[INFO] fetching crate libertyos_kernel 0.15.7...
[INFO] testing libertyos_kernel-0.15.7 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate libertyos_kernel 0.15.7 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate libertyos_kernel 0.15.7 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-46/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-46/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate libertyos_kernel 0.15.7
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate libertyos_kernel 0.15.7
[INFO] tweaked toml for crates.io crate libertyos_kernel 0.15.7 written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] crate crates.io crate libertyos_kernel 0.15.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e86ca36b1629da8f456cd7f2d9fa40bd735611b8ea0881d40c1b465010b999c5
[INFO] running `Command { std: "docker" "start" "-a" "e86ca36b1629da8f456cd7f2d9fa40bd735611b8ea0881d40c1b465010b999c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e86ca36b1629da8f456cd7f2d9fa40bd735611b8ea0881d40c1b465010b999c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e86ca36b1629da8f456cd7f2d9fa40bd735611b8ea0881d40c1b465010b999c5", kill_on_drop: false }`
[INFO] [stdout] e86ca36b1629da8f456cd7f2d9fa40bd735611b8ea0881d40c1b465010b999c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df68449bf39bd27169b25dad4d9cedad957619def099fcd4c1e38634864d49fc
[INFO] running `Command { std: "docker" "start" "-a" "df68449bf39bd27169b25dad4d9cedad957619def099fcd4c1e38634864d49fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling az v1.2.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling x86_64 v0.14.7
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]    Compiling volatile v0.4.4
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling funty v1.2.0
[INFO] [stderr]    Compiling bootloader v0.9.21
[INFO] [stderr]    Compiling micromath v1.1.1
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling conquer-util v0.3.0
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling font8x8 v0.3.1
[INFO] [stderr]    Compiling conquer-util v0.2.0
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling block_device v0.1.2
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling pc-keyboard v0.5.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling raw-cpuid v10.2.0
[INFO] [stderr]    Compiling fat32 v0.2.0
[INFO] [stderr]    Compiling wyz v0.4.0
[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/lock_api-0.4.5/src/lib.rs:93:34
[INFO] [stdout]    |
[INFO] [stdout] 93 | #![cfg_attr(feature = "nightly", feature(const_fn_trait_bound))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_fn_trait_bound` has been stable since 1.61.0 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 `lock_api` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "df68449bf39bd27169b25dad4d9cedad957619def099fcd4c1e38634864d49fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df68449bf39bd27169b25dad4d9cedad957619def099fcd4c1e38634864d49fc", kill_on_drop: false }`
[INFO] [stdout] df68449bf39bd27169b25dad4d9cedad957619def099fcd4c1e38634864d49fc