[INFO] fetching crate sklears-core 0.1.0-alpha.1...
[INFO] testing sklears-core-0.1.0-alpha.1 against 1.91.0 for beta-1.92-2
[INFO] extracting crate sklears-core 0.1.0-alpha.1 into /workspace/builds/worker-4-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sklears-core 0.1.0-alpha.1 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8008aa63f3d433ca530fb10f852a5c7763777ce506c63c65f1c9cd0350f6b892
[INFO] running `Command { std: "docker" "start" "-a" "8008aa63f3d433ca530fb10f852a5c7763777ce506c63c65f1c9cd0350f6b892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8008aa63f3d433ca530fb10f852a5c7763777ce506c63c65f1c9cd0350f6b892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8008aa63f3d433ca530fb10f852a5c7763777ce506c63c65f1c9cd0350f6b892", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0620d0e4b58b2d78b37ca0606b41044e4f0bb2ee2b4ad6c80f6d57143cc2fb33
[INFO] running `Command { std: "docker" "start" "-a" "0620d0e4b58b2d78b37ca0606b41044e4f0bb2ee2b4ad6c80f6d57143cc2fb33", kill_on_drop: false }`
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[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 32s
[INFO] running `Command { std: "docker" "inspect" "0620d0e4b58b2d78b37ca0606b41044e4f0bb2ee2b4ad6c80f6d57143cc2fb33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0620d0e4b58b2d78b37ca0606b41044e4f0bb2ee2b4ad6c80f6d57143cc2fb33", kill_on_drop: false }`
[INFO] [stdout] 0620d0e4b58b2d78b37ca0606b41044e4f0bb2ee2b4ad6c80f6d57143cc2fb33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] acaafd4fd8814d751eb8896bc138483e7d74949460078378e9c9f8889380f046
[INFO] running `Command { std: "docker" "start" "-a" "acaafd4fd8814d751eb8896bc138483e7d74949460078378e9c9f8889380f046", kill_on_drop: false }`
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[INFO] [stderr]    Compiling bit-set v0.8.0
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[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling criterion-plot v0.5.0
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[INFO] [stderr]    Compiling plotters v0.3.7
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[INFO] [stderr]    Compiling ndarray v0.16.1
[INFO] [stderr]    Compiling clap v4.5.48
[INFO] [stderr]    Compiling criterion v0.5.1
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v1.8.0
[INFO] [stderr]    Compiling ndarray-rand v0.15.0
[INFO] [stderr]    Compiling ndarray-linalg v0.17.0
[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/1.91.0-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=390dca533a542982 -C extra-filename=-532b1f04eafafdac --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-b18544e58ea0974e.rmeta --extern bytemuck=/opt/rustwide/target/debug/deps/libbytemuck-3d9c8e4eae49c68d.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-dd5b0233795550d4.rmeta --extern futures_core=/opt/rustwide/target/debug/deps/libfutures_core-02dcfccd95bac8dd.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-1e38e2428975b5a3.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-217f48e92360dc73.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-5be93dbfd08817a3.rmeta --extern numrs2=/opt/rustwide/target/debug/deps/libnumrs2-79c95e335f928755.rlib --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-48b3f49f80d33d9d.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-01de1d5bfa52f380.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-aecc88d1caa11224.rmeta --extern scirs2_core=/opt/rustwide/target/debug/deps/libscirs2_core-6a5f8d1b5439094d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1e6c236078fabf6b.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-2f4d13864e9de637.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-089d9fc65abdaf4b.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-f89ed0c87bb811a5.rmeta --cap-lints=warn -L native=/opt/rustwide/target/debug/build/zstd-sys-e3b8e8bafc65a71d/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" "acaafd4fd8814d751eb8896bc138483e7d74949460078378e9c9f8889380f046", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acaafd4fd8814d751eb8896bc138483e7d74949460078378e9c9f8889380f046", kill_on_drop: false }`
[INFO] [stdout] acaafd4fd8814d751eb8896bc138483e7d74949460078378e9c9f8889380f046