[INFO] fetching crate solver 0.0.3-alpha.2...
[INFO] testing solver-0.0.3-alpha.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate solver 0.0.3-alpha.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate solver 0.0.3-alpha.2
[INFO] finished tweaking crates.io crate solver 0.0.3-alpha.2
[INFO] tweaked toml for crates.io crate solver 0.0.3-alpha.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate solver 0.0.3-alpha.2 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]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.6 (available: v0.10.1)
[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] 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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d6f0b1853debe06202aa9483fbfd768ac8b9fef6dc3c79270383767dfa002215
[INFO] running `Command { std: "docker" "start" "-a" "d6f0b1853debe06202aa9483fbfd768ac8b9fef6dc3c79270383767dfa002215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d6f0b1853debe06202aa9483fbfd768ac8b9fef6dc3c79270383767dfa002215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6f0b1853debe06202aa9483fbfd768ac8b9fef6dc3c79270383767dfa002215", kill_on_drop: false }`
[INFO] [stdout] d6f0b1853debe06202aa9483fbfd768ac8b9fef6dc3c79270383767dfa002215
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9213127d3bb7de7f272af9932f5bce3e487c083c284ea0d937260b8a3defc79
[INFO] running `Command { std: "docker" "start" "-a" "f9213127d3bb7de7f272af9932f5bce3e487c083c284ea0d937260b8a3defc79", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.6
[INFO] [stderr]    Compiling solver v0.0.3-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/model.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |         fitness_fn: &'_ dyn Fn(&Individual) -> i32,
[INFO] [stdout]    |                      ^^ the lifetime is elided here
[INFO] [stdout] 21 |         config: Config,
[INFO] [stdout] 22 |     ) -> Model {
[INFO] [stdout]    |          ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     ) -> Model<'_> {
[INFO] [stdout]    |               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/solver.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(model: Model<'_>) -> Solver {
[INFO] [stdout]    |                             ^^      ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'_`
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(model: Model<'_>) -> Solver<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/solver.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_model(&self) -> &Model {
[INFO] [stdout]    |                      ^^^^^     ^^^^^^
[INFO] [stdout]    |                      |         ||
[INFO] [stdout]    |                      |         |the same lifetime is hidden here
[INFO] [stdout]    |                      |         the same lifetime is elided here
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_model(&self) -> &Model<'_> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.96s
[INFO] running `Command { std: "docker" "inspect" "f9213127d3bb7de7f272af9932f5bce3e487c083c284ea0d937260b8a3defc79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9213127d3bb7de7f272af9932f5bce3e487c083c284ea0d937260b8a3defc79", kill_on_drop: false }`
[INFO] [stdout] f9213127d3bb7de7f272af9932f5bce3e487c083c284ea0d937260b8a3defc79
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93c9e27dffbdc945cf149b5952d7f5d29fb73666c8ed3a785eb67b2bd9ccb694
[INFO] running `Command { std: "docker" "start" "-a" "93c9e27dffbdc945cf149b5952d7f5d29fb73666c8ed3a785eb67b2bd9ccb694", kill_on_drop: false }`
[INFO] [stderr]    Compiling solver v0.0.3-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/model.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |         fitness_fn: &'_ dyn Fn(&Individual) -> i32,
[INFO] [stdout]    |                      ^^ the lifetime is elided here
[INFO] [stdout] 21 |         config: Config,
[INFO] [stdout] 22 |     ) -> Model {
[INFO] [stdout]    |          ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     ) -> Model<'_> {
[INFO] [stdout]    |               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/solver.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(model: Model<'_>) -> Solver {
[INFO] [stdout]    |                             ^^      ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'_`
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(model: Model<'_>) -> Solver<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/solver.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_model(&self) -> &Model {
[INFO] [stdout]    |                      ^^^^^     ^^^^^^
[INFO] [stdout]    |                      |         ||
[INFO] [stdout]    |                      |         |the same lifetime is hidden here
[INFO] [stdout]    |                      |         the same lifetime is elided here
