[INFO] updating cached repository ShotaroTsuji/simple-phom
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ShotaroTsuji/simple-phom
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ShotaroTsuji/simple-phom" "work/ex/clippy-test-run/sources/stable/gh/ShotaroTsuji/simple-phom"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ShotaroTsuji/simple-phom'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ShotaroTsuji/simple-phom" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ShotaroTsuji/simple-phom"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ShotaroTsuji/simple-phom'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b53ef017d6b7b08b041bd90995a16eec8c427b2
[INFO] sha for GitHub repo ShotaroTsuji/simple-phom: 7b53ef017d6b7b08b041bd90995a16eec8c427b2
[INFO] validating manifest of ShotaroTsuji/simple-phom 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 ShotaroTsuji/simple-phom 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 ShotaroTsuji/simple-phom
[INFO] finished frobbing ShotaroTsuji/simple-phom
[INFO] frobbed toml for ShotaroTsuji/simple-phom written to work/ex/clippy-test-run/sources/stable/gh/ShotaroTsuji/simple-phom/Cargo.toml
[INFO] started frobbing ShotaroTsuji/simple-phom
[INFO] finished frobbing ShotaroTsuji/simple-phom
[INFO] frobbed toml for ShotaroTsuji/simple-phom written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ShotaroTsuji/simple-phom/Cargo.toml
[INFO] crate ShotaroTsuji/simple-phom 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 ShotaroTsuji/simple-phom against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ShotaroTsuji/simple-phom:/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 -Dclippy::into_iter_on_array" "-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] c247016b621feda0b683eee90d0743b339ff37aafdd4ec33a5e34a958082531e
[INFO] running `"docker" "start" "-a" "c247016b621feda0b683eee90d0743b339ff37aafdd4ec33a5e34a958082531e"`
[INFO] [stderr]     Checking simple-phom v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `dimension`
[INFO] [stderr]    --> src/z2reduction.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     dimension: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `birth`
[INFO] [stderr]    --> src/z2reduction.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     birth: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `death`
[INFO] [stderr]    --> src/z2reduction.rs:130:5
[INFO] [stderr]     |
[INFO] [stderr] 130 |     death: Option<usize>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `parent`
[INFO] [stderr]    --> src/z2reduction.rs:201:5
[INFO] [stderr]     |
[INFO] [stderr] 201 |     parent: Pairing<'a, C>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: item `filteredcomplex::FilteredComplex` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/filteredcomplex.rs:32:1
[INFO] [stderr]     |
[INFO] [stderr] 32  | / impl FilteredComplex {
[INFO] [stderr] 33  | |     pub fn new() -> FilteredComplex {
[INFO] [stderr] 34  | |         FilteredComplex {
[INFO] [stderr] 35  | |             start: 0,
[INFO] [stderr] ...   |
[INFO] [stderr] 114 | |     }
[INFO] [stderr] 115 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `filteredcomplex::FilteredComplex`
[INFO] [stderr]   --> src/filteredcomplex.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 | /     pub fn new() -> FilteredComplex {
[INFO] [stderr] 34 | |         FilteredComplex {
[INFO] [stderr] 35 | |             start: 0,
[INFO] [stderr] 36 | |             simplices: Vec::new(),
[INFO] [stderr] 37 | |         }
[INFO] [stderr] 38 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 27 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/filteredcomplex.rs:129:13
[INFO] [stderr]     |
[INFO] [stderr] 129 |             self.index = self.index + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.index += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/simplex.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |         assert!(vec.len() > 0, "vector has no element");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vec.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] error: this `if` has identical blocks
[INFO] [stderr]   --> src/simplex.rs:44:53
[INFO] [stderr]    |
[INFO] [stderr] 44 |           } else if self.index == self.vertices.len() {
[INFO] [stderr]    |  _____________________________________________________^
[INFO] [stderr] 45 | |             None
[INFO] [stderr] 46 | |         } else {
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::if_same_then_else)] on by default
[INFO] [stderr] note: same as this
[INFO] [stderr]   --> src/simplex.rs:42:37
[INFO] [stderr]    |
[INFO] [stderr] 42 |           if self.vertices.len() == 1 {
[INFO] [stderr]    |  _____________________________________^
[INFO] [stderr] 43 | |             None
[INFO] [stderr] 44 | |         } else if self.index == self.vertices.len() {
[INFO] [stderr]    | |_________^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> src/simplex.rs:49:35
[INFO] [stderr]    |
[INFO] [stderr] 49 |             let vec: Vec<usize> = head.chain(tail).map(|&x| x).collect();
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `head.chain(tail).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/simplex.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             self.index = self.index + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.index += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/simplex.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let ref v = &self.vertices;
[INFO] [stderr]    |         ----^^^^^------------------ help: try: `let v = &(&self.vertices);`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `z2reduction::Z2BoundaryMatrix<C>`
