[INFO] updating cached repository bobvandenberge/dammen-in-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bobvandenberge/dammen-in-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bobvandenberge/dammen-in-rust" "work/ex/clippy-test-run/sources/stable/gh/bobvandenberge/dammen-in-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/bobvandenberge/dammen-in-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bobvandenberge/dammen-in-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/bobvandenberge/dammen-in-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/bobvandenberge/dammen-in-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9f99688a5cef38ff10e1ba94a0a6181bbec82324
[INFO] sha for GitHub repo bobvandenberge/dammen-in-rust: 9f99688a5cef38ff10e1ba94a0a6181bbec82324
[INFO] validating manifest of bobvandenberge/dammen-in-rust on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bobvandenberge/dammen-in-rust on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bobvandenberge/dammen-in-rust
[INFO] finished frobbing bobvandenberge/dammen-in-rust
[INFO] frobbed toml for bobvandenberge/dammen-in-rust written to work/ex/clippy-test-run/sources/stable/gh/bobvandenberge/dammen-in-rust/Cargo.toml
[INFO] started frobbing bobvandenberge/dammen-in-rust
[INFO] finished frobbing bobvandenberge/dammen-in-rust
[INFO] frobbed toml for bobvandenberge/dammen-in-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/bobvandenberge/dammen-in-rust/Cargo.toml
[INFO] crate bobvandenberge/dammen-in-rust has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting bobvandenberge/dammen-in-rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/bobvandenberge/dammen-in-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f85a3567f0973e2061175e8e339887f70bdb9a2da8adbb8cc7a135b478baaaec
[INFO] running `"docker" "start" "-a" "f85a3567f0973e2061175e8e339887f70bdb9a2da8adbb8cc7a135b478baaaec"`
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking dammen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core/bord.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |         return bord;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `bord`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core/engine/regels.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         return Ok(());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core/engine/regels.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         return Err(String::from("Je mag maar 1 stap per keer zetten"))
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err(String::from("Je mag maar 1 stap per keer zetten"))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core/bord.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let mut veld = &mut self.velden[index];
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dam`
[INFO] [stderr]   --> src/core/schijf.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Dam(SchijfKleur),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/core/engine/regels.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn new(geslagen_schijf_positie: u32, eind_positie: u32) -> SlagOptie {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BeurtBlijftGelijk`
[INFO] [stderr]   --> src/core/engine/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     BeurtBlijftGelijk,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]  --> src/core/schijf.rs:8:30
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn tegenovergestelde(&self) -> SchijfKleur {
[INFO] [stderr]   |                              ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/core/schijf.rs:9:9
[INFO] [stderr]    |
[INFO] [stderr] 9  | /         match self {
[INFO] [stderr] 10 | |             &SchijfKleur::Wit => SchijfKleur::Zwart,
[INFO] [stderr] 11 | |             &SchijfKleur::Zwart => SchijfKleur::Wit,
[INFO] [stderr] 12 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 9  |         match *self {
[INFO] [stderr] 10 |             SchijfKleur::Wit => SchijfKleur::Zwart,
[INFO] [stderr] 11 |             SchijfKleur::Zwart => SchijfKleur::Wit,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/core/zet.rs:28:46
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn converteer_naar_index(&self, address: &String) -> Result<usize, String> {
[INFO] [stderr]    |                                              ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/core/bord.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 |         if index >= 100 || index < 0 {
[INFO] [stderr]    |                            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]   --> src/core/bord.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 |         if index >= 100 || index < 0 {
[INFO] [stderr]    |                            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]    = help: because 0 is the minimum value for this type, this comparison is always false
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn bron_veld_moet_schijf_bevatten(_: &SchijfKleur, bord: &mut Bord, (bron, _): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:24:36
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn doel_veld_moet_leeg_zijn(_: &SchijfKleur, bord: &mut Bord, (_, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:33:46
