[INFO] fetching crate aml 0.16.1...
[INFO] testing aml-0.16.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate aml 0.16.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate aml 0.16.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate aml 0.16.1
[INFO] finished tweaking crates.io crate aml 0.16.1
[INFO] tweaked toml for crates.io crate aml 0.16.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08c8c9ead5f9d1c409e1daf8078c3b13267ff2f84c7b423796fc5e9023121278
[INFO] running `Command { std: "docker" "start" "-a" "08c8c9ead5f9d1c409e1daf8078c3b13267ff2f84c7b423796fc5e9023121278", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08c8c9ead5f9d1c409e1daf8078c3b13267ff2f84c7b423796fc5e9023121278", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08c8c9ead5f9d1c409e1daf8078c3b13267ff2f84c7b423796fc5e9023121278", kill_on_drop: false }`
[INFO] [stdout] 08c8c9ead5f9d1c409e1daf8078c3b13267ff2f84c7b423796fc5e9023121278
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a47b39dad1581c31ee4dba664f78a2ee98673c6e03f20304f3d05ec37038c6bf
[INFO] running `Command { std: "docker" "start" "-a" "a47b39dad1581c31ee4dba664f78a2ee98673c6e03f20304f3d05ec37038c6bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling funty v1.2.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling wyz v0.4.0
[INFO] [stderr]    Compiling spinning_top v0.2.4
[INFO] [stderr]    Compiling bitvec v0.22.3
[INFO] [stderr]    Compiling aml v0.16.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #![feature(decl_macro, type_ascription, box_syntax, bool_to_option)]
[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 compile `aml` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a47b39dad1581c31ee4dba664f78a2ee98673c6e03f20304f3d05ec37038c6bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a47b39dad1581c31ee4dba664f78a2ee98673c6e03f20304f3d05ec37038c6bf", kill_on_drop: false }`
[INFO] [stdout] a47b39dad1581c31ee4dba664f78a2ee98673c6e03f20304f3d05ec37038c6bf