[INFO] fetching crate roots 0.0.8...
[INFO] testing roots-0.0.8 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate roots 0.0.8 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate roots 0.0.8
[INFO] finished tweaking crates.io crate roots 0.0.8
[INFO] tweaked toml for crates.io crate roots 0.0.8 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate roots 0.0.8 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 63 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.8.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a62b7889dad1d2405f69b774e76ef9404c4fb4596e81534699752c1aebefb4b
[INFO] running `Command { std: "docker" "start" "-a" "9a62b7889dad1d2405f69b774e76ef9404c4fb4596e81534699752c1aebefb4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a62b7889dad1d2405f69b774e76ef9404c4fb4596e81534699752c1aebefb4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a62b7889dad1d2405f69b774e76ef9404c4fb4596e81534699752c1aebefb4b", kill_on_drop: false }`
[INFO] [stdout] 9a62b7889dad1d2405f69b774e76ef9404c4fb4596e81534699752c1aebefb4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df1f8fdd21d74dd513813c433bea67f20c927f3c2bf2c1e0a57b440802bfb684
[INFO] running `Command { std: "docker" "start" "-a" "df1f8fdd21d74dd513813c433bea67f20c927f3c2bf2c1e0a57b440802bfb684", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling roots v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/numerical/polynom.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | trait Polynom<F>
[INFO] [stdout]    |       ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn to_string(&self) -> String;
[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 0.53s
[INFO] running `Command { std: "docker" "inspect" "df1f8fdd21d74dd513813c433bea67f20c927f3c2bf2c1e0a57b440802bfb684", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df1f8fdd21d74dd513813c433bea67f20c927f3c2bf2c1e0a57b440802bfb684", kill_on_drop: false }`
[INFO] [stdout] df1f8fdd21d74dd513813c433bea67f20c927f3c2bf2c1e0a57b440802bfb684
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce56cbcb904c1d97d09e45e80ecb7006f2130f30d4b55f73220ba9ecee5e7dbc
[INFO] running `Command { std: "docker" "start" "-a" "ce56cbcb904c1d97d09e45e80ecb7006f2130f30d4b55f73220ba9ecee5e7dbc", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling half v1.8.3
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/numerical/polynom.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | trait Polynom<F>
[INFO] [stdout]    |       ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn to_string(&self) -> String;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion-plot v0.4.5
[INFO] [stderr]    Compiling criterion v0.3.6
[INFO] [stderr]    Compiling roots v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/numerical/polynom.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | trait Polynom<F>
[INFO] [stdout]    |       ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn to_string(&self) -> String;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 12.21s
[INFO] running `Command { std: "docker" "inspect" "ce56cbcb904c1d97d09e45e80ecb7006f2130f30d4b55f73220ba9ecee5e7dbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce56cbcb904c1d97d09e45e80ecb7006f2130f30d4b55f73220ba9ecee5e7dbc", kill_on_drop: false }`
[INFO] [stdout] ce56cbcb904c1d97d09e45e80ecb7006f2130f30d4b55f73220ba9ecee5e7dbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b414f0542a8717faf904eed9705869b76fa26e41c9664713effd5abe7d293812
[INFO] running `Command { std: "docker" "start" "-a" "b414f0542a8717faf904eed9705869b76fa26e41c9664713effd5abe7d293812", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: method `to_string` is never used
[INFO] [stderr]   --> src/numerical/polynom.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | trait Polynom<F>
[INFO] [stderr]    |       ------- method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 51 |     fn to_string(&self) -> String;
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `roots` (lib) generated 1 warning
[INFO] [stderr] warning: `roots` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/roots-b8ae0e2ad1084813)
[INFO] [stdout] running 38 tests
[INFO] [stdout] test analytical::cubic::test::test_find_roots_cubic ... ok
[INFO] [stdout] test analytical::cubic_normalized::test::test_find_roots_cubic_normalized ... ok
[INFO] [stdout] test analytical::biquadratic::test::test_find_roots_biquadratic ... ok
[INFO] [stdout] test analytical::linear::test::test_find_roots_linear ... ok
[INFO] [stdout] test analytical::cubic_depressed::test::test_find_roots_cubic_depressed ... ok
[INFO] [stdout] test analytical::quadratic::test::test_find_roots_quadratic ... ok
[INFO] [stdout] test analytical::quadratic::test::test_find_roots_quadratic_big_a1 ... ok