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn eigen_beurt_eigen_kleur(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, _): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:47:43
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn alleen_bruine_vlakken_gebruiken(_: &SchijfKleur, _: &mut Bord, (_, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:56:61
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn maar_1_stap_per_keer_voor_enkel_schijf(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/core/engine/regels.rs:62:8
[INFO] [stderr]    |
[INFO] [stderr] 62 |     if kan_slaan(aan_de_beurt, bord).len() != 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!kan_slaan(aan_de_beurt, bord).is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:75:41
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn slaan_is_verplicht(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/core/engine/regels.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 |     if slaan_mogelijkheden.len() == 0 || slaan_mogelijkheden.iter().filter(|optie| optie.eind_positie == doel).count() == 1 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `slaan_mogelijkheden.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:90:50
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn geen_schijven_is_einde_spel(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (_, _): (usize, usize)) -> NaVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:99:58
[INFO] [stderr]    |
[INFO] [stderr] 99 | pub fn slaan_verwijderd_de_geslagen_schijf(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, _): (usize, usize)) -> NaVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                                          ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/core/engine/regels.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 | /     if slag.is_none() {
[INFO] [stderr] 106 | |         return None;
[INFO] [stderr] 107 | |     }
[INFO] [stderr]     | |_____^ help: replace_it_with: `slag?;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/core/engine/regels.rs:139:28
[INFO] [stderr]     |
[INFO] [stderr] 139 | fn kan_slaan(aan_de_beurt: &SchijfKleur, bord: &Bord) -> Vec<SlagOptie> {
[INFO] [stderr]     |                            ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/core/engine/regels.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 | /         match veld.get_schijf() {
[INFO] [stderr] 144 | |             &Some(Schijf::Enkel(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr] 145 | |             &Some(Schijf::Dam(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr] 146 | |             _ => continue
[INFO] [stderr] 147 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 143 |         match *veld.get_schijf() {
[INFO] [stderr] 144 |             Some(Schijf::Enkel(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr] 145 |             Some(Schijf::Dam(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/mod.rs:19:42
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn voer_zet_uit(&self, aan_de_beurt: &SchijfKleur, bord: &mut Bord, zet: &Zet) -> Result<ZetUitkomst, String>;
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/core/engine/mod.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 | /             match (*function)(aan_de_beurt, bord, (bron, doel)) {
[INFO] [stderr] 42 | |                 Some(uitkomst) => return Ok(uitkomst),
[INFO] [stderr] 43 | |                 _ => ()
[INFO] [stderr] 44 | |             }
[INFO] [stderr]    | |_____________^ help: try this: `if let Some(uitkomst) = (*function)(aan_de_beurt, bord, (bron, doel)) { return Ok(uitkomst) }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/ui/printer.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 | /         match veld.get_schijf() {
[INFO] [stderr] 30 | |             &Some(Schijf::Enkel(SchijfKleur::Wit)) => print!("[ WE ]"),
[INFO] [stderr] 31 | |             &Some(Schijf::Enkel(SchijfKleur::Zwart)) => print!("[ ZE ]"),
[INFO] [stderr] 32 | |             &Some(Schijf::Dam(SchijfKleur::Wit)) => print!("[ WD ]"),
[INFO] [stderr] 33 | |             &Some(Schijf::Dam(SchijfKleur::Zwart)) => print!("[ ZD ]"),
[INFO] [stderr] 34 | |             &None => print!("[    ]")
[INFO] [stderr] 35 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 29 |         match *veld.get_schijf() {
[INFO] [stderr] 30 |             Some(Schijf::Enkel(SchijfKleur::Wit)) => print!("[ WE ]"),
[INFO] [stderr] 31 |             Some(Schijf::Enkel(SchijfKleur::Zwart)) => print!("[ ZE ]"),
[INFO] [stderr] 32 |             Some(Schijf::Dam(SchijfKleur::Wit)) => print!("[ WD ]"),
[INFO] [stderr] 33 |             Some(Schijf::Dam(SchijfKleur::Zwart)) => print!("[ ZD ]"),
[INFO] [stderr] 34 |             None => print!("[    ]")
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/ui/mod.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | /     match spel.zet(&zet) {
[INFO] [stderr] 24 | |         Err(_error) => {
[INFO] [stderr] 25 | |             println!("{}", _error);
[INFO] [stderr] 26 | |             verkrijg_zet_en_voer_uit(spel);
[INFO] [stderr] 27 | |         },
[INFO] [stderr] 28 | |         _ => ()
[INFO] [stderr] 29 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 23 |     if let Err(_error) = spel.zet(&zet) {
[INFO] [stderr] 24 |     println!("{}", _error);
