[INFO] cloning repository https://github.com/lopez86/rust-mlearn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lopez86/rust-mlearn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flopez86%2Frust-mlearn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flopez86%2Frust-mlearn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 71198456a7207590b9c519b552464feab0f57d1f
[INFO] testing lopez86/rust-mlearn against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flopez86%2Frust-mlearn" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lopez86/rust-mlearn
[INFO] finished tweaking git repo https://github.com/lopez86/rust-mlearn
[INFO] tweaked toml for git repo https://github.com/lopez86/rust-mlearn written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lopez86/rust-mlearn on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lopez86/rust-mlearn 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-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2789f597927087deb68e093fc7119c3cecfddea1ea87ae88607b4e1bbbe5b40
[INFO] running `Command { std: "docker" "start" "-a" "b2789f597927087deb68e093fc7119c3cecfddea1ea87ae88607b4e1bbbe5b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2789f597927087deb68e093fc7119c3cecfddea1ea87ae88607b4e1bbbe5b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2789f597927087deb68e093fc7119c3cecfddea1ea87ae88607b4e1bbbe5b40", kill_on_drop: false }`
[INFO] [stdout] b2789f597927087deb68e093fc7119c3cecfddea1ea87ae88607b4e1bbbe5b40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9958cdcb36e7a09d4b9a76271cf73d1794501fd64efe7c1c2e8648cff5aa15c
[INFO] running `Command { std: "docker" "start" "-a" "d9958cdcb36e7a09d4b9a76271cf73d1794501fd64efe7c1c2e8648cff5aa15c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling blas-src v0.2.1
[INFO] [stderr]    Compiling blas-src v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling lapack-src v0.4.0
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling cblas-sys v0.1.4
[INFO] [stderr]    Compiling lapacke-sys v0.1.4
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling cauchy v0.2.2
[INFO] [stderr]    Compiling lapacke v0.2.0
[INFO] [stderr]    Compiling ndarray-rand v0.11.0
[INFO] [stderr]    Compiling ndarray-linalg v0.12.0
[INFO] [stderr]    Compiling mlearn v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `SimpleNewtonsMethodOptimizer` is never constructed
[INFO] [stdout]   --> src/logistic_regression.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | struct SimpleNewtonsMethodOptimizer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.80s
[INFO] running `Command { std: "docker" "inspect" "d9958cdcb36e7a09d4b9a76271cf73d1794501fd64efe7c1c2e8648cff5aa15c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9958cdcb36e7a09d4b9a76271cf73d1794501fd64efe7c1c2e8648cff5aa15c", kill_on_drop: false }`
[INFO] [stdout] d9958cdcb36e7a09d4b9a76271cf73d1794501fd64efe7c1c2e8648cff5aa15c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5faf383bef40a32fe31b15d57bc104b46ffc27e09d88776c72e79214e7e5d188
[INFO] running `Command { std: "docker" "start" "-a" "5faf383bef40a32fe31b15d57bc104b46ffc27e09d88776c72e79214e7e5d188", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stdout] warning: struct `SimpleNewtonsMethodOptimizer` is never constructed
[INFO] [stdout]   --> src/logistic_regression.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | struct SimpleNewtonsMethodOptimizer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling netlib-src v0.7.4
[INFO] [stderr]    Compiling mlearn v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3m 39s
[INFO] running `Command { std: "docker" "inspect" "5faf383bef40a32fe31b15d57bc104b46ffc27e09d88776c72e79214e7e5d188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5faf383bef40a32fe31b15d57bc104b46ffc27e09d88776c72e79214e7e5d188", kill_on_drop: false }`
[INFO] [stdout] 5faf383bef40a32fe31b15d57bc104b46ffc27e09d88776c72e79214e7e5d188
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4df95a82fca7236a9b1bddf3e7f64c72e2f8927790eaf8910fc7fdd47b4d1b7d
[INFO] running `Command { std: "docker" "start" "-a" "4df95a82fca7236a9b1bddf3e7f64c72e2f8927790eaf8910fc7fdd47b4d1b7d", kill_on_drop: false }`
[INFO] [stderr] warning: struct `SimpleNewtonsMethodOptimizer` is never constructed
[INFO] [stderr]   --> src/logistic_regression.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 | struct SimpleNewtonsMethodOptimizer {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mlearn` (lib) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mlearn-027b8e43f4b6d791)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test linear_regression::tests::test_linear_regressor ... ok
[INFO] [stdout] test linear_regression::tests::test_zero_initializer ... ok
[INFO] [stdout] test logistic_regression::tests::test_logistic_regression_probabilities ... ok
[INFO] [stdout] test logistic_regression::tests::test_logistic_regression_predictions ... ok
[INFO] [stdout] test metrics::tests::test_mean_absolute_error ... ok
[INFO] [stdout] test metrics::tests::test_mean_squared_error ... ok
[INFO] [stdout] test linear_regression::tests::test_linear_matrix_solver ... ok
[INFO] [stdout] test linear_regression::tests::test_regularized_matrix_solver ... ok
[INFO] [stdout] test logistic_regression::tests::test_newtons_method_optimization ... ok
[INFO] [stdout] test linear_regression::tests::test_solve_singular_matrix - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mlearn
[INFO] [stderr] warning: unexpected character `.`
[INFO] [stderr]   --> src/lib.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr]  1 | / //! # mlearn: Machine Learning Tools in Rust
[INFO] [stderr]  2 | | //!
[INFO] [stderr]  3 | | //! This package is meant to provide various machine learning tools
[INFO] [stderr]  4 | | //! implemented in Rust.
[INFO] [stderr] ...  |
[INFO] [stderr] 26 | | //! println!("{}", model.coefficients);
[INFO] [stderr] 27 | | //! ```
[INFO] [stderr]    | |_______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(rustdoc::invalid_codeblock_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4df95a82fca7236a9b1bddf3e7f64c72e2f8927790eaf8910fc7fdd47b4d1b7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4df95a82fca7236a9b1bddf3e7f64c72e2f8927790eaf8910fc7fdd47b4d1b7d", kill_on_drop: false }`
[INFO] [stdout] 4df95a82fca7236a9b1bddf3e7f64c72e2f8927790eaf8910fc7fdd47b4d1b7d
