[INFO] fetching crate lcpc-brakedown-pc 0.1.1...
[INFO] testing lcpc-brakedown-pc-0.1.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate lcpc-brakedown-pc 0.1.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate lcpc-brakedown-pc 0.1.1
[INFO] finished tweaking crates.io crate lcpc-brakedown-pc 0.1.1
[INFO] tweaked toml for crates.io crate lcpc-brakedown-pc 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate lcpc-brakedown-pc 0.1.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 85 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v2.0.1)
[INFO] [stderr]       Adding ff v0.12.1 (available: v0.13.1)
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.14.0)
[INFO] [stderr]       Adding merlin v2.0.1 (available: v3.0.0)
[INFO] [stderr]       Adding ndarray v0.14.0 (available: v0.16.1)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] [stderr]       Adding rand_chacha v0.3.1 (available: v0.9.0)
[INFO] [stderr]       Adding sprs v0.10.0 (available: v0.11.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4dd9b1b24def80f5c8d882a4eaa9300cab6e850bb53be9c83dc67dcadf6c70c7
[INFO] running `Command { std: "docker" "start" "-a" "4dd9b1b24def80f5c8d882a4eaa9300cab6e850bb53be9c83dc67dcadf6c70c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dd9b1b24def80f5c8d882a4eaa9300cab6e850bb53be9c83dc67dcadf6c70c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dd9b1b24def80f5c8d882a4eaa9300cab6e850bb53be9c83dc67dcadf6c70c7", kill_on_drop: false }`
[INFO] [stdout] 4dd9b1b24def80f5c8d882a4eaa9300cab6e850bb53be9c83dc67dcadf6c70c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fcf3eb4dca62c71964bb6fcd686be320872d2888e8afee20231126fc61257a1b
[INFO] running `Command { std: "docker" "start" "-a" "fcf3eb4dca62c71964bb6fcd686be320872d2888e8afee20231126fc61257a1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling err-derive v0.2.4
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stderr]    Compiling matrixmultiply v0.2.4
[INFO] [stderr]    Compiling wyz v0.5.1
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling keccak v0.1.5
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling num-complex v0.3.1
[INFO] [stderr]    Compiling alga v0.9.3
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling addchain v0.2.0
[INFO] [stderr]    Compiling ff_derive v0.12.1
[INFO] [stderr]    Compiling sprs v0.10.0
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling ff v0.12.1
[INFO] [stderr]    Compiling zeroize v1.8.2
[INFO] [stderr]    Compiling merlin v2.0.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling lcpc-2d v0.1.1
[INFO] [stderr]    Compiling lcpc-brakedown-pc v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(test)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lcpc-brakedown-pc` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "fcf3eb4dca62c71964bb6fcd686be320872d2888e8afee20231126fc61257a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcf3eb4dca62c71964bb6fcd686be320872d2888e8afee20231126fc61257a1b", kill_on_drop: false }`
[INFO] [stdout] fcf3eb4dca62c71964bb6fcd686be320872d2888e8afee20231126fc61257a1b