[INFO] fetching crate bootloader 0.10.8...
[INFO] testing bootloader-0.10.8 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate bootloader 0.10.8 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate bootloader 0.10.8 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] removed /workspace/builds/worker-48/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-48/source/rust-toolchain
[INFO] started tweaking crates.io crate bootloader 0.10.8
[INFO] finished tweaking crates.io crate bootloader 0.10.8
[INFO] tweaked toml for crates.io crate bootloader 0.10.8 written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] crate crates.io crate bootloader 0.10.8 already has a lockfile, it will not be regenerated
[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 font8x8 v0.2.7
[INFO] [stderr]   Downloaded gpt v2.0.0
[INFO] [stderr]   Downloaded conquer-util v0.2.0
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded uefi-macros v0.3.3
[INFO] [stderr]   Downloaded ucs2 v0.3.2
[INFO] [stderr]   Downloaded uefi v0.11.0
[INFO] [stderr]   Downloaded x86_64 v0.13.6
[INFO] [stderr]   Downloaded conquer-once v0.2.1
[INFO] [stderr]   Downloaded fatfs v0.3.5
[INFO] [stderr]   Downloaded rsdp v1.1.0
[INFO] [stderr]   Downloaded xmas-elf v0.6.2
[INFO] [stderr]   Downloaded llvm-tools v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] 11143009dd9274d698ec34db83bffe6c8f400b3d51aeff0ef79cd98bb2d69688
[INFO] running `Command { std: "docker" "start" "-a" "11143009dd9274d698ec34db83bffe6c8f400b3d51aeff0ef79cd98bb2d69688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11143009dd9274d698ec34db83bffe6c8f400b3d51aeff0ef79cd98bb2d69688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11143009dd9274d698ec34db83bffe6c8f400b3d51aeff0ef79cd98bb2d69688", kill_on_drop: false }`
[INFO] [stdout] 11143009dd9274d698ec34db83bffe6c8f400b3d51aeff0ef79cd98bb2d69688
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] 9a7bba5b92a06d9d13e558bf715a5f6cc1fe10917ef122172a65269224a0faf6
[INFO] running `Command { std: "docker" "start" "-a" "9a7bba5b92a06d9d13e558bf715a5f6cc1fe10917ef122172a65269224a0faf6", kill_on_drop: false }`
[INFO] [stderr]    Compiling bootloader v0.10.8 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | #![feature(asm)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:70:1
[INFO] [stdout]    |
[INFO] [stdout] 70 | #![feature(maybe_uninit_extra)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:71:1
[INFO] [stdout]    |
[INFO] [stdout] 71 | #![feature(maybe_uninit_slice)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `bootloader` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "9a7bba5b92a06d9d13e558bf715a5f6cc1fe10917ef122172a65269224a0faf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a7bba5b92a06d9d13e558bf715a5f6cc1fe10917ef122172a65269224a0faf6", kill_on_drop: false }`
[INFO] [stdout] 9a7bba5b92a06d9d13e558bf715a5f6cc1fe10917ef122172a65269224a0faf6