[INFO] fetching crate muto 0.1.0...
[INFO] testing muto-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate muto 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate muto 0.1.0
[INFO] finished tweaking crates.io crate muto 0.1.0
[INFO] tweaked toml for crates.io crate muto 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate muto 0.1.0 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] crate crates.io crate muto 0.1.0 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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 9281f68a10a66921f0c400cabbb3f0ee242085e42e382ed035bd02bb103b0678
[INFO] running `Command { std: "docker" "start" "-a" "9281f68a10a66921f0c400cabbb3f0ee242085e42e382ed035bd02bb103b0678", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9281f68a10a66921f0c400cabbb3f0ee242085e42e382ed035bd02bb103b0678", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9281f68a10a66921f0c400cabbb3f0ee242085e42e382ed035bd02bb103b0678", kill_on_drop: false }`
[INFO] [stdout] 9281f68a10a66921f0c400cabbb3f0ee242085e42e382ed035bd02bb103b0678
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e07c637e68186bcfed00a3d8ddb34111ef075c0f2c7868c1e43a31aaafc774b1
[INFO] running `Command { std: "docker" "start" "-a" "e07c637e68186bcfed00a3d8ddb34111ef075c0f2c7868c1e43a31aaafc774b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling muto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::take`
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::mem::take;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `prev_task` and `next_task` are never read
[INFO] [stdout]    --> src/lib.rs:236:2
[INFO] [stdout]     |
[INFO] [stdout] 235 | struct InsertionData {
[INFO] [stdout]     |        ------------- fields in this struct
[INFO] [stdout] 236 |     prev_task: Task,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 237 |     next_task: Task,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InsertionData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solutions`
[INFO] [stdout]   --> src/main.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let solutions = muto.solve();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solutions`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "e07c637e68186bcfed00a3d8ddb34111ef075c0f2c7868c1e43a31aaafc774b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e07c637e68186bcfed00a3d8ddb34111ef075c0f2c7868c1e43a31aaafc774b1", kill_on_drop: false }`
[INFO] [stdout] e07c637e68186bcfed00a3d8ddb34111ef075c0f2c7868c1e43a31aaafc774b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e8b453a20da406efe68560865d55fb19aa10e8beeb785373d17b9c8bf25c9fe7
[INFO] running `Command { std: "docker" "start" "-a" "e8b453a20da406efe68560865d55fb19aa10e8beeb785373d17b9c8bf25c9fe7", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `std::mem::take`
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::mem::take;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `prev_task` and `next_task` are never read
[INFO] [stdout]    --> src/lib.rs:236:2
[INFO] [stdout]     |
[INFO] [stdout] 235 | struct InsertionData {
[INFO] [stdout]     |        ------------- fields in this struct
[INFO] [stdout] 236 |     prev_task: Task,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 237 |     next_task: Task,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InsertionData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling muto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::take`
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::mem::take;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solutions`
[INFO] [stdout]   --> src/main.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let solutions = muto.solve();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solutions`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `prev_task` and `next_task` are never read
[INFO] [stdout]    --> src/lib.rs:236:2
[INFO] [stdout]     |
[INFO] [stdout] 235 | struct InsertionData {
[INFO] [stdout]     |        ------------- fields in this struct
[INFO] [stdout] 236 |     prev_task: Task,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 237 |     next_task: Task,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InsertionData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "e8b453a20da406efe68560865d55fb19aa10e8beeb785373d17b9c8bf25c9fe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8b453a20da406efe68560865d55fb19aa10e8beeb785373d17b9c8bf25c9fe7", kill_on_drop: false }`
[INFO] [stdout] e8b453a20da406efe68560865d55fb19aa10e8beeb785373d17b9c8bf25c9fe7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 5c5d37ae49950b8e0f8dc029300fa6716c9031b358c86fa0004d346df5bd8c38
[INFO] running `Command { std: "docker" "start" "-a" "5c5d37ae49950b8e0f8dc029300fa6716c9031b358c86fa0004d346df5bd8c38", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::mem::take`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::mem::take;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `prev_task` and `next_task` are never read
[INFO] [stderr]    --> src/lib.rs:236:2
[INFO] [stderr]     |
[INFO] [stderr] 235 | struct InsertionData {
[INFO] [stderr]     |        ------------- fields in this struct
[INFO] [stderr] 236 |     prev_task: Task,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 237 |     next_task: Task,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `InsertionData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `muto` (lib) generated 2 warnings (run `cargo fix --lib -p muto` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `solutions`
[INFO] [stderr]   --> src/main.rs:38:6
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let solutions = muto.solve();
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solutions`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `muto` (bin "muto" test) generated 1 warning (run `cargo fix --bin "muto" -p muto --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `muto` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/muto-c69cb3ad6f5fa451)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... 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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/muto-fb1c8cf53a3ae0b7)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests muto
[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] [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" "5c5d37ae49950b8e0f8dc029300fa6716c9031b358c86fa0004d346df5bd8c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c5d37ae49950b8e0f8dc029300fa6716c9031b358c86fa0004d346df5bd8c38", kill_on_drop: false }`
[INFO] [stdout] 5c5d37ae49950b8e0f8dc029300fa6716c9031b358c86fa0004d346df5bd8c38