[INFO] fetching crate aml 0.16.4...
[INFO] documenting aml-0.16.4 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate aml 0.16.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate aml 0.16.4 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 aml 0.16.4
[INFO] finished tweaking crates.io crate aml 0.16.4
[INFO] tweaked toml for crates.io crate aml 0.16.4 written to /workspace/builds/worker-4-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]  Downloading crates ...
[INFO] [stderr]   Downloaded spinning_top v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 165daf046a56402d07153b9f1662b33b07ca695fd237c442ce61dd7ef942fe4c
[INFO] running `Command { std: "docker" "start" "-a" "165daf046a56402d07153b9f1662b33b07ca695fd237c442ce61dd7ef942fe4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "165daf046a56402d07153b9f1662b33b07ca695fd237c442ce61dd7ef942fe4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "165daf046a56402d07153b9f1662b33b07ca695fd237c442ce61dd7ef942fe4c", kill_on_drop: false }`
[INFO] [stdout] 165daf046a56402d07153b9f1662b33b07ca695fd237c442ce61dd7ef942fe4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3b435a7da11f884c9965b82bc764f5b7c6c403c70a729741ca7fcf9612d39751
[INFO] running `Command { std: "docker" "start" "-a" "3b435a7da11f884c9965b82bc764f5b7c6c403c70a729741ca7fcf9612d39751", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking bit_field v0.10.2
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking spinning_top v0.2.5
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]  Documenting aml v0.16.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:38:1
[INFO] [stdout]    |
[INFO] [stdout] 38 | #![feature(decl_macro)]
[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 `aml`
[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 aml src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=aa70c6e5ff18003e -L dependency=/opt/rustwide/target/debug/deps --extern bit_field=/opt/rustwide/target/debug/deps/libbit_field-5f200b11ef6de4f9.rmeta --extern bitvec=/opt/rustwide/target/debug/deps/libbitvec-e8620c3ee7442184.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-cb0c92642940908d.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-91e42ebaf8a62e54.rmeta --extern spinning_top=/opt/rustwide/target/debug/deps/libspinning_top-52692a4298a0cf83.rmeta --cap-lints=warn --crate-version 0.16.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3b435a7da11f884c9965b82bc764f5b7c6c403c70a729741ca7fcf9612d39751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b435a7da11f884c9965b82bc764f5b7c6c403c70a729741ca7fcf9612d39751", kill_on_drop: false }`
[INFO] [stdout] 3b435a7da11f884c9965b82bc764f5b7c6c403c70a729741ca7fcf9612d39751
