[INFO] fetching crate ruspiro-uart 0.4.0...
[INFO] testing ruspiro-uart-0.4.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate ruspiro-uart 0.4.0 into /workspace/builds/worker-17/source
[INFO] validating manifest of crates.io crate ruspiro-uart 0.4.0 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-17/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-17/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate ruspiro-uart 0.4.0
[INFO] finished tweaking crates.io crate ruspiro-uart 0.4.0
[INFO] tweaked toml for crates.io crate ruspiro-uart 0.4.0 written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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] 0f78c6eb2a3bb3d8103584d6e04bb65483764a989c799146060ea7294e05fce9
[INFO] running `Command { std: "docker" "start" "-a" "0f78c6eb2a3bb3d8103584d6e04bb65483764a989c799146060ea7294e05fce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f78c6eb2a3bb3d8103584d6e04bb65483764a989c799146060ea7294e05fce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f78c6eb2a3bb3d8103584d6e04bb65483764a989c799146060ea7294e05fce9", kill_on_drop: false }`
[INFO] [stdout] 0f78c6eb2a3bb3d8103584d6e04bb65483764a989c799146060ea7294e05fce9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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] e2da04d5568bb399f38113ec250cf14865753cf2f0f9ff9a5aea7f493bd9b0ea
[INFO] running `Command { std: "docker" "start" "-a" "e2da04d5568bb399f38113ec250cf14865753cf2f0f9ff9a5aea7f493bd9b0ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling ruspiro-register v0.5.5
[INFO] [stderr]    Compiling ruspiro-lock v0.4.3
[INFO] [stderr]    Compiling ruspiro-interrupt v0.4.3
[INFO] [stderr]    Compiling paste v1.0.6
[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/ruspiro-lock-0.4.3/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(asm)]
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruspiro-lock` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e2da04d5568bb399f38113ec250cf14865753cf2f0f9ff9a5aea7f493bd9b0ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2da04d5568bb399f38113ec250cf14865753cf2f0f9ff9a5aea7f493bd9b0ea", kill_on_drop: false }`
[INFO] [stdout] e2da04d5568bb399f38113ec250cf14865753cf2f0f9ff9a5aea7f493bd9b0ea