[INFO] cloning repository https://github.com/rust-osdev/bootloader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-osdev/bootloader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-osdev%2Fbootloader", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-osdev%2Fbootloader'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66637c11f5d459cfb4aa5d4f9538e70f012aa442
[INFO] testing rust-osdev/bootloader against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-osdev%2Fbootloader" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-osdev/bootloader on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-10/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-10/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/rust-osdev/bootloader
[INFO] finished tweaking git repo https://github.com/rust-osdev/bootloader
[INFO] tweaked toml for git repo https://github.com/rust-osdev/bootloader written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-osdev/bootloader already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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 uart_16550 v0.2.14
[INFO] [stderr]   Downloaded uefi-macros v0.3.3
[INFO] [stderr]   Downloaded x86_64 v0.14.7
[INFO] [stderr]   Downloaded ucs2 v0.3.2
[INFO] [stderr]   Downloaded uefi v0.11.0
[INFO] [stderr]   Downloaded bootloader-locator v0.0.4
[INFO] [stderr]   Downloaded fatfs v0.3.5
[INFO] [stderr]   Downloaded noto-sans-mono-bitmap v0.1.2
[INFO] [stderr]   Downloaded xmas-elf v0.8.0
[INFO] [stderr]   Downloaded locate-cargo-manifest v0.2.2
[INFO] [stderr]   Downloaded gpt v2.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25f9241d835acc3beda9842adb9e2da6c51cee2afcfb808b8ecd7e7817ef3ec2
[INFO] running `Command { std: "docker" "start" "-a" "25f9241d835acc3beda9842adb9e2da6c51cee2afcfb808b8ecd7e7817ef3ec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25f9241d835acc3beda9842adb9e2da6c51cee2afcfb808b8ecd7e7817ef3ec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25f9241d835acc3beda9842adb9e2da6c51cee2afcfb808b8ecd7e7817ef3ec2", kill_on_drop: false }`
[INFO] [stdout] 25f9241d835acc3beda9842adb9e2da6c51cee2afcfb808b8ecd7e7817ef3ec2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b478b1365b898c90ab88054f50e218e1241d500b7b97470ac91b00c505ad091b
[INFO] running `Command { std: "docker" "start" "-a" "b478b1365b898c90ab88054f50e218e1241d500b7b97470ac91b00c505ad091b", 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 stable 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" "b478b1365b898c90ab88054f50e218e1241d500b7b97470ac91b00c505ad091b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b478b1365b898c90ab88054f50e218e1241d500b7b97470ac91b00c505ad091b", kill_on_drop: false }`
[INFO] [stdout] b478b1365b898c90ab88054f50e218e1241d500b7b97470ac91b00c505ad091b