[INFO] [stderr] 25 |     verkrijg_zet_en_voer_uit(spel);
[INFO] [stderr] 26 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `dammen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core/bord.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |         return bord;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `bord`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core/engine/regels.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         return Ok(());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core/engine/regels.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         return Err(String::from("Je mag maar 1 stap per keer zetten"))
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err(String::from("Je mag maar 1 stap per keer zetten"))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core/bord.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let mut veld = &mut self.velden[index];
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dam`
[INFO] [stderr]   --> src/core/schijf.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Dam(SchijfKleur),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BeurtBlijftGelijk`
[INFO] [stderr]   --> src/core/engine/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     BeurtBlijftGelijk,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]  --> src/core/schijf.rs:8:30
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn tegenovergestelde(&self) -> SchijfKleur {
[INFO] [stderr]   |                              ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/core/schijf.rs:9:9
[INFO] [stderr]    |
[INFO] [stderr] 9  | /         match self {
[INFO] [stderr] 10 | |             &SchijfKleur::Wit => SchijfKleur::Zwart,
[INFO] [stderr] 11 | |             &SchijfKleur::Zwart => SchijfKleur::Wit,
[INFO] [stderr] 12 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 9  |         match *self {
[INFO] [stderr] 10 |             SchijfKleur::Wit => SchijfKleur::Zwart,
[INFO] [stderr] 11 |             SchijfKleur::Zwart => SchijfKleur::Wit,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/core/zet.rs:28:46
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn converteer_naar_index(&self, address: &String) -> Result<usize, String> {
[INFO] [stderr]    |                                              ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/core/bord.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 |         if index >= 100 || index < 0 {
[INFO] [stderr]    |                            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]   --> src/core/bord.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 |         if index >= 100 || index < 0 {
[INFO] [stderr]    |                            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]    = help: because 0 is the minimum value for this type, this comparison is always false
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:15:42
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn bron_veld_moet_schijf_bevatten(_: &SchijfKleur, bord: &mut Bord, (bron, _): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:24:36
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn doel_veld_moet_leeg_zijn(_: &SchijfKleur, bord: &mut Bord, (_, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:33:46
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn eigen_beurt_eigen_kleur(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, _): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:47:43
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub fn alleen_bruine_vlakken_gebruiken(_: &SchijfKleur, _: &mut Bord, (_, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:56:61
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn maar_1_stap_per_keer_voor_enkel_schijf(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/core/engine/regels.rs:62:8
[INFO] [stderr]    |
[INFO] [stderr] 62 |     if kan_slaan(aan_de_beurt, bord).len() != 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!kan_slaan(aan_de_beurt, bord).is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:75:41
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn slaan_is_verplicht(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, doel): (usize, usize)) -> VoorVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/core/engine/regels.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 |     if slaan_mogelijkheden.len() == 0 || slaan_mogelijkheden.iter().filter(|optie| optie.eind_positie == doel).count() == 1 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `slaan_mogelijkheden.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:90:50
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn geen_schijven_is_einde_spel(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (_, _): (usize, usize)) -> NaVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                                  ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/regels.rs:99:58
[INFO] [stderr]    |
[INFO] [stderr] 99 | pub fn slaan_verwijderd_de_geslagen_schijf(aan_de_beurt: &SchijfKleur, bord: &mut Bord, (bron, _): (usize, usize)) -> NaVerplaatsenRegelUitkomst {
[INFO] [stderr]    |                                                          ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/core/engine/regels.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 | /     if slag.is_none() {
