[INFO] fetching crate soku 0.1.1... [INFO] testing soku-0.1.1 against beta-2025-10-28 for beta-1.92-2 [INFO] extracting crate soku 0.1.1 into /workspace/builds/worker-2-tc2/source [INFO] started tweaking crates.io crate soku 0.1.1 [INFO] finished tweaking crates.io crate soku 0.1.1 [INFO] tweaked toml for crates.io crate soku 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate soku 0.1.1 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 soku 0.1.1 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] 32849c8544f91007ab9bfd561b4607da895a3a26697c34b245d376e909b9c595 [INFO] running `Command { std: "docker" "start" "-a" "32849c8544f91007ab9bfd561b4607da895a3a26697c34b245d376e909b9c595", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "32849c8544f91007ab9bfd561b4607da895a3a26697c34b245d376e909b9c595", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "32849c8544f91007ab9bfd561b4607da895a3a26697c34b245d376e909b9c595", kill_on_drop: false }` [INFO] [stdout] 32849c8544f91007ab9bfd561b4607da895a3a26697c34b245d376e909b9c595 [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] d2b57401dad8f09f8d283930ab396f3c86c48f0c8617d9d2d7f9e360b852548f [INFO] running `Command { std: "docker" "start" "-a" "d2b57401dad8f09f8d283930ab396f3c86c48f0c8617d9d2d7f9e360b852548f", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.53 [INFO] [stderr] Compiling quote v1.0.26 [INFO] [stderr] Compiling unicode-ident v1.0.8 [INFO] [stderr] Compiling libc v0.2.140 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling ppv-lite86 v0.2.17 [INFO] [stderr] Compiling thiserror v1.0.40 [INFO] [stderr] Compiling getrandom v0.2.8 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling syn v2.0.8 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling thiserror-impl v1.0.40 [INFO] [stderr] Compiling derive_more v0.99.17 [INFO] [stderr] Compiling soku v0.1.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/sudoku.rs:645:5 [INFO] [stdout] | [INFO] [stdout] 645 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sudoku.rs:142:13 [INFO] [stdout] | [INFO] [stdout] 142 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sudoku.rs:153:13 [INFO] [stdout] | [INFO] [stdout] 153 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.36s [INFO] running `Command { std: "docker" "inspect" "d2b57401dad8f09f8d283930ab396f3c86c48f0c8617d9d2d7f9e360b852548f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d2b57401dad8f09f8d283930ab396f3c86c48f0c8617d9d2d7f9e360b852548f", kill_on_drop: false }` [INFO] [stdout] d2b57401dad8f09f8d283930ab396f3c86c48f0c8617d9d2d7f9e360b852548f [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] 31c3ae24d289b06132df180c86d94596ad2fc90c1ae4b830798efc499fe31b92 [INFO] running `Command { std: "docker" "start" "-a" "31c3ae24d289b06132df180c86d94596ad2fc90c1ae4b830798efc499fe31b92", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling libc v0.2.140 [INFO] [stderr] Compiling futures-core v0.3.27 [INFO] [stderr] Compiling futures-task v0.3.27 [INFO] [stderr] Compiling futures-channel v0.3.27 [INFO] [stderr] Compiling futures-util v0.3.27 [INFO] [stderr] Compiling futures-sink v0.3.27 [INFO] [stderr] Compiling futures-io v0.3.27 [INFO] [stderr] Compiling tokio v1.26.0 [INFO] [stderr] Compiling getrandom v0.2.8 [INFO] [stderr] Compiling num_cpus v1.15.0 [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 futures-macro v0.3.27 [INFO] [stderr] Compiling tokio-macros v1.8.2 [INFO] [stderr] Compiling derive_more v0.99.17 [INFO] [stderr] Compiling soku v0.1.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/sudoku.rs:645:5 [INFO] [stdout] | [INFO] [stdout] 645 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sudoku.rs:142:13 [INFO] [stdout] | [INFO] [stdout] 142 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sudoku.rs:153:13 [INFO] [stdout] | [INFO] [stdout] 153 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling futures-executor v0.3.27 [INFO] [stderr] Compiling futures v0.3.27 [INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/sudoku.rs:645:5 [INFO] [stdout] | [INFO] [stdout] 645 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sudoku.rs:142:13 [INFO] [stdout] | [INFO] [stdout] 142 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sudoku.rs:153:13 [INFO] [stdout] | [INFO] [stdout] 153 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 10.66s [INFO] running `Command { std: "docker" "inspect" "31c3ae24d289b06132df180c86d94596ad2fc90c1ae4b830798efc499fe31b92", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "31c3ae24d289b06132df180c86d94596ad2fc90c1ae4b830798efc499fe31b92", kill_on_drop: false }` [INFO] [stdout] 31c3ae24d289b06132df180c86d94596ad2fc90c1ae4b830798efc499fe31b92 [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] 0d5a38fe8534107ca4ac0c9ead6be2ba345f1256352a789dae735e3cb1741a45 [INFO] running `Command { std: "docker" "start" "-a" "0d5a38fe8534107ca4ac0c9ead6be2ba345f1256352a789dae735e3cb1741a45", kill_on_drop: false }` [INFO] [stderr] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stderr] --> src/sudoku.rs:645:5 [INFO] [stderr] | [INFO] [stderr] 645 | #[must_use] [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stderr] = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions [INFO] [stderr] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/sudoku.rs:142:13 [INFO] [stderr] | [INFO] [stderr] 142 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/sudoku.rs:153:13 [INFO] [stderr] | [INFO] [stderr] 153 | let mut cell = self.cell_mut(i.into_index())?; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: `soku` (lib) generated 3 warnings (run `cargo fix --lib -p soku` to apply 3 suggestions) [INFO] [stderr] warning: `soku` (lib test) generated 3 warnings (3 duplicates) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/soku-6cc2bfdce4db7079) [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] Doc-tests soku [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" "0d5a38fe8534107ca4ac0c9ead6be2ba345f1256352a789dae735e3cb1741a45", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0d5a38fe8534107ca4ac0c9ead6be2ba345f1256352a789dae735e3cb1741a45", kill_on_drop: false }` [INFO] [stdout] 0d5a38fe8534107ca4ac0c9ead6be2ba345f1256352a789dae735e3cb1741a45