[INFO] fetching crate sklears-core 0.1.0-alpha.1...
[INFO] testing sklears-core-0.1.0-alpha.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate sklears-core 0.1.0-alpha.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate sklears-core 0.1.0-alpha.1
[INFO] finished tweaking crates.io crate sklears-core 0.1.0-alpha.1
[INFO] tweaked toml for crates.io crate sklears-core 0.1.0-alpha.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sklears-core 0.1.0-alpha.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sklears-core 0.1.0-alpha.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d8f61374b14a24e738250a435b2bef07be2f337282d7e6cb7c0db3f51ec0c5b
[INFO] running `Command { std: "docker" "start" "-a" "6d8f61374b14a24e738250a435b2bef07be2f337282d7e6cb7c0db3f51ec0c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d8f61374b14a24e738250a435b2bef07be2f337282d7e6cb7c0db3f51ec0c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d8f61374b14a24e738250a435b2bef07be2f337282d7e6cb7c0db3f51ec0c5b", kill_on_drop: false }`
[INFO] [stdout] 6d8f61374b14a24e738250a435b2bef07be2f337282d7e6cb7c0db3f51ec0c5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c80f7dda27154c8daaeb46bc6471825d8d046f714088ba8f1ed9382e1ee98fd
[INFO] running `Command { std: "docker" "start" "-a" "1c80f7dda27154c8daaeb46bc6471825d8d046f714088ba8f1ed9382e1ee98fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling bytemuck v1.23.2
[INFO] [stderr]    Compiling find-msvc-tools v0.1.2
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling subtle v2.6.1
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[INFO] [stderr]    Compiling either v1.15.0
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[INFO] [stderr]    Compiling crc32fast v1.5.0
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[INFO] [stderr]    Compiling scirs2-core v0.1.0-rc.1
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[INFO] [stderr]    Compiling cc v1.2.39
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rand_chacha v0.9.0
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[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling time v0.3.44
[INFO] [stderr]    Compiling memmap2 v0.9.8
[INFO] [stderr]    Compiling num-rational v0.4.2
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[INFO] [stderr]    Compiling rand_distr v0.4.3
[INFO] [stderr]    Compiling bzip2 v0.6.0
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[INFO] [stderr]    Compiling csv-core v0.1.12
[INFO] [stderr]    Compiling deflate64 v0.1.9
[INFO] [stderr]    Compiling iter-read v1.1.0
[INFO] [stderr]    Compiling ppmd-rust v1.2.1
[INFO] [stderr]    Compiling rand_distr v0.5.1
[INFO] [stderr]    Compiling libz-rs-sys v0.5.2
[INFO] [stderr]    Compiling flate2 v1.1.2
[INFO] [stderr]    Compiling zstd-sys v2.0.16+zstd.1.5.7
[INFO] [stderr]    Compiling regex v1.11.3
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling katexit v0.1.5
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling quickcheck v1.0.3
[INFO] [stderr]    Compiling zeroize v1.8.2
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling uuid v1.18.1
[INFO] [stderr]    Compiling bincode v2.0.1
[INFO] [stderr]    Compiling half v2.6.0
[INFO] [stderr]    Compiling csv v1.3.1
[INFO] [stderr]    Compiling serde-pickle v1.2.0
[INFO] [stderr]    Compiling ndarray v0.16.1
[INFO] [stderr]    Compiling simba v0.9.1
[INFO] [stderr]    Compiling cauchy v0.4.0
[INFO] [stderr]    Compiling zstd v0.13.3
[INFO] [stderr]    Compiling lax v0.17.0
[INFO] [stderr]    Compiling special v0.11.4
[INFO] [stderr]    Compiling zip v5.1.1
[INFO] [stderr]    Compiling ndarray-linalg v0.17.0
[INFO] [stderr]    Compiling ndarray-rand v0.15.0
[INFO] [stderr]    Compiling nalgebra v0.33.2
[INFO] [stderr]    Compiling statrs v0.18.0
[INFO] [stderr]    Compiling scirs2-linalg v0.1.0-rc.1
[INFO] [stderr]    Compiling scirs2-stats v0.1.0-rc.1
[INFO] [stderr]    Compiling numrs2 v0.1.0-beta.3
[INFO] [stderr]    Compiling sklears-core v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 18s
[INFO] running `Command { std: "docker" "inspect" "1c80f7dda27154c8daaeb46bc6471825d8d046f714088ba8f1ed9382e1ee98fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c80f7dda27154c8daaeb46bc6471825d8d046f714088ba8f1ed9382e1ee98fd", kill_on_drop: false }`
[INFO] [stdout] 1c80f7dda27154c8daaeb46bc6471825d8d046f714088ba8f1ed9382e1ee98fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a9de0c2f3336649581e7f7f16b1c59783825fb26577538334b223d75fbc6ab6
[INFO] running `Command { std: "docker" "start" "-a" "1a9de0c2f3336649581e7f7f16b1c59783825fb26577538334b223d75fbc6ab6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling bitflags v2.9.4
[INFO] [stderr]    Compiling anstyle v1.0.13
[INFO] [stderr]    Compiling plotters-backend v0.3.7
[INFO] [stderr]    Compiling ciborium-io v0.2.2
[INFO] [stderr]    Compiling clap_lex v0.7.5
[INFO] [stderr]    Compiling wait-timeout v0.2.1
[INFO] [stderr]    Compiling bit-vec v0.8.0
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling rand_xorshift v0.4.0
[INFO] [stderr]    Compiling is-terminal v0.4.16
[INFO] [stderr]    Compiling anes v0.1.6
[INFO] [stderr]    Compiling unarray v0.1.4
