[INFO] fetching crate librs 0.1.0...
[INFO] testing librs-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate librs 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate librs 0.1.0 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 librs 0.1.0
[INFO] finished tweaking crates.io crate librs 0.1.0
[INFO] tweaked toml for crates.io crate librs 0.1.0 written to /workspace/builds/worker-0/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const_type v0.1.3
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7814d14260f4daa663767c73eb626c86ddf4f2e95e05d28cf68d0692b2a3294b
[INFO] running `Command { std: "docker" "start" "-a" "7814d14260f4daa663767c73eb626c86ddf4f2e95e05d28cf68d0692b2a3294b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7814d14260f4daa663767c73eb626c86ddf4f2e95e05d28cf68d0692b2a3294b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7814d14260f4daa663767c73eb626c86ddf4f2e95e05d28cf68d0692b2a3294b", kill_on_drop: false }`
[INFO] [stdout] 7814d14260f4daa663767c73eb626c86ddf4f2e95e05d28cf68d0692b2a3294b
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 832eda8a84bd77233cb06a85c294536042fa969dce1c3d34be508c5d6ba5251a
[INFO] running `Command { std: "docker" "start" "-a" "832eda8a84bd77233cb06a85c294536042fa969dce1c3d34be508c5d6ba5251a", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_type v0.1.3
[INFO] [stderr]    Compiling librs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> source/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(asm)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> source/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(never_type)]
[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 `librs` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "832eda8a84bd77233cb06a85c294536042fa969dce1c3d34be508c5d6ba5251a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "832eda8a84bd77233cb06a85c294536042fa969dce1c3d34be508c5d6ba5251a", kill_on_drop: false }`
[INFO] [stdout] 832eda8a84bd77233cb06a85c294536042fa969dce1c3d34be508c5d6ba5251a