[INFO] updating cached repository https://github.com/Anfauglith/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 198a8b8f2a95bbbc42d9691a5c8a017d1b397c46
[INFO] checking Anfauglith/sudoku against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfauglith%2Fsudoku" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anfauglith/sudoku on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Anfauglith/sudoku
[INFO] finished tweaking git repo https://github.com/Anfauglith/sudoku
[INFO] tweaked toml for git repo https://github.com/Anfauglith/sudoku written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Anfauglith/sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "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] 0b96134f5d4f22d21d563267785c97892b99cec8c6d83b6f6a251a2c7d0e54ba
[INFO] running `Command { std: "docker" "start" "-a" "0b96134f5d4f22d21d563267785c97892b99cec8c6d83b6f6a251a2c7d0e54ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b96134f5d4f22d21d563267785c97892b99cec8c6d83b6f6a251a2c7d0e54ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b96134f5d4f22d21d563267785c97892b99cec8c6d83b6f6a251a2c7d0e54ba", kill_on_drop: false }`
[INFO] [stdout] 0b96134f5d4f22d21d563267785c97892b99cec8c6d83b6f6a251a2c7d0e54ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e68c1a7e323b84860c419db1fb8fb2be246b7432ef8620d11669facbe247fa0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8e68c1a7e323b84860c419db1fb8fb2be246b7432ef8620d11669facbe247fa0", kill_on_drop: false }`
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `CANDIDATE_MASK`
[INFO] [stdout]  --> src/field.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | const CANDIDATE_MASK: u16 = 0b0000_0011_1111_1110; // 0x03FE
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Field`
[INFO] [stdout]  --> src/field.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Field {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cell`
[INFO] [stdout]  --> src/field.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Cell {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty_cell`
[INFO] [stdout]   --> src/field.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn empty_cell() -> Cell {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fixed_cell`
[INFO] [stdout]   --> src/field.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn fixed_cell(digit: u8) -> Cell {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_solved`
[INFO] [stdout]   --> src/field.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_fixed`
[INFO] [stdout]   --> src/field.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn is_fixed(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_digit`
[INFO] [stdout]   --> src/field.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn get_digit(&self) -> Option<u8> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fix`
[INFO] [stdout]   --> src/field.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn fix(&mut self) -> bool {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_to`
[INFO] [stdout]   --> src/field.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn set_to(&mut self, digit: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fix_to`
[INFO] [stdout]   --> src/field.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn fix_to(&mut self, digit: u8) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_candidate`
[INFO] [stdout]   --> src/field.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn has_candidate(&self, candidate: u8) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_candidates`
[INFO] [stdout]   --> src/field.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn get_candidates(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_candidate_vector`
[INFO] [stdout]   --> src/field.rs:81:12
[INFO] [stdout]    |
[INFO] [stdout] 81 |     pub fn get_candidate_vector(&self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_candidate`
[INFO] [stdout]   --> src/field.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn remove_candidate(&mut self, candidate: u8) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_candidates`
[INFO] [stdout]   --> src/field.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn remove_candidates(&mut self, candidates: Vec<u8>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_single_candidate`
[INFO] [stdout]    --> src/field.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn has_single_candidate(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_naked_single`
[INFO] [stdout]    --> src/field.rs:106:12
[INFO] [stdout]     |
[INFO] [stdout] 106 |     pub fn get_naked_single(&self) -> Option<u8> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_solve`
[INFO] [stdout]    --> src/field.rs:119:12
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn try_solve(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Field`
[INFO] [stdout]  --> src/field.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Field {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_solved`
[INFO] [stdout]   --> src/field.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn is_solved(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "8e68c1a7e323b84860c419db1fb8fb2be246b7432ef8620d11669facbe247fa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e68c1a7e323b84860c419db1fb8fb2be246b7432ef8620d11669facbe247fa0", kill_on_drop: false }`
[INFO] [stdout] 8e68c1a7e323b84860c419db1fb8fb2be246b7432ef8620d11669facbe247fa0