[INFO] cloning repository https://github.com/m-squared96/sudoku-solver [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/m-squared96/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-squared96%2Fsudoku-solver", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-squared96%2Fsudoku-solver'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 4360ead5e4fef6703cf47734ccd01c25220c75a1 [INFO] checking m-squared96/sudoku-solver against master#de32266a1780aa4ef748ce7f6200a1554fad0aca for pr-75585 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-squared96%2Fsudoku-solver" "/workspace/builds/worker-3/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/m-squared96/sudoku-solver on toolchain de32266a1780aa4ef748ce7f6200a1554fad0aca [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/m-squared96/sudoku-solver [INFO] finished tweaking git repo https://github.com/m-squared96/sudoku-solver [INFO] tweaked toml for git repo https://github.com/m-squared96/sudoku-solver written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/m-squared96/sudoku-solver already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 29be48f6e7184b70b7ee822fe02a54ac6fc1ac0132adefe50aa5760af87878b2 [INFO] running `Command { std: "docker" "start" "-a" "29be48f6e7184b70b7ee822fe02a54ac6fc1ac0132adefe50aa5760af87878b2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "29be48f6e7184b70b7ee822fe02a54ac6fc1ac0132adefe50aa5760af87878b2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "29be48f6e7184b70b7ee822fe02a54ac6fc1ac0132adefe50aa5760af87878b2", kill_on_drop: false }` [INFO] [stdout] 29be48f6e7184b70b7ee822fe02a54ac6fc1ac0132adefe50aa5760af87878b2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+de32266a1780aa4ef748ce7f6200a1554fad0aca" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] ccc6046dc5a3f69c4cafc9852271d07e0903113f9e1bd57d5d0caa29acca92c7 [INFO] running `Command { std: "docker" "start" "-a" "ccc6046dc5a3f69c4cafc9852271d07e0903113f9e1bd57d5d0caa29acca92c7", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.60 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking sudoku_solver_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: value assigned to `filepath` is never read [INFO] [stdout] --> src/main.rs:377:9 [INFO] [stdout] | [INFO] [stdout] 377 | let mut filepath: Option = Some(String::new()); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `command_flag` is never read [INFO] [stdout] --> src/main.rs:535:9 [INFO] [stdout] | [INFO] [stdout] 535 | let mut command_flag = String::new(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `board` is never read [INFO] [stdout] --> src/main.rs:544:9 [INFO] [stdout] | [INFO] [stdout] 544 | let mut board: Option>> = Some(Vec::new()); [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:464:9 [INFO] [stdout] | [INFO] [stdout] 464 | let mut output_file = fs::File::create(filepath.as_str()).unwrap(); [INFO] [stdout] | ----^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `output_puzzle` [INFO] [stdout] --> src/main.rs:449:4 [INFO] [stdout] | [INFO] [stdout] 449 | fn output_puzzle(args: Vec) -> Vec> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:475:9 [INFO] [stdout] | [INFO] [stdout] 475 | write!(&mut writer, "{}", line_string); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `filepath` is never read [INFO] [stdout] --> src/main.rs:377:9 [INFO] [stdout] | [INFO] [stdout] 377 | let mut filepath: Option = Some(String::new()); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `command_flag` is never read [INFO] [stdout] --> src/main.rs:535:9 [INFO] [stdout] | [INFO] [stdout] 535 | let mut command_flag = String::new(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `board` is never read [INFO] [stdout] --> src/main.rs:544:9 [INFO] [stdout] | [INFO] [stdout] 544 | let mut board: Option>> = Some(Vec::new()); [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:464:9 [INFO] [stdout] | [INFO] [stdout] 464 | let mut output_file = fs::File::create(filepath.as_str()).unwrap(); [INFO] [stdout] | ----^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `output_puzzle` [INFO] [stdout] --> src/main.rs:449:4 [INFO] [stdout] | [INFO] [stdout] 449 | fn output_puzzle(args: Vec) -> Vec> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:475:9 [INFO] [stdout] | [INFO] [stdout] 475 | write!(&mut writer, "{}", line_string); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 3.98s [INFO] running `Command { std: "docker" "inspect" "ccc6046dc5a3f69c4cafc9852271d07e0903113f9e1bd57d5d0caa29acca92c7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ccc6046dc5a3f69c4cafc9852271d07e0903113f9e1bd57d5d0caa29acca92c7", kill_on_drop: false }` [INFO] [stdout] ccc6046dc5a3f69c4cafc9852271d07e0903113f9e1bd57d5d0caa29acca92c7