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_model(&self) -> &Model<'_> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/model.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |         fitness_fn: &'_ dyn Fn(&Individual) -> i32,
[INFO] [stdout]    |                      ^^ the lifetime is elided here
[INFO] [stdout] 21 |         config: Config,
[INFO] [stdout] 22 |     ) -> Model {
[INFO] [stdout]    |          ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     ) -> Model<'_> {
[INFO] [stdout]    |               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/solver.rs:11:29
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(model: Model<'_>) -> Solver {
[INFO] [stdout]    |                             ^^      ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'_`
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(model: Model<'_>) -> Solver<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/ga/solver.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_model(&self) -> &Model {
[INFO] [stdout]    |                      ^^^^^     ^^^^^^
[INFO] [stdout]    |                      |         ||
[INFO] [stdout]    |                      |         |the same lifetime is hidden here
[INFO] [stdout]    |                      |         the same lifetime is elided here
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn get_model(&self) -> &Model<'_> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "93c9e27dffbdc945cf149b5952d7f5d29fb73666c8ed3a785eb67b2bd9ccb694", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93c9e27dffbdc945cf149b5952d7f5d29fb73666c8ed3a785eb67b2bd9ccb694", kill_on_drop: false }`
[INFO] [stdout] 93c9e27dffbdc945cf149b5952d7f5d29fb73666c8ed3a785eb67b2bd9ccb694
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fd211a691d845626d9979b0a59044378eb90cdb8257a1e23c39ea43937768ddf
[INFO] running `Command { std: "docker" "start" "-a" "fd211a691d845626d9979b0a59044378eb90cdb8257a1e23c39ea43937768ddf", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/ga/model.rs:20:22
[INFO] [stderr]    |
[INFO] [stderr] 20 |         fitness_fn: &'_ dyn Fn(&Individual) -> i32,
[INFO] [stderr]    |                      ^^ the lifetime is elided here
[INFO] [stderr] 21 |         config: Config,
[INFO] [stderr] 22 |     ) -> Model {
[INFO] [stderr]    |          ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 22 |     ) -> Model<'_> {
[INFO] [stderr]    |               ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/ga/solver.rs:11:29
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(model: Model<'_>) -> Solver {
[INFO] [stderr]    |                             ^^      ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                             |
[INFO] [stderr]    |                             the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: consistently use `'_`
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(model: Model<'_>) -> Solver<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/ga/solver.rs:22:22
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn get_model(&self) -> &Model {
[INFO] [stderr]    |                      ^^^^^     ^^^^^^
[INFO] [stderr]    |                      |         ||
[INFO] [stderr]    |                      |         |the same lifetime is hidden here
[INFO] [stderr]    |                      |         the same lifetime is elided here
[INFO] [stderr]    |                      the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn get_model(&self) -> &Model<'_> {
[INFO] [stderr]    |                                      ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `solver` (lib) generated 3 warnings (run `cargo fix --lib -p solver` to apply 3 suggestions)
[INFO] [stderr] warning: `solver` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/solver-868b2fd1d16c5aa6)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test ga::config::tests::test_custom_config ... ok
[INFO] [stdout] test ga::individual::tests::test_individual ... ok
[INFO] [stdout] test ga::model::tests::test_model ... ok
[INFO] [stdout] test ga::model::tests::test_score_population ... ok
[INFO] [stdout] test ga::population::tests::test_population ... ok
[INFO] [stdout] test ga::solver::tests::test_solver ... ok
[INFO] [stdout] test ga::model::tests::test_selection ... ok
[INFO] [stdout] test ga::config::tests::test_default_config ... ok
[INFO] [stdout] test ga::model::tests::test_run ... ok
[INFO] [stdout] test ga::model::tests::test_mutation ... ok
[INFO] [stdout] test ga::model::tests::test_crossover ... ok
[INFO] [stdout] test tests::solve_schedule ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests solver
[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" "fd211a691d845626d9979b0a59044378eb90cdb8257a1e23c39ea43937768ddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd211a691d845626d9979b0a59044378eb90cdb8257a1e23c39ea43937768ddf", kill_on_drop: false }`
[INFO] [stdout] fd211a691d845626d9979b0a59044378eb90cdb8257a1e23c39ea43937768ddf