[INFO] [stdout] test analytical::cubic_normalized::test::test_find_roots_cubic_normalized_huge_discriminant ... ok
[INFO] [stdout] test analytical::cubic::test::test_find_roots_cubic_small_discriminant ... ok
[INFO] [stdout] test analytical::quadratic::test::test_find_roots_quadratic_small_a2 ... ok
[INFO] [stdout] test analytical::quartic::test::test_find_roots_quartic ... ok
[INFO] [stdout] test analytical::quartic::test::test_find_roots_quartic_quadruple_root ... ok
[INFO] [stdout] test analytical::quartic::test::test_find_roots_quartic_triple_root ... ok
[INFO] [stdout] test analytical::roots::test_roots ... ok
[INFO] [stdout] test analytical::quartic::test::test_find_roots_quartic_tim_luecke ... ok
[INFO] [stdout] test numerical::brent::test::test_find_root_brent_simple ... ok
[INFO] [stdout] test numerical::eigen::test::test_find_roots_eigen ... ok
[INFO] [stdout] test numerical::eigen::test::test_find_roots_eigen_huge_discriminant ... ok
[INFO] [stdout] test numerical::eigen::test::test_find_roots_eigen_tim_lueke ... ok
[INFO] [stdout] test numerical::inverse_quadratic::test::test_find_root_inverse_quadratic ... ok
[INFO] [stdout] test float::test_float_cbrt ... ok
[INFO] [stdout] test numerical::inverse_quadratic::test::test_from_three_points ... ok
[INFO] [stdout] test numerical::newton_raphson::test::test_find_root_newton_raphson ... ok
[INFO] [stdout] test numerical::polynom::test::find_roots_sturm_7 ... ok
[INFO] [stdout] test numerical::polynom::test::find_roots_sturm_tim_lueke ... ok
[INFO] [stdout] test numerical::polynom::test::test_derivative_polynom_3 ... ok
[INFO] [stdout] test numerical::polynom::test::test_derivative_polynom_5 ... ok
[INFO] [stdout] test numerical::polynom::test::test_find_roots_sturm ... ok
[INFO] [stdout] test numerical::polynom::test::test_polynom_value ... ok
[INFO] [stdout] test numerical::polynom::test::test_polynom_value_and_derivative ... ok
[INFO] [stdout] test analytical::quartic_depressed::test::test_find_roots_quartic_depressed ... ok
[INFO] [stdout] test numerical::regula_falsi::test::test_find_root_regula_falsi ... ok
[INFO] [stdout] test numerical::brent::test::test_find_root_brent ... ok
[INFO] [stdout] test numerical::secant::test::test_find_root_secant ... ok
[INFO] [stdout] test numerical::test::root_interval_bracketed ... ok
[INFO] [stdout] test numerical::test::root_interval_middle ... ok
[INFO] [stdout] test numerical::test::root_interval_not_bracketed ... ok
[INFO] [stdout] test numerical::test::sample_bracketed ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 38 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests roots
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test src/numerical/newton_raphson.rs - numerical::newton_raphson::find_root_newton_raphson (line 50) ... ok
[INFO] [stdout] test src/analytical/quadratic.rs - analytical::quadratic::find_roots_quadratic (line 34) ... ok
[INFO] [stdout] test src/analytical/biquadratic.rs - analytical::biquadratic::find_roots_biquadratic (line 34) ... ok
[INFO] [stdout] test src/numerical/inverse_quadratic.rs - numerical::inverse_quadratic::find_root_inverse_quadratic (line 80) ... ok
[INFO] [stdout] test src/analytical/cubic_depressed.rs - analytical::cubic_depressed::find_roots_cubic_depressed (line 34) ... ok
[INFO] [stdout] test src/analytical/linear.rs - analytical::linear::find_roots_linear (line 32) ... ok
[INFO] [stdout] test src/analytical/quartic.rs - analytical::quartic::find_roots_quartic (line 70) ... ok
[INFO] [stdout] test src/analytical/quartic_depressed.rs - analytical::quartic_depressed::find_roots_quartic_depressed (line 34) ... ok
[INFO] [stdout] test src/numerical/regula_falsi.rs - numerical::regula_falsi::find_root_regula_falsi (line 60) ... ok
[INFO] [stdout] test src/numerical/eigen.rs - numerical::eigen::find_roots_eigen (line 662) ... ok
[INFO] [stdout] test src/analytical/cubic.rs - analytical::cubic::find_roots_cubic (line 38) ... ok
[INFO] [stdout] test src/numerical/secant.rs - numerical::secant::find_root_secant (line 50) ... ok
[INFO] [stdout] test src/numerical/polynom.rs - numerical::polynom::find_roots_sturm (line 424) ... ok
[INFO] [stdout] test src/analytical/cubic_normalized.rs - analytical::cubic_normalized::find_roots_cubic_normalized (line 36) ... ok
[INFO] [stdout] test src/numerical/brent.rs - numerical::brent::find_root_brent (line 44) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.87s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b414f0542a8717faf904eed9705869b76fa26e41c9664713effd5abe7d293812", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b414f0542a8717faf904eed9705869b76fa26e41c9664713effd5abe7d293812", kill_on_drop: false }`
[INFO] [stdout] b414f0542a8717faf904eed9705869b76fa26e41c9664713effd5abe7d293812
