[INFO] fetching crate assessment 1.0.0...
[INFO] testing assessment-1.0.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate assessment 1.0.0 into /workspace/builds/worker-17/source
[INFO] validating manifest of crates.io crate assessment 1.0.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate assessment 1.0.0
[INFO] finished tweaking crates.io crate assessment 1.0.0
[INFO] tweaked toml for crates.io crate assessment 1.0.0 written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f593b5e6d7dbf2204ae57d21ee12bd1acbf6aa30f55948c5ab309989f5b0ed2
[INFO] running `Command { std: "docker" "start" "-a" "0f593b5e6d7dbf2204ae57d21ee12bd1acbf6aa30f55948c5ab309989f5b0ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f593b5e6d7dbf2204ae57d21ee12bd1acbf6aa30f55948c5ab309989f5b0ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f593b5e6d7dbf2204ae57d21ee12bd1acbf6aa30f55948c5ab309989f5b0ed2", kill_on_drop: false }`
[INFO] [stdout] 0f593b5e6d7dbf2204ae57d21ee12bd1acbf6aa30f55948c5ab309989f5b0ed2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59fd95cc39e8a2a81d1a9edb3a632d02f006b33e43c1c9533ec0882d9a2e7246
[INFO] running `Command { std: "docker" "start" "-a" "59fd95cc39e8a2a81d1a9edb3a632d02f006b33e43c1c9533ec0882d9a2e7246", kill_on_drop: false }`
[INFO] [stderr]    Compiling impl_ops v0.1.1
[INFO] [stderr]    Compiling assessment v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(trait_alias)]
[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 `assessment` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "59fd95cc39e8a2a81d1a9edb3a632d02f006b33e43c1c9533ec0882d9a2e7246", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59fd95cc39e8a2a81d1a9edb3a632d02f006b33e43c1c9533ec0882d9a2e7246", kill_on_drop: false }`
[INFO] [stdout] 59fd95cc39e8a2a81d1a9edb3a632d02f006b33e43c1c9533ec0882d9a2e7246