[INFO] cloning repository https://github.com/Jius/repartition-classes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jius/repartition-classes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJius%2Frepartition-classes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJius%2Frepartition-classes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f95362427189a91a1ff15e94bcdd1f6243b6678d
[INFO] testing Jius/repartition-classes against beta-2026-04-21 for beta-1.96-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJius%2Frepartition-classes" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Jius/repartition-classes
[INFO] finished tweaking git repo https://github.com/Jius/repartition-classes
[INFO] tweaked toml for git repo https://github.com/Jius/repartition-classes written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Jius/repartition-classes 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] crate git repo https://github.com/Jius/repartition-classes 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded r-efi v6.0.0
[INFO] [stderr]   Downloaded itoa v1.0.18
[INFO] [stderr]   Downloaded colorchoice v1.0.5
[INFO] [stderr]   Downloaded clap_lex v1.1.0
[INFO] [stderr]   Downloaded anstyle v1.0.14
[INFO] [stderr]   Downloaded anstyle-parse v1.0.0
[INFO] [stderr]   Downloaded tempfile v3.27.0
[INFO] [stderr]   Downloaded anstream v1.0.0
[INFO] [stderr]   Downloaded clap v4.6.0
[INFO] [stderr]   Downloaded getrandom v0.4.2
[INFO] [stderr]   Downloaded clap_derive v4.6.0
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.48
[INFO] [stderr]   Downloaded clap_builder v4.6.0
[INFO] [stderr]   Downloaded winnow v0.7.15
[INFO] [stderr]   Downloaded zerocopy v0.8.48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e32723225154dafdc97902d32f42d49463efce9e39f913014e63c3bf93f03376
[INFO] running `Command { std: "docker" "start" "-a" "e32723225154dafdc97902d32f42d49463efce9e39f913014e63c3bf93f03376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e32723225154dafdc97902d32f42d49463efce9e39f913014e63c3bf93f03376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e32723225154dafdc97902d32f42d49463efce9e39f913014e63c3bf93f03376", kill_on_drop: false }`
[INFO] [stdout] e32723225154dafdc97902d32f42d49463efce9e39f913014e63c3bf93f03376
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 8574a5ad0fdae3936b77b098528ec016da46884777dc8a845f6a2154f202cf7e
[INFO] running `Command { std: "docker" "start" "-a" "8574a5ad0fdae3936b77b098528ec016da46884777dc8a845f6a2154f202cf7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling anstyle v1.0.14
[INFO] [stderr]    Compiling colorchoice v1.0.5
[INFO] [stderr]    Compiling anstyle-parse v1.0.0
[INFO] [stderr]    Compiling winnow v0.7.15
[INFO] [stderr]    Compiling clap_lex v1.1.0
[INFO] [stderr]    Compiling toml_write v0.1.2
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling anstream v1.0.0
[INFO] [stderr]    Compiling clap_builder v4.6.0
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling clap_derive v4.6.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling clap v4.6.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_spanned v0.6.9
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling toml_edit v0.22.27
[INFO] [stderr]    Compiling toml v0.8.23
[INFO] [stderr]    Compiling repartition-classes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.12s
[INFO] running `Command { std: "docker" "inspect" "8574a5ad0fdae3936b77b098528ec016da46884777dc8a845f6a2154f202cf7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8574a5ad0fdae3936b77b098528ec016da46884777dc8a845f6a2154f202cf7e", kill_on_drop: false }`
[INFO] [stdout] 8574a5ad0fdae3936b77b098528ec016da46884777dc8a845f6a2154f202cf7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 36430535ae854c633149f8b3807e379b6667d37cae95655e4c7f952e634e45c0
[INFO] running `Command { std: "docker" "start" "-a" "36430535ae854c633149f8b3807e379b6667d37cae95655e4c7f952e634e45c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling bitflags v2.11.0
[INFO] [stderr]    Compiling linux-raw-sys v0.12.1
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling tempfile v3.27.0
[INFO] [stderr]    Compiling repartition-classes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.37s
[INFO] running `Command { std: "docker" "inspect" "36430535ae854c633149f8b3807e379b6667d37cae95655e4c7f952e634e45c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36430535ae854c633149f8b3807e379b6667d37cae95655e4c7f952e634e45c0", kill_on_drop: false }`
[INFO] [stdout] 36430535ae854c633149f8b3807e379b6667d37cae95655e4c7f952e634e45c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ff0041d072f25b80cf6d0afd09098561ac19b7297c5ff42ad9f800a6c029da33
[INFO] running `Command { std: "docker" "start" "-a" "ff0041d072f25b80cf6d0afd09098561ac19b7297c5ff42ad9f800a6c029da33", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/repartition_classes-c9b79895f014ffdc)
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/repartition_classes-6d5b4402fdb30a60)
[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] [stderr]      Running tests/integration.rs (/opt/rustwide/target/debug/deps/integration-7bfbabb07aee154c)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test dual_class_requires_at_least_one_per_level ... ok
[INFO] [stdout] test flow_infeasible_returns_none ... ok
[INFO] [stdout] test flow_feasible_split ... ok
[INFO] [stdout] test min_students_per_level_in_dual_rejects_imbalanced_pair ... ok
[INFO] [stdout] test duplicate_student_name_rejected ... ok
[INFO] [stdout] test min_students_per_level_in_dual_config_excludes_all_plans_when_only_double_possible ... ok
[INFO] [stdout] test named_students_list_partitioned_by_class_order ... ok
[INFO] [stdout] test one_teacher_two_levels_must_be_double_or_infeasible ... ok
[INFO] [stdout] test forbidden_pair_eliminates_dual ... ok
[INFO] [stdout] test single_class_single_level ... ok
[INFO] [stdout] test imbalanced_requires_split_across_classes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.49s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests repartition_classes
[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" "ff0041d072f25b80cf6d0afd09098561ac19b7297c5ff42ad9f800a6c029da33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff0041d072f25b80cf6d0afd09098561ac19b7297c5ff42ad9f800a6c029da33", kill_on_drop: false }`
[INFO] [stdout] ff0041d072f25b80cf6d0afd09098561ac19b7297c5ff42ad9f800a6c029da33