[INFO] cloning repository https://github.com/brahmlower/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/brahmlower/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrahmlower%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrahmlower%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00a0e3a4c9dc281b03d74bcd8a0a01cbd7e56623
[INFO] checking brahmlower/sudoku-solver against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrahmlower%2Fsudoku-solver" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/brahmlower/sudoku-solver
[INFO] finished tweaking git repo https://github.com/brahmlower/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/brahmlower/sudoku-solver written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brahmlower/sudoku-solver on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brahmlower/sudoku-solver 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 712ded6d79f9b2e03f1716d0813744e43c7ad99b9fd273da7cadebf87a678215
[INFO] running `Command { std: "docker" "start" "-a" "712ded6d79f9b2e03f1716d0813744e43c7ad99b9fd273da7cadebf87a678215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "712ded6d79f9b2e03f1716d0813744e43c7ad99b9fd273da7cadebf87a678215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "712ded6d79f9b2e03f1716d0813744e43c7ad99b9fd273da7cadebf87a678215", kill_on_drop: false }`
[INFO] [stdout] 712ded6d79f9b2e03f1716d0813744e43c7ad99b9fd273da7cadebf87a678215
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef13480121ae395553194997311445de8693f9f53c2f17089e2ee808982adcca
[INFO] running `Command { std: "docker" "start" "-a" "ef13480121ae395553194997311445de8693f9f53c2f17089e2ee808982adcca", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `collections::HashSet`
[INFO] [stdout]  --> src/cell.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{fmt, collections::HashSet};
[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 import: `crate::diff::ScalarDiffFragment`
[INFO] [stdout]  --> src/cell.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::diff::ScalarDiffFragment;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::diff::Diff`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::diff::Diff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashSet`
[INFO] [stdout]  --> src/cell.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{fmt, collections::HashSet};
[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 import: `crate::diff::ScalarDiffFragment`
[INFO] [stdout]  --> src/cell.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::diff::ScalarDiffFragment;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::diff::Diff`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::diff::Diff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Board` is never constructed
[INFO] [stdout]   --> src/main.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Board {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cells_to_values` is never used
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn cells_to_values(cells: Vec<&Cell>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/main.rs:35:8
[INFO] [stdout]     |
[INFO] [stdout]  34 | impl Board {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout]  35 |     fn new(cells: [Cell; 81]) -> Board {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  39 |     fn render(&self) -> String {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  54 |     fn render_row(&self, row_num: usize) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  69 |     fn get_cells(&self, indexes: &Vec<BoardIndex>) -> Vec<&Cell> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  76 |     pub fn get_cell(&self, index: &BoardIndex) -> &Cell {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |     pub fn get_cell_mut(&mut self, index: &BoardIndex) -> &mut Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  84 |     pub fn collapse_cell(&mut self, index: &BoardIndex) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn unsolved_indexes(&self) -> Vec<BoardIndex> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `c` is never used
[INFO] [stdout]    --> src/main.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn c(index: u8, value: u8) -> Cell {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `i` is never used
[INFO] [stdout]    --> src/main.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn i(index: u8, value: u8) -> Cell {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BoardLocation` is never used
[INFO] [stdout]   --> src/board_index.rs:37:11
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub trait BoardLocation {
[INFO] [stdout]    |           ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `changed_value` and `added_options` are never used
[INFO] [stdout]   --> src/cell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl CellFragmentBuilder {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn changed_value(&mut self, old: Option<u8>, new: Option<u8>) -> &mut CellFragmentBuilder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn added_options(&mut self, added: Vec<u8>) -> &mut CellFragmentBuilder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/cell.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct Cell {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 85 |     pub index: BoardIndex,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Cell` 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 `new` is never used
[INFO] [stdout]    --> src/diff.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl <T> ScalarDiffFragment<T> {
[INFO] [stdout]     | ------------------------------ associated function in this implementation
[INFO] [stdout] 100 |     pub fn new(before: T, after: T) -> ScalarDiffFragment<T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ScalarDiff` is never used
[INFO] [stdout]    --> src/diff.rs:113:7
[INFO] [stdout]     |
[INFO] [stdout] 113 | trait ScalarDiff: Sized + PatchFragment {
[INFO] [stdout]     |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Board` is never constructed
[INFO] [stdout]   --> src/main.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Board {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cells_to_values` is never used
[INFO] [stdout]   --> src/main.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn cells_to_values(cells: Vec<&Cell>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/main.rs:35:8
[INFO] [stdout]     |
[INFO] [stdout]  34 | impl Board {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout]  35 |     fn new(cells: [Cell; 81]) -> Board {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  39 |     fn render(&self) -> String {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  54 |     fn render_row(&self, row_num: usize) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  69 |     fn get_cells(&self, indexes: &Vec<BoardIndex>) -> Vec<&Cell> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  76 |     pub fn get_cell(&self, index: &BoardIndex) -> &Cell {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |     pub fn get_cell_mut(&mut self, index: &BoardIndex) -> &mut Cell {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  84 |     pub fn collapse_cell(&mut self, index: &BoardIndex) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn unsolved_indexes(&self) -> Vec<BoardIndex> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `c` is never used
[INFO] [stdout]    --> src/main.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn c(index: u8, value: u8) -> Cell {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `i` is never used
[INFO] [stdout]    --> src/main.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn i(index: u8, value: u8) -> Cell {
[INFO] [stdout]     |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `index_above`, `index_below`, `index_left`, `index_right`, and `entangled_indexes` are never used
[INFO] [stdout]    --> src/board_index.rs:57:8
[INFO] [stdout]     |
[INFO] [stdout]  37 | pub trait BoardLocation {
[INFO] [stdout]     |           ------------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout]  57 |     fn index_above(&self) -> Option<BoardIndex> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  70 |     fn index_below(&self) -> Option<BoardIndex> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  83 |     fn index_left(&self) -> Option<BoardIndex> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  96 |     fn index_right(&self) -> Option<BoardIndex> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |     fn entangled_indexes(&self) -> Vec<BoardIndex> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `changed_value` and `added_options` are never used
[INFO] [stdout]   --> src/cell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl CellFragmentBuilder {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn changed_value(&mut self, old: Option<u8>, new: Option<u8>) -> &mut CellFragmentBuilder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn added_options(&mut self, added: Vec<u8>) -> &mut CellFragmentBuilder {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/cell.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct Cell {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 85 |     pub index: BoardIndex,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Cell` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.85s
[INFO] running `Command { std: "docker" "inspect" "ef13480121ae395553194997311445de8693f9f53c2f17089e2ee808982adcca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef13480121ae395553194997311445de8693f9f53c2f17089e2ee808982adcca", kill_on_drop: false }`
[INFO] [stdout] ef13480121ae395553194997311445de8693f9f53c2f17089e2ee808982adcca
