[INFO] fetching crate enso-prelude 0.1.7...
[INFO] checking enso-prelude-0.1.7 against beta for pr-78714
[INFO] extracting crate enso-prelude 0.1.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate enso-prelude 0.1.7 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate enso-prelude 0.1.7
[INFO] finished tweaking crates.io crate enso-prelude 0.1.7
[INFO] tweaked toml for crates.io crate enso-prelude 0.1.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "+beta" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04689e7a8f808b48f6bdd2c1ef8c479996bd8fda45fb0eaaffc5ab774d203037
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "04689e7a8f808b48f6bdd2c1ef8c479996bd8fda45fb0eaaffc5ab774d203037", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04689e7a8f808b48f6bdd2c1ef8c479996bd8fda45fb0eaaffc5ab774d203037", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04689e7a8f808b48f6bdd2c1ef8c479996bd8fda45fb0eaaffc5ab774d203037", kill_on_drop: false }`
[INFO] [stdout] 04689e7a8f808b48f6bdd2c1ef8c479996bd8fda45fb0eaaffc5ab774d203037
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 929f29d80255d11c4c267d4b4d0ee60edd014e5d1b9458966848963073562222
[INFO] running `Command { std: "docker" "start" "-a" "929f29d80255d11c4c267d4b4d0ee60edd014e5d1b9458966848963073562222", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.58
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.58
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling boolinator v2.4.0
[INFO] [stderr]     Checking weak-table v0.2.4
[INFO] [stderr]     Checking enclose v1.1.8
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.2.50
[INFO] [stderr]    Compiling enso-macro-utils v0.1.1
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling weedle v0.10.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/enso-macro-utils-0.1.1/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_distr v0.2.2
[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 `enso-macro-utils`
[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" "929f29d80255d11c4c267d4b4d0ee60edd014e5d1b9458966848963073562222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "929f29d80255d11c4c267d4b4d0ee60edd014e5d1b9458966848963073562222", kill_on_drop: false }`
[INFO] [stdout] 929f29d80255d11c4c267d4b4d0ee60edd014e5d1b9458966848963073562222