[INFO] cloning repository https://github.com/philippeitis/RuzzleSolverRS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/philippeitis/RuzzleSolverRS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilippeitis%2FRuzzleSolverRS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilippeitis%2FRuzzleSolverRS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0aec26420a4cae3f2589f370075c205e9209fc3
[INFO] testing philippeitis/RuzzleSolverRS against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilippeitis%2FRuzzleSolverRS" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/philippeitis/RuzzleSolverRS on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/philippeitis/RuzzleSolverRS
[INFO] finished tweaking git repo https://github.com/philippeitis/RuzzleSolverRS
[INFO] tweaked toml for git repo https://github.com/philippeitis/RuzzleSolverRS written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/philippeitis/RuzzleSolverRS already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "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] d5278ecd73136b219e3e8923800477b513d4c96c356b59b4290655ce93c21774
[INFO] running `Command { std: "docker" "start" "-a" "d5278ecd73136b219e3e8923800477b513d4c96c356b59b4290655ce93c21774", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5278ecd73136b219e3e8923800477b513d4c96c356b59b4290655ce93c21774", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5278ecd73136b219e3e8923800477b513d4c96c356b59b4290655ce93c21774", kill_on_drop: false }`
[INFO] [stdout] d5278ecd73136b219e3e8923800477b513d4c96c356b59b4290655ce93c21774
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c361178a92f31c4ecac9d21b2487238017691c21c58b7939a12c07b59032c14
[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" "4c361178a92f31c4ecac9d21b2487238017691c21c58b7939a12c07b59032c14", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling ruzzle_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | /     /// Paths consist of 12 five bit vertices:
[INFO] [stdout] 101 | |     /// [continuation_flag:1][x:2][y:2]
[INFO] [stdout]     | |_______________________________________^
[INFO] [stdout] 102 | 
[INFO] [stdout] 103 |       let path = (16 | start_point) as u64;
[INFO] [stdout]     |       ------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]    --> src/main.rs:213:5
[INFO] [stdout]     |
[INFO] [stdout] 213 | /     while let res = reader.read_line(&mut s).expect("Reading prefixes failed.") {
[INFO] [stdout] 214 | |         if res == 0 {
[INFO] [stdout] 215 | |             break;
[INFO] [stdout] 216 | |         }
[INFO] [stdout] 217 | |         prefixes.insert(string_to_u64(&s[..res - 2].to_owned(), str_to_u64));
[INFO] [stdout] 218 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]    --> src/main.rs:246:5
[INFO] [stdout]     |
[INFO] [stdout] 246 | /     while let res = reader.read_line(&mut s).expect("Reading dictionary failed.") {
[INFO] [stdout] 247 | |         if res == 0 {
[INFO] [stdout] 248 | |             break;
[INFO] [stdout] 249 | |         }
[INFO] [stdout] 250 | |         dict.insert(string_to_u64(&s[..res - 2].to_owned(), str_to_u64));
[INFO] [stdout] 251 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PATH_TO_PREFIXES`
[INFO] [stdout]   --> src/main.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | const PATH_TO_PREFIXES: &str = r"data/prefixes/";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PATH_TO_DICTIONARY`
[INFO] [stdout]   --> src/main.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | const PATH_TO_DICTIONARY: &str = r"data/";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PREFIX_LOWER_BOUND`
[INFO] [stdout]   --> src/main.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | const PREFIX_LOWER_BOUND: usize = 2;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_to_u64`
[INFO] [stdout]    --> src/main.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn string_to_u64(string_to_convert: &String, str_to_u64: &HashMap<char, u64>) -> u64 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_prefixes`
