[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 beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfauglith%2Fsudoku" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anfauglith/sudoku on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "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-9/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" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-06-03" "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] 82d7d7a53d412662b404c43482a29c5e1f825dbd632e1379570a753bb818f152
[INFO] running `"docker" "start" "-a" "82d7d7a53d412662b404c43482a29c5e1f825dbd632e1379570a753bb818f152"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: constant 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: associated function is never used: `empty_cell`
[INFO] [stderr]   --> src/field.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn empty_cell() -> Cell {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fixed_cell`
[INFO] [stderr]   --> src/field.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn fixed_cell(digit: u8) -> Cell {
[INFO] [stderr]    |            ^^^^^^^^^^
[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: associated function is never used: `is_fixed`
[INFO] [stderr]   --> src/field.rs:39:12
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn is_fixed(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_digit`
[INFO] [stderr]   --> src/field.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn get_digit(&self) -> Option<u8> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fix`
[INFO] [stderr]   --> src/field.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn fix(&mut self) -> bool {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_to`
[INFO] [stderr]   --> src/field.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 |     fn set_to(&mut self, digit: u8) -> bool {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fix_to`
[INFO] [stderr]   --> src/field.rs:66:12
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn fix_to(&mut self, digit: u8) -> bool {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `has_candidate`
[INFO] [stderr]   --> src/field.rs:73:12
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn has_candidate(&self, candidate: u8) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_candidates`
[INFO] [stderr]   --> src/field.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn get_candidates(&self) -> u16 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_candidate_vector`
[INFO] [stderr]   --> src/field.rs:81:12
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn get_candidate_vector(&self) -> Vec<u8> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove_candidate`
[INFO] [stderr]   --> src/field.rs:91:12
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn remove_candidate(&mut self, candidate: u8) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove_candidates`
[INFO] [stderr]   --> src/field.rs:96:12
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn remove_candidates(&mut self, candidates: Vec<u8>) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `has_single_candidate`
[INFO] [stderr]    --> src/field.rs:102:12
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn has_single_candidate(&self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_naked_single`
[INFO] [stderr]    --> src/field.rs:106:12
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn get_naked_single(&self) -> Option<u8> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `try_solve`
[INFO] [stderr]    --> src/field.rs:119:12
[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 0.61s
[INFO] running `"docker" "inspect" "82d7d7a53d412662b404c43482a29c5e1f825dbd632e1379570a753bb818f152"`
[INFO] running `"docker" "rm" "-f" "82d7d7a53d412662b404c43482a29c5e1f825dbd632e1379570a753bb818f152"`
[INFO] [stdout] 82d7d7a53d412662b404c43482a29c5e1f825dbd632e1379570a753bb818f152
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-06-03" "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] c177c410e1416ca2055f914e0f3548f9c35ebefdfed40111f3b7162e6c664d0c
[INFO] running `"docker" "start" "-a" "c177c410e1416ca2055f914e0f3548f9c35ebefdfed40111f3b7162e6c664d0c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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: 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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `"docker" "inspect" "c177c410e1416ca2055f914e0f3548f9c35ebefdfed40111f3b7162e6c664d0c"`
[INFO] running `"docker" "rm" "-f" "c177c410e1416ca2055f914e0f3548f9c35ebefdfed40111f3b7162e6c664d0c"`
[INFO] [stdout] c177c410e1416ca2055f914e0f3548f9c35ebefdfed40111f3b7162e6c664d0c
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-06-03" "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] 06020700ddb1043909f1c338a69348b5fdad13129de0cbcc6be9582d3993cdba
[INFO] running `"docker" "start" "-a" "06020700ddb1043909f1c338a69348b5fdad13129de0cbcc6be9582d3993cdba"`
[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: 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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sudoku-63db3b7f432b40e0
[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" "06020700ddb1043909f1c338a69348b5fdad13129de0cbcc6be9582d3993cdba"`
[INFO] running `"docker" "rm" "-f" "06020700ddb1043909f1c338a69348b5fdad13129de0cbcc6be9582d3993cdba"`
[INFO] [stdout] 06020700ddb1043909f1c338a69348b5fdad13129de0cbcc6be9582d3993cdba