[INFO] cloning repository https://github.com/helmutschneider/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/helmutschneider/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelmutschneider%2Fsudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelmutschneider%2Fsudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 222ed1ee53c369d2c9e3e9adf949892041d483a0
[INFO] checking helmutschneider/sudoku against master#d93f678fa55842cccd2f091deccd93e9494b3764 for pr-138844
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelmutschneider%2Fsudoku" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/helmutschneider/sudoku on toolchain d93f678fa55842cccd2f091deccd93e9494b3764
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/helmutschneider/sudoku
[INFO] finished tweaking git repo https://github.com/helmutschneider/sudoku
[INFO] tweaked toml for git repo https://github.com/helmutschneider/sudoku written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/helmutschneider/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" "+d93f678fa55842cccd2f091deccd93e9494b3764" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08bc09644b0afa688bd5901f497e2cddc8b94d8811b2f479e8b19a5336af60ed
[INFO] running `Command { std: "docker" "start" "-a" "08bc09644b0afa688bd5901f497e2cddc8b94d8811b2f479e8b19a5336af60ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08bc09644b0afa688bd5901f497e2cddc8b94d8811b2f479e8b19a5336af60ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08bc09644b0afa688bd5901f497e2cddc8b94d8811b2f479e8b19a5336af60ed", kill_on_drop: false }`
[INFO] [stdout] 08bc09644b0afa688bd5901f497e2cddc8b94d8811b2f479e8b19a5336af60ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38aea23d8bfb0c20ffe16abfa5ba92017e51e0f9f68376491565871c9f11da86
[INFO] running `Command { std: "docker" "start" "-a" "38aea23d8bfb0c20ffe16abfa5ba92017e51e0f9f68376491565871c9f11da86", kill_on_drop: false }`
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/board.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/board.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::digit::Digit`
[INFO] [stdout]  --> src/index.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::digit::Digit;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CellIndex`, `ColumnIndex`, and `RowIndex`
[INFO] [stdout]  --> src/solver.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::index::{CellIndex, ColumnIndex, RowIndex};
[INFO] [stdout]   |                    ^^^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `origin` is never read
[INFO] [stdout]   --> src/cell.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct CellList<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 26 |     pub cells: [Cell; 9],
[INFO] [stdout] 27 |     pub origin: T,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CellList` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `origin` is never read
[INFO] [stdout]   --> src/cell.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct CellList<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 26 |     pub cells: [Cell; 9],
[INFO] [stdout] 27 |     pub origin: T,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CellList` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "38aea23d8bfb0c20ffe16abfa5ba92017e51e0f9f68376491565871c9f11da86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38aea23d8bfb0c20ffe16abfa5ba92017e51e0f9f68376491565871c9f11da86", kill_on_drop: false }`
[INFO] [stdout] 38aea23d8bfb0c20ffe16abfa5ba92017e51e0f9f68376491565871c9f11da86