[INFO] fetching crate pn532 0.3.1...
[INFO] documenting pn532-0.3.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate pn532 0.3.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate pn532 0.3.1 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] started tweaking crates.io crate pn532 0.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate pn532 0.3.1
[INFO] tweaked toml for crates.io crate pn532 0.3.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate pn532 0.3.1 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libudev v0.3.0
[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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5906cbed0749a9f3cc821d9809aa5c7815efc5dde69683c9227fcadb123a4085
[INFO] running `Command { std: "docker" "start" "-a" "5906cbed0749a9f3cc821d9809aa5c7815efc5dde69683c9227fcadb123a4085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5906cbed0749a9f3cc821d9809aa5c7815efc5dde69683c9227fcadb123a4085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5906cbed0749a9f3cc821d9809aa5c7815efc5dde69683c9227fcadb123a4085", kill_on_drop: false }`
[INFO] [stdout] 5906cbed0749a9f3cc821d9809aa5c7815efc5dde69683c9227fcadb123a4085
[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] dd7cc5a2cca985c9af4fe80cc18fb0b5e4fe70864be3166c63692241b84741d7
[INFO] running `Command { std: "docker" "start" "-a" "dd7cc5a2cca985c9af4fe80cc18fb0b5e4fe70864be3166c63692241b84741d7", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]  Documenting pn532 v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:54:18
[INFO] [stdout]    |
[INFO] [stdout] 54 | #![cfg_attr(doc, feature(doc_cfg))]
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `pn532`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name pn532 src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2341b687b3ccf907 -L dependency=/opt/rustwide/target/debug/deps --extern embedded_hal=/opt/rustwide/target/debug/deps/libembedded_hal-7c4259a1e36ee4d5.rmeta --extern nb=/opt/rustwide/target/debug/deps/libnb-7177e5a5645b1054.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-a1dcd028eea2d9af.rmeta --cap-lints=warn --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "dd7cc5a2cca985c9af4fe80cc18fb0b5e4fe70864be3166c63692241b84741d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd7cc5a2cca985c9af4fe80cc18fb0b5e4fe70864be3166c63692241b84741d7", kill_on_drop: false }`
[INFO] [stdout] dd7cc5a2cca985c9af4fe80cc18fb0b5e4fe70864be3166c63692241b84741d7