[INFO] [stderr]   --> src/z2reduction.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new() -> Z2BoundaryMatrix<C> {
[INFO] [stderr] 18 | |         Z2BoundaryMatrix {
[INFO] [stderr] 19 | |             columns: Vec::new(),
[INFO] [stderr] 20 | |         }
[INFO] [stderr] 21 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 6  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         self.columns.get(index).unwrap().lowest()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[index]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |             let left = self.columns.get(j1).unwrap();
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[j1]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:69:25
[INFO] [stderr]    |
[INFO] [stderr] 69 |             let right = self.columns.get(j2).unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[j2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let right = self.columns.get_mut(j2).unwrap();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[j2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |         if self.elements.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.elements.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:43:15
[INFO] [stderr]    |
[INFO] [stderr] 43 |         while left_slice.len() > 0 || right_slice.len() > 0 {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!left_slice.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:43:39
[INFO] [stderr]    |
[INFO] [stderr] 43 |         while left_slice.len() > 0 || right_slice.len() > 0 {
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!right_slice.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] error: this `if` has identical blocks
[INFO] [stderr]   --> src/z2vector.rs:50:54
[INFO] [stderr]    |
[INFO] [stderr] 50 |               } else if left_slice[0] > right_slice[0] {
[INFO] [stderr]    |  ______________________________________________________^
[INFO] [stderr] 51 | |                 result.push(left_slice[0]);
[INFO] [stderr] 52 | |                 left_slice = &left_slice[1..];
[INFO] [stderr] 53 | |             } else if left_slice[0] < right_slice[0] {
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr] note: same as this
[INFO] [stderr]   --> src/z2vector.rs:47:46
[INFO] [stderr]    |
[INFO] [stderr] 47 |               } else if right_slice.len() == 0 {
[INFO] [stderr]    |  ______________________________________________^
[INFO] [stderr] 48 | |                 result.push(left_slice[0]);
[INFO] [stderr] 49 | |                 left_slice = &left_slice[1..];
[INFO] [stderr] 50 | |             } else if left_slice[0] > right_slice[0] {
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |             if left_slice.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `left_slice.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:47:23
[INFO] [stderr]    |
[INFO] [stderr] 47 |             } else if right_slice.len() == 0 {
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `right_slice.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         self.elements.len() == 0
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.elements.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/z2vector.rs:84:13
[INFO] [stderr]    |
[INFO] [stderr] 84 |         let ref v = &self.elements;
[INFO] [stderr]    |         ----^^^^^------------------ help: try: `let v = &(&self.elements);`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `simple-phom`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: field is never used: `dimension`
[INFO] [stderr]    --> src/z2reduction.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     dimension: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `birth`
[INFO] [stderr]    --> src/z2reduction.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     birth: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `death`
[INFO] [stderr]    --> src/z2reduction.rs:130:5
[INFO] [stderr]     |
[INFO] [stderr] 130 |     death: Option<usize>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `parent`
[INFO] [stderr]    --> src/z2reduction.rs:201:5
[INFO] [stderr]     |
[INFO] [stderr] 201 |     parent: Pairing<'a, C>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: item `filteredcomplex::FilteredComplex` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/filteredcomplex.rs:32:1
[INFO] [stderr]     |
[INFO] [stderr] 32  | / impl FilteredComplex {
[INFO] [stderr] 33  | |     pub fn new() -> FilteredComplex {
[INFO] [stderr] 34  | |         FilteredComplex {
[INFO] [stderr] 35  | |             start: 0,
[INFO] [stderr] ...   |
[INFO] [stderr] 114 | |     }
[INFO] [stderr] 115 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `filteredcomplex::FilteredComplex`
[INFO] [stderr]   --> src/filteredcomplex.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 | /     pub fn new() -> FilteredComplex {
[INFO] [stderr] 34 | |         FilteredComplex {
[INFO] [stderr] 35 | |             start: 0,
[INFO] [stderr] 36 | |             simplices: Vec::new(),
[INFO] [stderr] 37 | |         }
[INFO] [stderr] 38 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 27 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/filteredcomplex.rs:129:13
[INFO] [stderr]     |
[INFO] [stderr] 129 |             self.index = self.index + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.index += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/simplex.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |         assert!(vec.len() > 0, "vector has no element");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vec.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] error: this `if` has identical blocks
