[INFO] cloning repository https://github.com/jaydon2020/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jaydon2020/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaydon2020%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaydon2020%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e600650d405d2f35ad42863e2d7d5b9081ca4cb4
[INFO] testing jaydon2020/learn-rust against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaydon2020%2Flearn-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/jaydon2020/learn-rust
[INFO] finished tweaking git repo https://github.com/jaydon2020/learn-rust
[INFO] tweaked toml for git repo https://github.com/jaydon2020/learn-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jaydon2020/learn-rust 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/jaydon2020/learn-rust 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] 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] 4daebb2de61945da00b2b21646507118859eeddd50e99998b3cec8dd328c07fe
[INFO] running `Command { std: "docker" "start" "-a" "4daebb2de61945da00b2b21646507118859eeddd50e99998b3cec8dd328c07fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4daebb2de61945da00b2b21646507118859eeddd50e99998b3cec8dd328c07fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4daebb2de61945da00b2b21646507118859eeddd50e99998b3cec8dd328c07fe", kill_on_drop: false }`
[INFO] [stdout] 4daebb2de61945da00b2b21646507118859eeddd50e99998b3cec8dd328c07fe
[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] e43d596bfc7188c28e37729063851f7df64cefcb5d5986fe29ba944ae82ce106
[INFO] running `Command { std: "docker" "start" "-a" "e43d596bfc7188c28e37729063851f7df64cefcb5d5986fe29ba944ae82ce106", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling thiserror v1.0.63
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]    Compiling toml_datetime v0.6.6
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling ndarray v0.15.6
[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling etrace v1.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.63
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling rand_distr v0.4.3
[INFO] [stderr]    Compiling pest v2.7.11
[INFO] [stderr]    Compiling ntest_timeout v0.9.3
[INFO] [stderr]    Compiling ntest_test_cases v0.9.3
[INFO] [stderr]    Compiling ntest v0.9.3
[INFO] [stderr]    Compiling pest_meta v2.7.11
[INFO] [stderr]    Compiling pest_generator v2.7.11
[INFO] [stderr]    Compiling ndarray-rand v0.14.0
[INFO] [stderr]    Compiling pest_derive v2.7.11
[INFO] [stderr]    Compiling cs220 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 39.82s
[INFO] running `Command { std: "docker" "inspect" "e43d596bfc7188c28e37729063851f7df64cefcb5d5986fe29ba944ae82ce106", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e43d596bfc7188c28e37729063851f7df64cefcb5d5986fe29ba944ae82ce106", kill_on_drop: false }`
[INFO] [stdout] e43d596bfc7188c28e37729063851f7df64cefcb5d5986fe29ba944ae82ce106
[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] 9ed30e937ff1ff259958b386e61d2178da358e7f788ad88c8f56c43be04404a3
[INFO] running `Command { std: "docker" "start" "-a" "9ed30e937ff1ff259958b386e61d2178da358e7f788ad88c8f56c43be04404a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling cs220 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.97s
[INFO] running `Command { std: "docker" "inspect" "9ed30e937ff1ff259958b386e61d2178da358e7f788ad88c8f56c43be04404a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ed30e937ff1ff259958b386e61d2178da358e7f788ad88c8f56c43be04404a3", kill_on_drop: false }`
[INFO] [stdout] 9ed30e937ff1ff259958b386e61d2178da358e7f788ad88c8f56c43be04404a3
[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] d7b4c20c49ae0a6086193594aad6d1af5080fb6e33f0544d0fa569e8f5f8d528
[INFO] running `Command { std: "docker" "start" "-a" "d7b4c20c49ae0a6086193594aad6d1af5080fb6e33f0544d0fa569e8f5f8d528", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/cs220-e8b0f879d91e8950)
[INFO] [stdout] 
[INFO] [stdout] running 107 tests
[INFO] [stdout] test assignments::assignment01::small_exercises_grade::test::test_sub_overflow ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_chooses ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_fahrenheit ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_gcd ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_capitalize ... ok
[INFO] [stdout] test assignments::assignment02::vec_and_mat_grade::test::test_inverse ... ok
[INFO] [stdout] test assignments::assignment01::small_exercises_grade::test::test_add_7_3 ... ok
[INFO] [stdout] test assignments::assignment01::small_exercises_grade::test::test_add_overflow ... ok
[INFO] [stdout] test assignments::assignment01::small_exercises_grade::test::test_sub_7_3 ... ok
[INFO] [stdout] test assignments::assignment03::custom_operators_grade::test::test_my_map ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_sum_array ... ok
[INFO] [stdout] test assignments::assignment03::custom_operators_grade::test::test_my_option_op_or ... ok
