[INFO] fetching crate float_math 0.0.3...
[INFO] testing float_math-0.0.3 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate float_math 0.0.3 into /workspace/builds/worker-108/source
[INFO] validating manifest of crates.io crate float_math 0.0.3 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 crates.io crate float_math 0.0.3
[INFO] finished tweaking crates.io crate float_math 0.0.3
[INFO] tweaked toml for crates.io crate float_math 0.0.3 written to /workspace/builds/worker-108/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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] 4433fcf0ea384efeffb255ede160827731f3de1878a46cc24cdf9d57226e9c68
[INFO] running `Command { std: "docker" "start" "-a" "4433fcf0ea384efeffb255ede160827731f3de1878a46cc24cdf9d57226e9c68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4433fcf0ea384efeffb255ede160827731f3de1878a46cc24cdf9d57226e9c68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4433fcf0ea384efeffb255ede160827731f3de1878a46cc24cdf9d57226e9c68", kill_on_drop: false }`
[INFO] [stdout] 4433fcf0ea384efeffb255ede160827731f3de1878a46cc24cdf9d57226e9c68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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] bf7829e25bfdebc31b57463854304c64cf324e6d16f189707ba5672682bf8a36
[INFO] running `Command { std: "docker" "start" "-a" "bf7829e25bfdebc31b57463854304c64cf324e6d16f189707ba5672682bf8a36", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytemuck v1.7.3
[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/bytemuck-1.7.3/src/lib.rs:3:56
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(feature = "nightly_portable_simd", feature(portable_simd))]
[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 `bytemuck` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bf7829e25bfdebc31b57463854304c64cf324e6d16f189707ba5672682bf8a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf7829e25bfdebc31b57463854304c64cf324e6d16f189707ba5672682bf8a36", kill_on_drop: false }`
[INFO] [stdout] bf7829e25bfdebc31b57463854304c64cf324e6d16f189707ba5672682bf8a36