[INFO] fetching crate flat_rbtree 0.2.3...
[INFO] testing flat_rbtree-0.2.3 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate flat_rbtree 0.2.3 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate flat_rbtree 0.2.3
[INFO] finished tweaking crates.io crate flat_rbtree 0.2.3
[INFO] tweaked toml for crates.io crate flat_rbtree 0.2.3 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flat_rbtree 0.2.3 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flat_rbtree 0.2.3 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 842afe8efdaaa57f195c64652f7b0bcedd3d6b6e9a8a030f0061342ab56645ae
[INFO] running `Command { std: "docker" "start" "-a" "842afe8efdaaa57f195c64652f7b0bcedd3d6b6e9a8a030f0061342ab56645ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "842afe8efdaaa57f195c64652f7b0bcedd3d6b6e9a8a030f0061342ab56645ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "842afe8efdaaa57f195c64652f7b0bcedd3d6b6e9a8a030f0061342ab56645ae", kill_on_drop: false }`
[INFO] [stdout] 842afe8efdaaa57f195c64652f7b0bcedd3d6b6e9a8a030f0061342ab56645ae
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fffa2a95242a8fd6ec61be00db7f12e76971a1cc62cfed6f4f9e590e5c407ddc
[INFO] running `Command { std: "docker" "start" "-a" "fffa2a95242a8fd6ec61be00db7f12e76971a1cc62cfed6f4f9e590e5c407ddc", kill_on_drop: false }`
[INFO] [stderr]    Compiling flat_rbtree v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "fffa2a95242a8fd6ec61be00db7f12e76971a1cc62cfed6f4f9e590e5c407ddc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fffa2a95242a8fd6ec61be00db7f12e76971a1cc62cfed6f4f9e590e5c407ddc", kill_on_drop: false }`
[INFO] [stdout] fffa2a95242a8fd6ec61be00db7f12e76971a1cc62cfed6f4f9e590e5c407ddc
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a184464be4f1e94b8ba4446dc610cce786cacb5dadb413acda885cd26c3696d
[INFO] running `Command { std: "docker" "start" "-a" "0a184464be4f1e94b8ba4446dc610cce786cacb5dadb413acda885cd26c3696d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling half v2.6.0
[INFO] [stderr]    Compiling plotters-backend v0.3.7
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling clap_builder v4.5.40
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling oorandom v11.1.5
[INFO] [stderr]    Compiling rbtree v0.1.7
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling criterion-plot v0.5.0
[INFO] [stderr]    Compiling plotters-svg v0.3.7
[INFO] [stderr]    Compiling ciborium-ll v0.2.2
[INFO] [stderr]    Compiling plotters v0.3.7
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.1
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling clap v4.5.40
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.6.0
[INFO] [stderr]    Compiling flat_rbtree v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 27.52s
[INFO] running `Command { std: "docker" "inspect" "0a184464be4f1e94b8ba4446dc610cce786cacb5dadb413acda885cd26c3696d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a184464be4f1e94b8ba4446dc610cce786cacb5dadb413acda885cd26c3696d", kill_on_drop: false }`
[INFO] [stdout] 0a184464be4f1e94b8ba4446dc610cce786cacb5dadb413acda885cd26c3696d
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] eb69ea3b371aa2ebcf22fe524531094bd2182d81a01a7dcae97cb31eaa448459
[INFO] running `Command { std: "docker" "start" "-a" "eb69ea3b371aa2ebcf22fe524531094bd2182d81a01a7dcae97cb31eaa448459", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/flat_rbtree-ffcd96319bd65781)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test tests::test_balanced_after_removal ... ok
[INFO] [stdout] test tests::test_insert_and_search ... ok
[INFO] [stdout] test tests::test_iter ... ok
[INFO] [stdout] test tests::test_min_and_max ... ok
[INFO] [stdout] test tests::test_reinsert_removed_key ... ok
[INFO] [stdout] test tests::test_random_insertion_and_removal ... ok
[INFO] [stdout] test tests::test_multiple_insert_remove ... ok
[INFO] [stdout] test tests::test_descending_inserts_then_remove_half ... ok
[INFO] [stdout] test tests::test_remove_leaf_node ... ok
[INFO] [stdout] test tests::test_example ... ok
[INFO] [stdout] test tests::test_remove_node_with_one_child ... ok
[INFO] [stdout] test tests::test_utils ... ok
[INFO] [stdout] test tests::test_remove_node_with_two_children ... ok
[INFO] [stdout] test tests::test_large_insertion_and_removal ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    Doc-tests flat_rbtree
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "eb69ea3b371aa2ebcf22fe524531094bd2182d81a01a7dcae97cb31eaa448459", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb69ea3b371aa2ebcf22fe524531094bd2182d81a01a7dcae97cb31eaa448459", kill_on_drop: false }`
[INFO] [stdout] eb69ea3b371aa2ebcf22fe524531094bd2182d81a01a7dcae97cb31eaa448459