[INFO] [stdout]    --> src/main.rs:206:4
[INFO] [stdout]     |
[INFO] [stdout] 206 | fn read_prefixes(str_to_u64: &HashMap<char, u64>) -> HashSet<u64, BuildHasherDefault<FnvHasher>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_dict`
[INFO] [stdout]    --> src/main.rs:239:4
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn read_dict(str_to_u64: &HashMap<char, u64>) -> HashSet<u64, BuildHasherDefault<FnvHasher>> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_visited`
[INFO] [stdout]    --> src/main.rs:381:4
[INFO] [stdout]     |
[INFO] [stdout] 381 | fn gen_visited() -> Vec<bool> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `Command { std: "docker" "inspect" "4c361178a92f31c4ecac9d21b2487238017691c21c58b7939a12c07b59032c14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c361178a92f31c4ecac9d21b2487238017691c21c58b7939a12c07b59032c14", kill_on_drop: false }`
[INFO] [stdout] 4c361178a92f31c4ecac9d21b2487238017691c21c58b7939a12c07b59032c14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f44a3a4bf4d1dda977d33b597db86346b105c88e17aa94edc0a40ac92ea27d46
[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" "f44a3a4bf4d1dda977d33b597db86346b105c88e17aa94edc0a40ac92ea27d46", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruzzle_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | /     /// Paths consist of 12 five bit vertices:
[INFO] [stdout] 101 | |     /// [continuation_flag:1][x:2][y:2]
[INFO] [stdout]     | |_______________________________________^
[INFO] [stdout] 102 | 
[INFO] [stdout] 103 |       let path = (16 | start_point) as u64;
[INFO] [stdout]     |       ------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]    --> src/main.rs:213:5
[INFO] [stdout]     |
[INFO] [stdout] 213 | /     while let res = reader.read_line(&mut s).expect("Reading prefixes failed.") {
[INFO] [stdout] 214 | |         if res == 0 {
[INFO] [stdout] 215 | |             break;
[INFO] [stdout] 216 | |         }
[INFO] [stdout] 217 | |         prefixes.insert(string_to_u64(&s[..res - 2].to_owned(), str_to_u64));
[INFO] [stdout] 218 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]    --> src/main.rs:246:5
[INFO] [stdout]     |
[INFO] [stdout] 246 | /     while let res = reader.read_line(&mut s).expect("Reading dictionary failed.") {
[INFO] [stdout] 247 | |         if res == 0 {
[INFO] [stdout] 248 | |             break;
[INFO] [stdout] 249 | |         }
[INFO] [stdout] 250 | |         dict.insert(string_to_u64(&s[..res - 2].to_owned(), str_to_u64));
[INFO] [stdout] 251 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PATH_TO_PREFIXES`
[INFO] [stdout]   --> src/main.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | const PATH_TO_PREFIXES: &str = r"data/prefixes/";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PATH_TO_DICTIONARY`
[INFO] [stdout]   --> src/main.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | const PATH_TO_DICTIONARY: &str = r"data/";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PREFIX_LOWER_BOUND`
[INFO] [stdout]   --> src/main.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | const PREFIX_LOWER_BOUND: usize = 2;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_to_u64`
[INFO] [stdout]    --> src/main.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn string_to_u64(string_to_convert: &String, str_to_u64: &HashMap<char, u64>) -> u64 {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_prefixes`
[INFO] [stdout]    --> src/main.rs:206:4
[INFO] [stdout]     |
[INFO] [stdout] 206 | fn read_prefixes(str_to_u64: &HashMap<char, u64>) -> HashSet<u64, BuildHasherDefault<FnvHasher>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_dict`
[INFO] [stdout]    --> src/main.rs:239:4
[INFO] [stdout]     |
[INFO] [stdout] 239 | fn read_dict(str_to_u64: &HashMap<char, u64>) -> HashSet<u64, BuildHasherDefault<FnvHasher>> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_visited`
