[INFO] fetching crate school_library 1.0.3...
[INFO] testing school_library-1.0.3 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate school_library 1.0.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate school_library 1.0.3
[INFO] finished tweaking crates.io crate school_library 1.0.3
[INFO] tweaked toml for crates.io crate school_library 1.0.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate school_library 1.0.3 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "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 v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 964657b87c51de5a9552b0925056353662fb99c26f168d89b8238538f6f5faab
[INFO] running `Command { std: "docker" "start" "-a" "964657b87c51de5a9552b0925056353662fb99c26f168d89b8238538f6f5faab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "964657b87c51de5a9552b0925056353662fb99c26f168d89b8238538f6f5faab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "964657b87c51de5a9552b0925056353662fb99c26f168d89b8238538f6f5faab", kill_on_drop: false }`
[INFO] [stdout] 964657b87c51de5a9552b0925056353662fb99c26f168d89b8238538f6f5faab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e0178189b415ec9eeaaa7dab72ffdcffd503a99ba86971b640961f58a985015
[INFO] running `Command { std: "docker" "start" "-a" "3e0178189b415ec9eeaaa7dab72ffdcffd503a99ba86971b640961f58a985015", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling school_library v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `Command { std: "docker" "inspect" "3e0178189b415ec9eeaaa7dab72ffdcffd503a99ba86971b640961f58a985015", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e0178189b415ec9eeaaa7dab72ffdcffd503a99ba86971b640961f58a985015", kill_on_drop: false }`
[INFO] [stdout] 3e0178189b415ec9eeaaa7dab72ffdcffd503a99ba86971b640961f58a985015
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6a66a869ada0f8a4130b495121a7fe357c6e7eead8a58d324c2f5128eec698a
[INFO] running `Command { std: "docker" "start" "-a" "a6a66a869ada0f8a4130b495121a7fe357c6e7eead8a58d324c2f5128eec698a", kill_on_drop: false }`
[INFO] [stderr]    Compiling school_library v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "a6a66a869ada0f8a4130b495121a7fe357c6e7eead8a58d324c2f5128eec698a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6a66a869ada0f8a4130b495121a7fe357c6e7eead8a58d324c2f5128eec698a", kill_on_drop: false }`
[INFO] [stdout] a6a66a869ada0f8a4130b495121a7fe357c6e7eead8a58d324c2f5128eec698a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bad29b3cfc99c0a9b6a9ed373033c522e03a99ae0d15b2c561bfb95f05e33bb0
[INFO] running `Command { std: "docker" "start" "-a" "bad29b3cfc99c0a9b6a9ed373033c522e03a99ae0d15b2c561bfb95f05e33bb0", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/school_library-44da4fd4c04243a8)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test school::tests::test_add_class ... ok
[INFO] [stdout] test school::tests::test_add_student_to_class ... ok
[INFO] [stdout] test school::tests::test_class_cloning ... ok
[INFO] [stdout] test school::tests::test_get_best_class ... ok
[INFO] [stdout] test school::tests::test_get_best_class_with_empty_classes ... ok
[INFO] [stdout] test school::tests::test_class_average ... ok
[INFO] [stdout] test school::tests::test_class_creation ... ok
[INFO] [stdout] test school::tests::test_get_best_class_with_empty_school ... ok
[INFO] [stdout] test school::tests::test_get_best_class_with_multiple_classes ... ok
[INFO] [stdout] test school::tests::test_school_average_grades_with_multiple_students ... ok
[INFO] [stdout] test school::tests::test_school_cloning ... ok
[INFO] [stdout] test school::tests::test_school_creation ... ok
[INFO] [stdout] test school::tests::test_student_cloning ... ok
[INFO] [stdout] test school::tests::test_student_creation ... ok
[INFO] [stdout] test school::tests::test_school_average_grades ... ok
[INFO] [stdout] test school::tests::test_school_average_grades_with_students ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests school_library
[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" "bad29b3cfc99c0a9b6a9ed373033c522e03a99ae0d15b2c561bfb95f05e33bb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bad29b3cfc99c0a9b6a9ed373033c522e03a99ae0d15b2c561bfb95f05e33bb0", kill_on_drop: false }`
[INFO] [stdout] bad29b3cfc99c0a9b6a9ed373033c522e03a99ae0d15b2c561bfb95f05e33bb0