[INFO] fetching crate starlark_derive 0.7.0...
[INFO] documenting starlark_derive-0.7.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate starlark_derive 0.7.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate starlark_derive 0.7.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate starlark_derive 0.7.0
[INFO] finished tweaking crates.io crate starlark_derive 0.7.0
[INFO] tweaked toml for crates.io crate starlark_derive 0.7.0 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gazebo v0.6.0
[INFO] [stderr]   Downloaded gazebo_lint v0.1.1
[INFO] [stderr]   Downloaded gazebo_derive v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90f1fc93c9e1641166c3af3d954d77c28f9465e65980918c2799a3d18dcc33d0
[INFO] running `Command { std: "docker" "start" "-a" "90f1fc93c9e1641166c3af3d954d77c28f9465e65980918c2799a3d18dcc33d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90f1fc93c9e1641166c3af3d954d77c28f9465e65980918c2799a3d18dcc33d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90f1fc93c9e1641166c3af3d954d77c28f9465e65980918c2799a3d18dcc33d0", kill_on_drop: false }`
[INFO] [stdout] 90f1fc93c9e1641166c3af3d954d77c28f9465e65980918c2799a3d18dcc33d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5de705aec5eb2c643d710fb0a9e47395576ca5cbb905011f7a74b8bdb0fae279
[INFO] running `Command { std: "docker" "start" "-a" "5de705aec5eb2c643d710fb0a9e47395576ca5cbb905011f7a74b8bdb0fae279", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]    Compiling gazebo_derive v0.6.0
[INFO] [stderr]     Checking gazebo v0.6.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gazebo-0.6.0/src/lib.rs:10:49
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![cfg_attr(feature = "str_pattern_extensions", feature(pattern))]
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gazebo-0.6.0/src/lib.rs:11:49
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![cfg_attr(feature = "str_pattern_extensions", feature(associated_type_bounds))]
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gazebo-0.6.0/src/lib.rs:10:57
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![cfg_attr(feature = "str_pattern_extensions", feature(pattern))]
[INFO] [stdout]    |                                                         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 compile `gazebo` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "5de705aec5eb2c643d710fb0a9e47395576ca5cbb905011f7a74b8bdb0fae279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5de705aec5eb2c643d710fb0a9e47395576ca5cbb905011f7a74b8bdb0fae279", kill_on_drop: false }`
[INFO] [stdout] 5de705aec5eb2c643d710fb0a9e47395576ca5cbb905011f7a74b8bdb0fae279