[INFO] fetching crate bootloader 0.10.12...
[INFO] testing bootloader-0.10.12 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate bootloader 0.10.12 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate bootloader 0.10.12 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] removed /workspace/builds/worker-2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-2/source/rust-toolchain
[INFO] started tweaking crates.io crate bootloader 0.10.12
[INFO] finished tweaking crates.io crate bootloader 0.10.12
[INFO] tweaked toml for crates.io crate bootloader 0.10.12 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate bootloader 0.10.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ucs2 v0.3.2
[INFO] [stderr]   Downloaded llvm-tools v0.1.1
[INFO] [stderr]   Downloaded gpt v2.0.0
[INFO] [stderr]   Downloaded conquer-once v0.2.1
[INFO] [stderr]   Downloaded conquer-util v0.2.0
[INFO] [stderr]   Downloaded rsdp v1.1.0
[INFO] [stderr]   Downloaded uefi v0.11.0
[INFO] [stderr]   Downloaded uefi-macros v0.3.3
[INFO] [stderr]   Downloaded x86_64 v0.14.7
[INFO] [stderr]   Downloaded volatile v0.4.4
[INFO] [stderr]   Downloaded raw-cpuid v10.2.0
[INFO] [stderr]   Downloaded fatfs v0.3.5
[INFO] [stderr]   Downloaded noto-sans-mono-bitmap v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 248355f3c7193da23edff6b6c378134df5e4f8f638e497c3eea04f731d73a05c
[INFO] running `Command { std: "docker" "start" "-a" "248355f3c7193da23edff6b6c378134df5e4f8f638e497c3eea04f731d73a05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "248355f3c7193da23edff6b6c378134df5e4f8f638e497c3eea04f731d73a05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "248355f3c7193da23edff6b6c378134df5e4f8f638e497c3eea04f731d73a05c", kill_on_drop: false }`
[INFO] [stdout] 248355f3c7193da23edff6b6c378134df5e4f8f638e497c3eea04f731d73a05c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] c233dfe1ac1c53eb33408ead246f2b6d11aac3e771f0cf21492501ba57943797
[INFO] running `Command { std: "docker" "start" "-a" "c233dfe1ac1c53eb33408ead246f2b6d11aac3e771f0cf21492501ba57943797", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.10.12 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 | #![feature(maybe_uninit_slice)]
[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 `bootloader` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c233dfe1ac1c53eb33408ead246f2b6d11aac3e771f0cf21492501ba57943797", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c233dfe1ac1c53eb33408ead246f2b6d11aac3e771f0cf21492501ba57943797", kill_on_drop: false }`
[INFO] [stdout] c233dfe1ac1c53eb33408ead246f2b6d11aac3e771f0cf21492501ba57943797