[INFO] fetching crate continuation 0.1.1...
[INFO] testing continuation-0.1.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate continuation 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate continuation 0.1.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate continuation 0.1.1
[INFO] finished tweaking crates.io crate continuation 0.1.1
[INFO] tweaked toml for crates.io crate continuation 0.1.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e974ffd1a337d5d5a4ccced9a27566da85157e2055c47f32088b1f233ec1492f
[INFO] running `Command { std: "docker" "start" "-a" "e974ffd1a337d5d5a4ccced9a27566da85157e2055c47f32088b1f233ec1492f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e974ffd1a337d5d5a4ccced9a27566da85157e2055c47f32088b1f233ec1492f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e974ffd1a337d5d5a4ccced9a27566da85157e2055c47f32088b1f233ec1492f", kill_on_drop: false }`
[INFO] [stdout] e974ffd1a337d5d5a4ccced9a27566da85157e2055c47f32088b1f233ec1492f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de5bd08c45f4101f6e02a41fb9fa1f7bae535039ccc3432828345dc3b4f2a17a
[INFO] running `Command { std: "docker" "start" "-a" "de5bd08c45f4101f6e02a41fb9fa1f7bae535039ccc3432828345dc3b4f2a17a", kill_on_drop: false }`
[INFO] [stderr]    Compiling continuation v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(never_type)]
[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 `continuation` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "de5bd08c45f4101f6e02a41fb9fa1f7bae535039ccc3432828345dc3b4f2a17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de5bd08c45f4101f6e02a41fb9fa1f7bae535039ccc3432828345dc3b4f2a17a", kill_on_drop: false }`
[INFO] [stdout] de5bd08c45f4101f6e02a41fb9fa1f7bae535039ccc3432828345dc3b4f2a17a