[INFO] [stderr] 106 | |         return None;
[INFO] [stderr] 107 | |     }
[INFO] [stderr]     | |_____^ help: replace_it_with: `slag?;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/core/engine/regels.rs:139:28
[INFO] [stderr]     |
[INFO] [stderr] 139 | fn kan_slaan(aan_de_beurt: &SchijfKleur, bord: &Bord) -> Vec<SlagOptie> {
[INFO] [stderr]     |                            ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/core/engine/regels.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 | /         match veld.get_schijf() {
[INFO] [stderr] 144 | |             &Some(Schijf::Enkel(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr] 145 | |             &Some(Schijf::Dam(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr] 146 | |             _ => continue
[INFO] [stderr] 147 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 143 |         match *veld.get_schijf() {
[INFO] [stderr] 144 |             Some(Schijf::Enkel(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr] 145 |             Some(Schijf::Dam(kleur)) if kleur == *aan_de_beurt => (),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/core/engine/mod.rs:19:42
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn voer_zet_uit(&self, aan_de_beurt: &SchijfKleur, bord: &mut Bord, zet: &Zet) -> Result<ZetUitkomst, String>;
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: consider passing by value instead: `SchijfKleur`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/core/engine/mod.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 | /             match (*function)(aan_de_beurt, bord, (bron, doel)) {
[INFO] [stderr] 42 | |                 Some(uitkomst) => return Ok(uitkomst),
[INFO] [stderr] 43 | |                 _ => ()
[INFO] [stderr] 44 | |             }
[INFO] [stderr]    | |_____________^ help: try this: `if let Some(uitkomst) = (*function)(aan_de_beurt, bord, (bron, doel)) { return Ok(uitkomst) }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/core/engine/mod.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |         (*engine).voer_zet_uit(&SchijfKleur::Wit, &mut bord, &zet);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/core/engine/mod.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |         (*engine).voer_zet_uit(&SchijfKleur::Zwart, &mut bord, &zet);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/core/engine/mod.rs:206:9
[INFO] [stderr]     |
[INFO] [stderr] 206 |         (*engine).voer_zet_uit(&SchijfKleur::Wit, &mut bord, &zet);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/core/engine/mod.rs:213:9
[INFO] [stderr]     |
[INFO] [stderr] 213 |         (*engine).voer_zet_uit(&SchijfKleur::Zwart, &mut bord, &zet);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/core/engine/mod.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         (*engine).voer_zet_uit(&SchijfKleur::Wit, &mut bord, &zet);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/core/engine/mod.rs:241:9
[INFO] [stderr]     |
[INFO] [stderr] 241 |         (*engine).voer_zet_uit(&SchijfKleur::Zwart, &mut bord, &zet);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/ui/printer.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 | /         match veld.get_schijf() {
[INFO] [stderr] 30 | |             &Some(Schijf::Enkel(SchijfKleur::Wit)) => print!("[ WE ]"),
[INFO] [stderr] 31 | |             &Some(Schijf::Enkel(SchijfKleur::Zwart)) => print!("[ ZE ]"),
[INFO] [stderr] 32 | |             &Some(Schijf::Dam(SchijfKleur::Wit)) => print!("[ WD ]"),
[INFO] [stderr] 33 | |             &Some(Schijf::Dam(SchijfKleur::Zwart)) => print!("[ ZD ]"),
[INFO] [stderr] 34 | |             &None => print!("[    ]")
[INFO] [stderr] 35 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 29 |         match *veld.get_schijf() {
[INFO] [stderr] 30 |             Some(Schijf::Enkel(SchijfKleur::Wit)) => print!("[ WE ]"),
[INFO] [stderr] 31 |             Some(Schijf::Enkel(SchijfKleur::Zwart)) => print!("[ ZE ]"),
[INFO] [stderr] 32 |             Some(Schijf::Dam(SchijfKleur::Wit)) => print!("[ WD ]"),
[INFO] [stderr] 33 |             Some(Schijf::Dam(SchijfKleur::Zwart)) => print!("[ ZD ]"),
[INFO] [stderr] 34 |             None => print!("[    ]")
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/ui/mod.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | /     match spel.zet(&zet) {
[INFO] [stderr] 24 | |         Err(_error) => {
[INFO] [stderr] 25 | |             println!("{}", _error);
[INFO] [stderr] 26 | |             verkrijg_zet_en_voer_uit(spel);
[INFO] [stderr] 27 | |         },
[INFO] [stderr] 28 | |         _ => ()
[INFO] [stderr] 29 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 23 |     if let Err(_error) = spel.zet(&zet) {
[INFO] [stderr] 24 |     println!("{}", _error);
[INFO] [stderr] 25 |     verkrijg_zet_en_voer_uit(spel);
[INFO] [stderr] 26 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `dammen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f85a3567f0973e2061175e8e339887f70bdb9a2da8adbb8cc7a135b478baaaec"`
[INFO] running `"docker" "rm" "-f" "f85a3567f0973e2061175e8e339887f70bdb9a2da8adbb8cc7a135b478baaaec"`
[INFO] [stdout] f85a3567f0973e2061175e8e339887f70bdb9a2da8adbb8cc7a135b478baaaec