[INFO] cloning repository https://github.com/Anfauglith/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Anfauglith/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfauglith%2Fsudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfauglith%2Fsudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 198a8b8f2a95bbbc42d9691a5c8a017d1b397c46
[INFO] testing Anfauglith/sudoku against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfauglith%2Fsudoku" "/workspace/builds/worker-52/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-52/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anfauglith/sudoku on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-52/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" "+722e1797249a965b6335aebd65d777f917e498f1" "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-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08e90de0fb1289a114110a1d99347862ae4b4a9936c69c2f4b3e8c692137802c
[INFO] running `Command { std: "docker" "start" "-a" "08e90de0fb1289a114110a1d99347862ae4b4a9936c69c2f4b3e8c692137802c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08e90de0fb1289a114110a1d99347862ae4b4a9936c69c2f4b3e8c692137802c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08e90de0fb1289a114110a1d99347862ae4b4a9936c69c2f4b3e8c692137802c", kill_on_drop: false }`
[INFO] [stdout] 08e90de0fb1289a114110a1d99347862ae4b4a9936c69c2f4b3e8c692137802c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd08207a7bac034b32e2c8203792e38ed95551aca95e4e896ae1972c028d72ed
[INFO] running `Command { std: "docker" "start" "-a" "dd08207a7bac034b32e2c8203792e38ed95551aca95e4e896ae1972c028d72ed", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.14s
[INFO] running `Command { std: "docker" "inspect" "dd08207a7bac034b32e2c8203792e38ed95551aca95e4e896ae1972c028d72ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd08207a7bac034b32e2c8203792e38ed95551aca95e4e896ae1972c028d72ed", kill_on_drop: false }`
[INFO] [stdout] dd08207a7bac034b32e2c8203792e38ed95551aca95e4e896ae1972c028d72ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba97900d81054a4879eb81a1e36951c5f3f513981acedcd9d768869f983b3611
[INFO] running `Command { std: "docker" "start" "-a" "ba97900d81054a4879eb81a1e36951c5f3f513981acedcd9d768869f983b3611", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[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 test [unoptimized + debuginfo] target(s) in 3.43s
[INFO] running `Command { std: "docker" "inspect" "ba97900d81054a4879eb81a1e36951c5f3f513981acedcd9d768869f983b3611", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba97900d81054a4879eb81a1e36951c5f3f513981acedcd9d768869f983b3611", kill_on_drop: false }`
[INFO] [stdout] ba97900d81054a4879eb81a1e36951c5f3f513981acedcd9d768869f983b3611
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 276b8147401eede5316c2e03156607983b9ae45bd726212b16b2e4e231e1e187
[INFO] running `Command { std: "docker" "start" "-a" "276b8147401eede5316c2e03156607983b9ae45bd726212b16b2e4e231e1e187", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `Field`
[INFO] [stderr]  --> src/field.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Field {
[INFO] [stderr]   |            ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_solved`
[INFO] [stderr]   --> src/field.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn is_solved(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sudoku` (bin "sudoku" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku-3ee6960d39c169f6)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test field::tests::cell_fixing ... ok
[INFO] [stdout] test field::tests::removing_candidates_and_solving ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "276b8147401eede5316c2e03156607983b9ae45bd726212b16b2e4e231e1e187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "276b8147401eede5316c2e03156607983b9ae45bd726212b16b2e4e231e1e187", kill_on_drop: false }`
[INFO] [stdout] 276b8147401eede5316c2e03156607983b9ae45bd726212b16b2e4e231e1e187