[INFO] cloning repository https://github.com/shelmesky/rust_kernel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shelmesky/rust_kernel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelmesky%2Frust_kernel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelmesky%2Frust_kernel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47be8e66c79927ba21247c7a7b090651b5459e80
[INFO] testing shelmesky/rust_kernel against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelmesky%2Frust_kernel" "/workspace/builds/worker-116/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-116/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shelmesky/rust_kernel 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] started tweaking git repo https://github.com/shelmesky/rust_kernel
[INFO] finished tweaking git repo https://github.com/shelmesky/rust_kernel
[INFO] tweaked toml for git repo https://github.com/shelmesky/rust_kernel written to /workspace/builds/worker-116/source/Cargo.toml
[INFO] crate git repo https://github.com/shelmesky/rust_kernel 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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] abb87893e6b54d23fcb7f003fef746f04f1aade96541785620864f13ea8c88f1
[INFO] running `Command { std: "docker" "start" "-a" "abb87893e6b54d23fcb7f003fef746f04f1aade96541785620864f13ea8c88f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abb87893e6b54d23fcb7f003fef746f04f1aade96541785620864f13ea8c88f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abb87893e6b54d23fcb7f003fef746f04f1aade96541785620864f13ea8c88f1", kill_on_drop: false }`
[INFO] [stdout] abb87893e6b54d23fcb7f003fef746f04f1aade96541785620864f13ea8c88f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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] e252a93af8d524bbb9cb7b34abf6a5f923becf8ab6a5c5eacef5e6f8ea37a342
[INFO] running `Command { std: "docker" "start" "-a" "e252a93af8d524bbb9cb7b34abf6a5f923becf8ab6a5c5eacef5e6f8ea37a342", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling usize_conversions v0.2.0
[INFO] [stderr]    Compiling bootloader v0.6.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling xmas-elf v0.6.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/usize_conversions-0.2.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(i128_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `i128_type` has been stable since 1.26.0 and no longer requires an attribute to enable
[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 `usize_conversions` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e252a93af8d524bbb9cb7b34abf6a5f923becf8ab6a5c5eacef5e6f8ea37a342", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e252a93af8d524bbb9cb7b34abf6a5f923becf8ab6a5c5eacef5e6f8ea37a342", kill_on_drop: false }`
[INFO] [stdout] e252a93af8d524bbb9cb7b34abf6a5f923becf8ab6a5c5eacef5e6f8ea37a342