[INFO] fetching crate aml 0.13.0...
[INFO] documenting aml-0.13.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate aml 0.13.0 into /workspace/builds/worker-94/source
[INFO] validating manifest of crates.io crate aml 0.13.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate aml 0.13.0
[INFO] finished tweaking crates.io crate aml 0.13.0
[INFO] tweaked toml for crates.io crate aml 0.13.0 written to /workspace/builds/worker-94/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1733c4841227fac37bb1199eaea8cc049595abf853b2dceac368b7e093e388cf
[INFO] running `Command { std: "docker" "start" "-a" "1733c4841227fac37bb1199eaea8cc049595abf853b2dceac368b7e093e388cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1733c4841227fac37bb1199eaea8cc049595abf853b2dceac368b7e093e388cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1733c4841227fac37bb1199eaea8cc049595abf853b2dceac368b7e093e388cf", kill_on_drop: false }`
[INFO] [stdout] 1733c4841227fac37bb1199eaea8cc049595abf853b2dceac368b7e093e388cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 203b68fc80c468a29d0261517636568b2612fae97fe03708349c324dacb1b11b
[INFO] running `Command { std: "docker" "start" "-a" "203b68fc80c468a29d0261517636568b2612fae97fe03708349c324dacb1b11b", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]  Documenting aml v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | #![feature(decl_macro, type_ascription, box_syntax, bool_to_option)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 `aml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name aml src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bit_field=/opt/rustwide/target/debug/deps/libbit_field-b86d457fa06b6ee7.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-29c502ba68da7d13.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-325d2e3c8b888de3.rmeta --cap-lints=warn --crate-version 0.13.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "203b68fc80c468a29d0261517636568b2612fae97fe03708349c324dacb1b11b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "203b68fc80c468a29d0261517636568b2612fae97fe03708349c324dacb1b11b", kill_on_drop: false }`
[INFO] [stdout] 203b68fc80c468a29d0261517636568b2612fae97fe03708349c324dacb1b11b