[INFO] [stdout]    --> src/main.rs:381:4
[INFO] [stdout]     |
[INFO] [stdout] 381 | fn gen_visited() -> Vec<bool> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "f44a3a4bf4d1dda977d33b597db86346b105c88e17aa94edc0a40ac92ea27d46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f44a3a4bf4d1dda977d33b597db86346b105c88e17aa94edc0a40ac92ea27d46", kill_on_drop: false }`
[INFO] [stdout] f44a3a4bf4d1dda977d33b597db86346b105c88e17aa94edc0a40ac92ea27d46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", 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] 9f5585a52e3fb31cd84bcc8283b429335183f06da4f845ff3d09f1ea49c163d4
[INFO] running `Command { std: "docker" "start" "-a" "9f5585a52e3fb31cd84bcc8283b429335183f06da4f845ff3d09f1ea49c163d4", kill_on_drop: false }`
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 | /     /// Paths consist of 12 five bit vertices:
[INFO] [stderr] 101 | |     /// [continuation_flag:1][x:2][y:2]
[INFO] [stderr]     | |_______________________________________^
[INFO] [stderr] 102 | 
[INFO] [stderr] 103 |       let path = (16 | start_point) as u64;
[INFO] [stderr]     |       ------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]    --> src/main.rs:213:5
[INFO] [stderr]     |
[INFO] [stderr] 213 | /     while let res = reader.read_line(&mut s).expect("Reading prefixes failed.") {
[INFO] [stderr] 214 | |         if res == 0 {
[INFO] [stderr] 215 | |             break;
[INFO] [stderr] 216 | |         }
[INFO] [stderr] 217 | |         prefixes.insert(string_to_u64(&s[..res - 2].to_owned(), str_to_u64));
[INFO] [stderr] 218 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]    --> src/main.rs:246:5
[INFO] [stderr]     |
[INFO] [stderr] 246 | /     while let res = reader.read_line(&mut s).expect("Reading dictionary failed.") {
[INFO] [stderr] 247 | |         if res == 0 {
[INFO] [stderr] 248 | |             break;
[INFO] [stderr] 249 | |         }
[INFO] [stderr] 250 | |         dict.insert(string_to_u64(&s[..res - 2].to_owned(), str_to_u64));
[INFO] [stderr] 251 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PATH_TO_PREFIXES`
[INFO] [stderr]   --> src/main.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | const PATH_TO_PREFIXES: &str = r"data/prefixes/";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PATH_TO_DICTIONARY`
[INFO] [stderr]   --> src/main.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | const PATH_TO_DICTIONARY: &str = r"data/";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PREFIX_LOWER_BOUND`
[INFO] [stderr]   --> src/main.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | const PREFIX_LOWER_BOUND: usize = 2;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_to_u64`
[INFO] [stderr]    --> src/main.rs:154:4
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn string_to_u64(string_to_convert: &String, str_to_u64: &HashMap<char, u64>) -> u64 {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_prefixes`
[INFO] [stderr]    --> src/main.rs:206:4
[INFO] [stderr]     |
[INFO] [stderr] 206 | fn read_prefixes(str_to_u64: &HashMap<char, u64>) -> HashSet<u64, BuildHasherDefault<FnvHasher>> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_dict`
[INFO] [stderr]    --> src/main.rs:239:4
[INFO] [stderr]     |
[INFO] [stderr] 239 | fn read_dict(str_to_u64: &HashMap<char, u64>) -> HashSet<u64, BuildHasherDefault<FnvHasher>> {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_visited`
[INFO] [stderr]    --> src/main.rs:381:4
[INFO] [stderr]     |
[INFO] [stderr] 381 | fn gen_visited() -> Vec<bool> {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ruzzle_solver-c9b2e86a6205f542
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9f5585a52e3fb31cd84bcc8283b429335183f06da4f845ff3d09f1ea49c163d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f5585a52e3fb31cd84bcc8283b429335183f06da4f845ff3d09f1ea49c163d4", kill_on_drop: false }`
[INFO] [stdout] 9f5585a52e3fb31cd84bcc8283b429335183f06da4f845ff3d09f1ea49c163d4