[INFO] fetching crate fastcwt 0.1.8...
[INFO] testing fastcwt-0.1.8 against 1.75.0 for beta-1.76-1
[INFO] extracting crate fastcwt 0.1.8 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate fastcwt 0.1.8 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fastcwt 0.1.8
[INFO] finished tweaking crates.io crate fastcwt 0.1.8
[INFO] tweaked toml for crates.io crate fastcwt 0.1.8 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d63cd00b1dc5ec1ee4f318e288d9b4e00585992802a8764250c58f6a8df0b0c4
[INFO] running `Command { std: "docker" "start" "-a" "d63cd00b1dc5ec1ee4f318e288d9b4e00585992802a8764250c58f6a8df0b0c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d63cd00b1dc5ec1ee4f318e288d9b4e00585992802a8764250c58f6a8df0b0c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d63cd00b1dc5ec1ee4f318e288d9b4e00585992802a8764250c58f6a8df0b0c4", kill_on_drop: false }`
[INFO] [stdout] d63cd00b1dc5ec1ee4f318e288d9b4e00585992802a8764250c58f6a8df0b0c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08caa2b0ef39f61337414a1a69def943963c8da0cc7b821607928899ad7dc106
[INFO] running `Command { std: "docker" "start" "-a" "08caa2b0ef39f61337414a1a69def943963c8da0cc7b821607928899ad7dc106", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]    Compiling strength_reduce v0.2.4
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling rustfft v6.1.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.17
[INFO] [stderr]    Compiling crossbeam-deque v0.8.4
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling rayon v1.8.0
[INFO] [stderr]    Compiling transpose v0.2.2
[INFO] [stderr]    Compiling primal-check v0.3.3
[INFO] [stderr]    Compiling fastcwt v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | #![feature(core_intrinsics)]
[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 `fastcwt` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "08caa2b0ef39f61337414a1a69def943963c8da0cc7b821607928899ad7dc106", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08caa2b0ef39f61337414a1a69def943963c8da0cc7b821607928899ad7dc106", kill_on_drop: false }`
[INFO] [stdout] 08caa2b0ef39f61337414a1a69def943963c8da0cc7b821607928899ad7dc106