[INFO] [stderr]    Compiling oorandom v11.1.5
[INFO] [stderr]    Compiling ciborium-ll v0.2.2
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling plotters-svg v0.3.7
[INFO] [stderr]    Compiling criterion-plot v0.5.0
[INFO] [stderr]    Compiling bit-set v0.8.0
[INFO] [stderr]    Compiling plotters v0.3.7
[INFO] [stderr]    Compiling clap_builder v4.5.48
[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling tempfile v3.23.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v1.8.0
[INFO] [stderr]    Compiling ndarray v0.16.1
[INFO] [stderr]    Compiling clap v4.5.48
[INFO] [stderr]    Compiling criterion v0.5.1
[INFO] [stderr]    Compiling ndarray-linalg v0.17.0
[INFO] [stderr]    Compiling ndarray-rand v0.15.0
[INFO] [stderr]    Compiling scirs2-core v0.1.0-rc.1
[INFO] [stderr]    Compiling scirs2-linalg v0.1.0-rc.1
[INFO] [stderr]    Compiling scirs2-stats v0.1.0-rc.1
[INFO] [stderr]    Compiling numrs2 v0.1.0-beta.3
[INFO] [stderr]    Compiling sklears-core v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `FloatBounds`
[INFO] [stdout]  --> src/property_tests.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::types::{FloatBounds, LearningRate, Probability, RegularizationStrength};
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `engine`
[INFO] [stdout]     --> src/compile_time_macros.rs:1143:13
[INFO] [stdout]      |
[INFO] [stdout] 1143 |         let engine = VerificationEngine::new(config);
[INFO] [stdout]      |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_engine`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]     --> src/interactive_playground.rs:2211:13
[INFO] [stdout]      |
[INFO] [stdout] 2211 |         let index = search_engine.build_search_index(&api_ref).unwrap();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `contract`
[INFO] [stdout]     --> src/test_utilities.rs:1291:46
[INFO] [stdout]      |
[INFO] [stdout] 1291 |         pub fn add_contract<T, C>(&mut self, contract: C)
[INFO] [stdout]      |                                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_contract`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `implementation`
[INFO] [stdout]     --> src/test_utilities.rs:1301:38
[INFO] [stdout]      |
[INFO] [stdout] 1301 |         pub fn run_all<T>(&mut self, implementation: &T) -> Vec<ContractResult>
[INFO] [stdout]      |                                      ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_implementation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sklears-core` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-10-28-x86_64-unknown-linux-gnu/bin/rustc --crate-name sklears_core --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="serde"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("all_algorithms", "all_formats", "arrow", "async_support", "auto_benchmarks", "autodiff", "binary", "binary_full", "clustering", "compile_time_macros", "compression", "custom_lints", "debug_assertions", "default", "dimensionality_reduction", "distributed", "dynamic_loading", "effect_types", "ensemble_methods", "exotic_hardware", "experimental", "full", "gpu_support", "linear_models", "messagepack", "metrics", "mmap", "model_selection", "neural_networks", "no_std", "parallel", "plugins", "polars", "preprocessing", "profiling", "serde", "simd", "std", "streaming", "tree_models", "validation"))' -C metadata=ebe6afd7f4459d3e -C extra-filename=-cad368925ea20d2d --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-710b4f9e7a859a5a.rmeta --extern bytemuck=/opt/rustwide/target/debug/deps/libbytemuck-e484028acf41162a.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-973b548bed2d71fc.rmeta --extern futures_core=/opt/rustwide/target/debug/deps/libfutures_core-3b920243fce8fec0.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-7a54cdb917ea7291.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-28ade3d6717210f3.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-5cf65391f8c4acac.rmeta --extern numrs2=/opt/rustwide/target/debug/deps/libnumrs2-6a7edc281c15a4c6.rlib --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-ef4e98f908de55f8.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-f07e056253a3c8bc.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-efc9c1dfc111d886.rmeta --extern scirs2_core=/opt/rustwide/target/debug/deps/libscirs2_core-8433aebffd1d427a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7f45dbe915597930.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-188b8264a216d870.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-dd726d0e5baea0c7.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-922826e69825bae2.rmeta --cap-lints=warn -L native=/opt/rustwide/target/debug/build/zstd-sys-706c9e176c511d25/out -L native=/usr/lib/x86_64-linux-gnu -L native=/usr/lib/x86_64-linux-gnu/openblas-pthread` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1a9de0c2f3336649581e7f7f16b1c59783825fb26577538334b223d75fbc6ab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a9de0c2f3336649581e7f7f16b1c59783825fb26577538334b223d75fbc6ab6", kill_on_drop: false }`
[INFO] [stdout] 1a9de0c2f3336649581e7f7f16b1c59783825fb26577538334b223d75fbc6ab6