[INFO] updating cached repository https://github.com/Anfauglith/sudoku
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 198a8b8f2a95bbbc42d9691a5c8a017d1b397c46
[INFO] testing Anfauglith/sudoku against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfauglith%2Fsudoku" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anfauglith/sudoku on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-10/source/Cargo.toml
[INFO] crate git repo https://github.com/Anfauglith/sudoku already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d1e8f2bf38dcaae2416e054bf5caafa7cc6b567529bbbc1b59f64ea7962fd8fb
[INFO] running `"docker" "start" "-a" "d1e8f2bf38dcaae2416e054bf5caafa7cc6b567529bbbc1b59f64ea7962fd8fb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: constant item is never used: `CANDIDATE_MASK`
[INFO] [stderr]  --> src/field.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | const CANDIDATE_MASK: u16 = 0b0000_0011_1111_1110; // 0x03FE
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[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] warning: struct is never constructed: `Cell`
[INFO] [stderr]  --> src/field.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Cell {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty_cell`
[INFO] [stderr]   --> src/field.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn empty_cell() -> Cell {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fixed_cell`
[INFO] [stderr]   --> src/field.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn fixed_cell(digit: u8) -> Cell {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_solved`
[INFO] [stderr]   --> src/field.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn is_solved(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_fixed`
[INFO] [stderr]   --> src/field.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn is_fixed(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_digit`
[INFO] [stderr]   --> src/field.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn get_digit(&self) -> Option<u8> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fix`
[INFO] [stderr]   --> src/field.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn fix(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_to`
[INFO] [stderr]   --> src/field.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     fn set_to(&mut self, digit: u8) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fix_to`
[INFO] [stderr]   --> src/field.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn fix_to(&mut self, digit: u8) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_candidate`
[INFO] [stderr]   --> src/field.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn has_candidate(&self, candidate: u8) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_candidates`
[INFO] [stderr]   --> src/field.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn get_candidates(&self) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_candidate_vector`
[INFO] [stderr]   --> src/field.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn get_candidate_vector(&self) -> Vec<u8> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_candidate`
[INFO] [stderr]   --> src/field.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn remove_candidate(&mut self, candidate: u8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_candidates`
[INFO] [stderr]   --> src/field.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn remove_candidates(&mut self, candidates: Vec<u8>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `has_single_candidate`
[INFO] [stderr]    --> src/field.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn has_single_candidate(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_naked_single`
[INFO] [stderr]    --> src/field.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn get_naked_single(&self) -> Option<u8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `try_solve`
[INFO] [stderr]    --> src/field.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn try_solve(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "d1e8f2bf38dcaae2416e054bf5caafa7cc6b567529bbbc1b59f64ea7962fd8fb"`
[INFO] running `"docker" "rm" "-f" "d1e8f2bf38dcaae2416e054bf5caafa7cc6b567529bbbc1b59f64ea7962fd8fb"`
[INFO] [stdout] d1e8f2bf38dcaae2416e054bf5caafa7cc6b567529bbbc1b59f64ea7962fd8fb
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8956d12e9c6e457fceaad4dd897b73f5c6c55f5d5b6b09fd1bbe6a16c5df030c
[INFO] running `"docker" "start" "-a" "8956d12e9c6e457fceaad4dd897b73f5c6c55f5d5b6b09fd1bbe6a16c5df030c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[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: method is never used: `is_solved`
[INFO] [stderr]   --> src/field.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn is_solved(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "8956d12e9c6e457fceaad4dd897b73f5c6c55f5d5b6b09fd1bbe6a16c5df030c"`
[INFO] running `"docker" "rm" "-f" "8956d12e9c6e457fceaad4dd897b73f5c6c55f5d5b6b09fd1bbe6a16c5df030c"`
[INFO] [stdout] 8956d12e9c6e457fceaad4dd897b73f5c6c55f5d5b6b09fd1bbe6a16c5df030c
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 34f90f078deb96af78a0e48c94ac625ed9efd9ac1cfdd937430a2689fdb815fc
[INFO] running `"docker" "start" "-a" "34f90f078deb96af78a0e48c94ac625ed9efd9ac1cfdd937430a2689fdb815fc"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[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: method is never used: `is_solved`
[INFO] [stderr]   --> src/field.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn is_solved(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sudoku-a7b06584d33e6e28
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test field::tests::removing_candidates_and_solving ... ok
[INFO] [stdout] test field::tests::cell_fixing ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "34f90f078deb96af78a0e48c94ac625ed9efd9ac1cfdd937430a2689fdb815fc"`
[INFO] running `"docker" "rm" "-f" "34f90f078deb96af78a0e48c94ac625ed9efd9ac1cfdd937430a2689fdb815fc"`
[INFO] [stdout] 34f90f078deb96af78a0e48c94ac625ed9efd9ac1cfdd937430a2689fdb815fc