[INFO] [stdout] test assignments::assignment03::parse_shell_grade::test::test_shell ... ok
[INFO] [stdout] test assignments::assignment03::small_exercises_grade::test::test_editor ... ok
[INFO] [stdout] test assignments::assignment03::small_exercises_grade::test::test_median ... ok
[INFO] [stdout] test assignments::assignment03::small_exercises_grade::test::test_next_weekday ... ok
[INFO] [stdout] test assignments::assignment03::small_exercises_grade::test::test_mode ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_up3 ... ok
[INFO] [stdout] test assignments::assignment02::small_exercises_grade::test::test_zip ... ok
[INFO] [stdout] test assignments::assignment02::vec_and_mat_grade::test::test_fibonacci ... ok
[INFO] [stdout] test assignments::assignment03::custom_operators_grade::test::test_my_and_then ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_123 ... ok
[INFO] [stdout] test assignments::assignment03::small_exercises_grade::test::test_piglatin ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_polynomial_f64 ... ok
[INFO] [stdout] test assignments::assignment04::grade::test::test_context_calc_command ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_2x_3 ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_polynomial_u64 ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_2x3_3x2_5x_12 ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_24x ... ok
[INFO] [stdout] test assignments::assignment04::grade::test::test_context_calc_expression ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_polynomial_p_u64 ... ok
[INFO] [stdout] test assignments::assignment06::symbolic_differentiation_grade::test::test_differentiate_complex ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_polynomial_xy ... ok
[INFO] [stdout] test assignments::assignment04::grade::test::test_parse ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_x ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_zero_remove ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_x3 ... ok
[INFO] [stdout] test assignments::assignment06::symbolic_differentiation_grade::test::test_rational_simpl ... ok
[INFO] [stdout] test assignments::assignment06::symbolic_differentiation_grade::test::test_rational_arithmetic ... ok
[INFO] [stdout] test assignments::assignment07::my_itertools_grade::test::test_itertools ... ok
[INFO] [stdout] test assignments::assignment06::symbolic_differentiation_grade::test::test_differentiate_simple ... ok
[INFO] [stdout] test assignments::assignment07::small_exercises_grade::test::test_fib_iter ... ok
[INFO] [stdout] test assignments::assignment07::generator_grade::test::test_generator ... ok
[INFO] [stdout] test assignments::assignment07::small_exercises_grade::test::test_find_usize ... ok
[INFO] [stdout] test assignments::assignment03::small_exercises_grade::test::test_organize ... ok
[INFO] [stdout] test assignments::assignment06::semiring_grade::test::test_x5_1 ... ok
[INFO] [stdout] test assignments::assignment07::small_exercises_grade::test::test_find ... ok
[INFO] [stdout] test assignments::assignment07::small_exercises_grade::test::test_range_iter ... ok
[INFO] [stdout] test assignments::assignment07::small_exercises_grade::test::test_small ... ok
[INFO] [stdout] test assignments::assignment07::transform_grade::test::test_transform_tuple ... ok
[INFO] [stdout] test assignments::assignment07::transform_grade::test::test_transform_identity ... ok
[INFO] [stdout] test assignments::assignment08::small_exercises_grade::test::test_count_repeat ... ok
[INFO] [stdout] test assignments::assignment08::small_exercises_grade::test::test_either2_map ... ok
[INFO] [stdout] test assignments::assignment08::small_exercises_grade::test::test_funny_map ... ok
[INFO] [stdout] test assignments::assignment08::small_exercises_grade::test::test_repeat ... ok
[INFO] [stdout] test assignments::assignment09::bigint_grade::test::test_inf_prec_complex ... ok
[INFO] [stdout] test assignments::assignment07::transform_grade::test::test_transform_repeat ... ok
[INFO] [stdout] test assignments::assignment07::transform_grade::test::test_transform_repeat_until_converge ... ok
[INFO] [stdout] test assignments::assignment09::bigint_grade::test::test_inf_prec_simple ... ok
[INFO] [stdout] test assignments::assignment06::symbolic_differentiation_grade::test::test_rational_arithmetic_long ... ok
[INFO] [stderr] 
[INFO] [stderr] thread 'assignments::assignment08::church_grade::test::engineering_isnt_just_mathematics' (72) has overflowed its stack
[INFO] [stderr] fatal runtime error: stack overflow, aborting
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/cs220-e8b0f879d91e8950` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "d7b4c20c49ae0a6086193594aad6d1af5080fb6e33f0544d0fa569e8f5f8d528", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7b4c20c49ae0a6086193594aad6d1af5080fb6e33f0544d0fa569e8f5f8d528", kill_on_drop: false }`
[INFO] [stdout] d7b4c20c49ae0a6086193594aad6d1af5080fb6e33f0544d0fa569e8f5f8d528
