[INFO] cloning repository https://github.com/Trequetrum/rust-sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Trequetrum/rust-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrequetrum%2Frust-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrequetrum%2Frust-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d9423fb69c87705264f2e4daf76d3cad6707352
[INFO] checking Trequetrum/rust-sudoku/9d9423fb69c87705264f2e4daf76d3cad6707352 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrequetrum%2Frust-sudoku" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Trequetrum/rust-sudoku on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Trequetrum/rust-sudoku
[INFO] finished tweaking git repo https://github.com/Trequetrum/rust-sudoku
[INFO] tweaked toml for git repo https://github.com/Trequetrum/rust-sudoku written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Trequetrum/rust-sudoku 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d112daacf0c8b97864fe1b0ada69719d5e3a16fd8c958651a01ca12e5f76ea3a
[INFO] running `Command { std: "docker" "start" "-a" "d112daacf0c8b97864fe1b0ada69719d5e3a16fd8c958651a01ca12e5f76ea3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d112daacf0c8b97864fe1b0ada69719d5e3a16fd8c958651a01ca12e5f76ea3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d112daacf0c8b97864fe1b0ada69719d5e3a16fd8c958651a01ca12e5f76ea3a", kill_on_drop: false }`
[INFO] [stdout] d112daacf0c8b97864fe1b0ada69719d5e3a16fd8c958651a01ca12e5f76ea3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3f93ce4340e2e50ba7f3afdca19ec9312571d4f91ed5efa60bcf61bc3156b5f
[INFO] running `Command { std: "docker" "start" "-a" "c3f93ce4340e2e50ba7f3afdca19ec9312571d4f91ed5efa60bcf61bc3156b5f", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.65
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/n_tuple_strategy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow::Result`
[INFO] [stdout]  --> src/n_tuple_strategy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use anyhow::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pick_one` is never used
[INFO] [stdout]  --> src/cell.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn pick_one(cell: u32) -> u32 {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `style` and `sub` are never read
[INFO] [stdout]   --> src/group.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Group {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 14 |     pub style: GroupStyle,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 15 |     pub sub: u32,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Group` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `meta_style` is never used
[INFO] [stdout]   --> src/group.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Group {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 20 |     pub fn meta_style(style: GroupStyle) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dbg_display_board` is never used
[INFO] [stdout]   --> src/sudoku_utils.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn dbg_display_board(brd: ArrayVec<u32, 81>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pick_one` is never used
[INFO] [stdout]  --> src/cell.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn pick_one(cell: u32) -> u32 {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `style` and `sub` are never read
[INFO] [stdout]   --> src/group.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Group {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 14 |     pub style: GroupStyle,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 15 |     pub sub: u32,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Group` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `meta_style` is never used
[INFO] [stdout]   --> src/group.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Group {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 20 |     pub fn meta_style(style: GroupStyle) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dbg_display_board` is never used
[INFO] [stdout]   --> src/sudoku_utils.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn dbg_display_board(brd: ArrayVec<u32, 81>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "c3f93ce4340e2e50ba7f3afdca19ec9312571d4f91ed5efa60bcf61bc3156b5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3f93ce4340e2e50ba7f3afdca19ec9312571d4f91ed5efa60bcf61bc3156b5f", kill_on_drop: false }`
[INFO] [stdout] c3f93ce4340e2e50ba7f3afdca19ec9312571d4f91ed5efa60bcf61bc3156b5f