[INFO] fetching crate starlark 0.4.0...
[INFO] testing starlark-0.4.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate starlark 0.4.0 into /workspace/builds/worker-97/source
[INFO] validating manifest of crates.io crate starlark 0.4.0 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 starlark 0.4.0
[INFO] finished tweaking crates.io crate starlark 0.4.0
[INFO] tweaked toml for crates.io crate starlark 0.4.0 written to /workspace/builds/worker-97/source/Cargo.toml
[INFO] crate crates.io crate starlark 0.4.0 already has a lockfile, it will not be regenerated
[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-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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] acc259ebf26a4935a713e77717f6e488f13559a4088be66f9386ef1866b7061b
[INFO] running `Command { std: "docker" "start" "-a" "acc259ebf26a4935a713e77717f6e488f13559a4088be66f9386ef1866b7061b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acc259ebf26a4935a713e77717f6e488f13559a4088be66f9386ef1866b7061b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acc259ebf26a4935a713e77717f6e488f13559a4088be66f9386ef1866b7061b", kill_on_drop: false }`
[INFO] [stdout] acc259ebf26a4935a713e77717f6e488f13559a4088be66f9386ef1866b7061b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6524842d0579e4c41e4f1dfc3329be7697fc5879a20989d0fe82ff12862ba9a
[INFO] running `Command { std: "docker" "start" "-a" "c6524842d0579e4c41e4f1dfc3329be7697fc5879a20989d0fe82ff12862ba9a", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling pico-args v0.4.0
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling yansi-term v0.1.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling bumpalo v3.6.1
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tinyvec v1.2.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling annotate-snippets v0.9.0
[INFO] [stderr]    Compiling string_cache v0.8.1
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.17
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling idna v0.2.2
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling lalrpop-util v0.19.5
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling lalrpop v0.19.5
[INFO] [stderr]    Compiling rustyline v7.1.0
[INFO] [stderr]    Compiling serde_repr v0.1.6
[INFO] [stderr]    Compiling gazebo_derive v0.1.1
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling derive_more v0.99.13
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling gazebo v0.2.0
[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-0.2.0/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-0.2.0/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: 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 compile `gazebo`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c6524842d0579e4c41e4f1dfc3329be7697fc5879a20989d0fe82ff12862ba9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6524842d0579e4c41e4f1dfc3329be7697fc5879a20989d0fe82ff12862ba9a", kill_on_drop: false }`
[INFO] [stdout] c6524842d0579e4c41e4f1dfc3329be7697fc5879a20989d0fe82ff12862ba9a
