[INFO] fetching crate fast-floats 0.2.0...
[INFO] testing fast-floats-0.2.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate fast-floats 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate fast-floats 0.2.0 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] started tweaking crates.io crate fast-floats 0.2.0
[INFO] finished tweaking crates.io crate fast-floats 0.2.0
[INFO] tweaked toml for crates.io crate fast-floats 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate fast-floats 0.2.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] c801ae082ef390d0efea12521cfde008eca9585fbaab713ae6270f4f21e5bb6c
[INFO] running `Command { std: "docker" "start" "-a" "c801ae082ef390d0efea12521cfde008eca9585fbaab713ae6270f4f21e5bb6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c801ae082ef390d0efea12521cfde008eca9585fbaab713ae6270f4f21e5bb6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c801ae082ef390d0efea12521cfde008eca9585fbaab713ae6270f4f21e5bb6c", kill_on_drop: false }`
[INFO] [stdout] c801ae082ef390d0efea12521cfde008eca9585fbaab713ae6270f4f21e5bb6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 8c76e9b56d3f013bd0472d4dd69e349989324e4ab50bb0df04e822c91a40585d
[INFO] running `Command { std: "docker" "start" "-a" "8c76e9b56d3f013bd0472d4dd69e349989324e4ab50bb0df04e822c91a40585d", kill_on_drop: false }`
[INFO] [stderr]    Compiling fast-floats v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(core_intrinsics)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fast-floats` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8c76e9b56d3f013bd0472d4dd69e349989324e4ab50bb0df04e822c91a40585d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c76e9b56d3f013bd0472d4dd69e349989324e4ab50bb0df04e822c91a40585d", kill_on_drop: false }`
[INFO] [stdout] 8c76e9b56d3f013bd0472d4dd69e349989324e4ab50bb0df04e822c91a40585d