[INFO] fetching crate unik 0.2.0...
[INFO] testing unik-0.2.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate unik 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate unik 0.2.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unik 0.2.0
[INFO] finished tweaking crates.io crate unik 0.2.0
[INFO] tweaked toml for crates.io crate unik 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mac_address v1.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cf59a8932621ef80bad143f3a5467521313d734d7e99f6311178b3bf9ceb13d
[INFO] running `Command { std: "docker" "start" "-a" "3cf59a8932621ef80bad143f3a5467521313d734d7e99f6311178b3bf9ceb13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cf59a8932621ef80bad143f3a5467521313d734d7e99f6311178b3bf9ceb13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cf59a8932621ef80bad143f3a5467521313d734d7e99f6311178b3bf9ceb13d", kill_on_drop: false }`
[INFO] [stdout] 3cf59a8932621ef80bad143f3a5467521313d734d7e99f6311178b3bf9ceb13d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe2e64e6f361122d18fed0b1bb1524e6d3eca4c5acf6a3b9fa560365585f6f93
[INFO] running `Command { std: "docker" "start" "-a" "fe2e64e6f361122d18fed0b1bb1524e6d3eca4c5acf6a3b9fa560365585f6f93", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling sha1_smol v1.0.0
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling nanorand v0.6.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling sha1 v0.6.1
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling mac_address v1.1.3
[INFO] [stderr]    Compiling unik v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(doc_cfg)]
[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 `unik` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fe2e64e6f361122d18fed0b1bb1524e6d3eca4c5acf6a3b9fa560365585f6f93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe2e64e6f361122d18fed0b1bb1524e6d3eca4c5acf6a3b9fa560365585f6f93", kill_on_drop: false }`
[INFO] [stdout] fe2e64e6f361122d18fed0b1bb1524e6d3eca4c5acf6a3b9fa560365585f6f93