[INFO] [stderr]   --> src/simplex.rs:44:53
[INFO] [stderr]    |
[INFO] [stderr] 44 |           } else if self.index == self.vertices.len() {
[INFO] [stderr]    |  _____________________________________________________^
[INFO] [stderr] 45 | |             None
[INFO] [stderr] 46 | |         } else {
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::if_same_then_else)] on by default
[INFO] [stderr] note: same as this
[INFO] [stderr]   --> src/simplex.rs:42:37
[INFO] [stderr]    |
[INFO] [stderr] 42 |           if self.vertices.len() == 1 {
[INFO] [stderr]    |  _____________________________________^
[INFO] [stderr] 43 | |             None
[INFO] [stderr] 44 | |         } else if self.index == self.vertices.len() {
[INFO] [stderr]    | |_________^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> src/simplex.rs:49:35
[INFO] [stderr]    |
[INFO] [stderr] 49 |             let vec: Vec<usize> = head.chain(tail).map(|&x| x).collect();
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `head.chain(tail).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/simplex.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             self.index = self.index + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.index += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/simplex.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let ref v = &self.vertices;
[INFO] [stderr]    |         ----^^^^^------------------ help: try: `let v = &(&self.vertices);`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `z2reduction::Z2BoundaryMatrix<C>`
[INFO] [stderr]   --> src/z2reduction.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new() -> Z2BoundaryMatrix<C> {
[INFO] [stderr] 18 | |         Z2BoundaryMatrix {
[INFO] [stderr] 19 | |             columns: Vec::new(),
[INFO] [stderr] 20 | |         }
[INFO] [stderr] 21 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 6  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         self.columns.get(index).unwrap().lowest()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[index]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |             let left = self.columns.get(j1).unwrap();
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[j1]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:69:25
[INFO] [stderr]    |
[INFO] [stderr] 69 |             let right = self.columns.get(j2).unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[j2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/z2reduction.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let right = self.columns.get_mut(j2).unwrap();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `self.columns[j2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |         if self.elements.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.elements.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:43:15
[INFO] [stderr]    |
[INFO] [stderr] 43 |         while left_slice.len() > 0 || right_slice.len() > 0 {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!left_slice.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:43:39
[INFO] [stderr]    |
[INFO] [stderr] 43 |         while left_slice.len() > 0 || right_slice.len() > 0 {
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!right_slice.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] error: this `if` has identical blocks
[INFO] [stderr]   --> src/z2vector.rs:50:54
[INFO] [stderr]    |
[INFO] [stderr] 50 |               } else if left_slice[0] > right_slice[0] {
[INFO] [stderr]    |  ______________________________________________________^
[INFO] [stderr] 51 | |                 result.push(left_slice[0]);
[INFO] [stderr] 52 | |                 left_slice = &left_slice[1..];
[INFO] [stderr] 53 | |             } else if left_slice[0] < right_slice[0] {
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr] note: same as this
[INFO] [stderr]   --> src/z2vector.rs:47:46
[INFO] [stderr]    |
[INFO] [stderr] 47 |               } else if right_slice.len() == 0 {
[INFO] [stderr]    |  ______________________________________________^
[INFO] [stderr] 48 | |                 result.push(left_slice[0]);
[INFO] [stderr] 49 | |                 left_slice = &left_slice[1..];
[INFO] [stderr] 50 | |             } else if left_slice[0] > right_slice[0] {
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |             if left_slice.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `left_slice.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:47:23
[INFO] [stderr]    |
[INFO] [stderr] 47 |             } else if right_slice.len() == 0 {
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `right_slice.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: length comparison to zero
[INFO] [stderr]   --> src/z2vector.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         self.elements.len() == 0
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.elements.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/z2vector.rs:84:13
[INFO] [stderr]    |
[INFO] [stderr] 84 |         let ref v = &self.elements;
[INFO] [stderr]    |         ----^^^^^------------------ help: try: `let v = &(&self.elements);`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `simple-phom`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c247016b621feda0b683eee90d0743b339ff37aafdd4ec33a5e34a958082531e"`
[INFO] running `"docker" "rm" "-f" "c247016b621feda0b683eee90d0743b339ff37aafdd4ec33a5e34a958082531e"`
[INFO] [stdout] c247016b621feda0b683eee90d0743b339ff37aafdd4ec33a5e34a958082531e