7c64f904919cd95c473625c661bf3d62b5a", kill_on_drop: false }`
[INFO] [stderr]     Checking tock-registers v0.8.1
[INFO] [stderr]  Documenting cortex-a v8.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:88:34
[INFO] [stdout]    |
[INFO] [stdout] 88 | #![cfg_attr(feature = "nightly", feature(core_intrinsics))]
[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:89:34
[INFO] [stdout]    |
[INFO] [stdout] 89 | #![cfg_attr(feature = "nightly", feature(custom_inner_attributes))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `cortex-a`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name cortex_a src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="nightly"' --cfg 'feature="tock-registers"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2244676be710e992 -L dependency=/opt/rustwide/target/debug/deps --extern tock_registers=/opt/rustwide/target/debug/deps/libtock_registers-9ea7ba4c8fae292f.rmeta --cap-lints=warn --crate-version 8.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c7c9cf603571cd8b6d074e8383eae7c64f904919cd95c473625c661bf3d62b5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7c9cf603571cd8b6d074e8383eae7c64f904919cd95c473625c661bf3d62b5a", kill_on_drop: false }`
[INFO] [stdout] c7c9cf603571cd8b6d074e8383eae7c64f904919cd95c473625c661bf3d62b5a
