warning: items after a test module
   --> halo2_gadgets/src/utilities_opt/lookup_range_check.rs:257:1
    |
257 | mod tests {
    | ^^^^^^^^^
...
564 | pub(crate) type DefaultLookupRangeCheckConfigOptimized =
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...
567 | impl DefaultLookupRangeCheck for DefaultLookupRangeCheckConfigOptimized {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#items_after_test_module
    = note: `-W clippy::items-after-test-module` implied by `-W clippy::all`
    = help: to override `-W clippy::all` add `#[allow(clippy::items_after_test_module)]`
    = help: move the items to before the test module was defined

warning: an array of `Range` that is only one element
   --> halo2_gadgets/src/utilities.rs:407:47
    |
407 |         decompose(pallas::Base::random(rng), &[0..255]);
    |                                               ^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_range_in_vec_init
    = note: `-W clippy::single-range-in-vec-init` implied by `-W clippy::all`
    = help: to override `-W clippy::all` add `#[allow(clippy::single_range_in_vec_init)]`
help: if you wanted a `Vec` that contains the entire range, try
    |
407 |         decompose(pallas::Base::random(rng), &(0..255).collect::<std::vec::Vec<usize>>());
    |                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
help: if you wanted an array of len 255, try
    |
407 |         decompose(pallas::Base::random(rng), &[0; 255]);
    |                                                ~~~~~~

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/utilities.rs:127:34
    |
127 |             _phantom: PhantomData::default(),
    |                                  ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/utilities.rs:118:34
    |
118 |             _phantom: PhantomData::default(),
    |                                  ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/utilities.rs:103:34
    |
103 |             _phantom: PhantomData::default(),
    |                                  ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> halo2_gadgets/src/sinsemilla_opt.rs:381:48
    |
381 | ...                   .chain(right.into_iter()),
    |                              ^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `right`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/205af5d6beedc895b7f1fa2cdcae634bc2754cce/library/core/src/iter/traits/iterator.rs:483:12
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> halo2_gadgets/src/sinsemilla_opt.rs:380:48
    |
380 | ...                   .chain(left.into_iter())
    |                              ^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `left`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/205af5d6beedc895b7f1fa2cdcae634bc2754cce/library/core/src/iter/traits/iterator.rs:483:12
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion

warning: use of `default` to create a unit struct
  --> halo2_gadgets/src/sinsemilla_opt/primitives.rs:57:31
   |
57 |         let mut os_rng = OsRng::default();
   |                               ^^^^^^^^^^^ help: remove this call to `default`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> halo2_gadgets/src/sinsemilla.rs:704:48
    |
704 | ...                   .chain(right.into_iter()),
    |                              ^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `right`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/205af5d6beedc895b7f1fa2cdcae634bc2754cce/library/core/src/iter/traits/iterator.rs:483:12
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> halo2_gadgets/src/sinsemilla.rs:703:48
    |
703 | ...                   .chain(left.into_iter())
    |                              ^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `left`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/205af5d6beedc895b7f1fa2cdcae634bc2754cce/library/core/src/iter/traits/iterator.rs:483:12
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
    = note: `-W clippy::useless-conversion` implied by `-W clippy::all`
    = help: to override `-W clippy::all` add `#[allow(clippy::useless_conversion)]`

warning: this expression creates a reference which is immediately dereferenced by the compiler
   --> halo2_gadgets/src/sinsemilla/chip.rs:215:44
    |
215 |                 Self::get_y_q_advice(meta, &config)
    |                                            ^^^^^^^ help: change this to: `config`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow

warning: this expression creates a reference which is immediately dereferenced by the compiler
   --> halo2_gadgets/src/sinsemilla/chip.rs:213:43
    |
213 |                 Self::get_y_q_fixed(meta, &config)
    |                                           ^^^^^^^ help: change this to: `config`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
    = note: `-W clippy::needless-borrow` implied by `-W clippy::all`
    = help: to override `-W clippy::all` add `#[allow(clippy::needless_borrow)]`

warning: very complex type used. Consider factoring parts into `type` definitions
  --> halo2_gadgets/src/sinsemilla/chip/hash_to_point.rs:83:10
   |
83 |       ) -> Result<
   |  __________^
84 | |         (
85 | |             NonIdentityEccPoint,
86 | |             Vec<Vec<AssignedCell<pallas::Base, pallas::Base>>>,
87 | |         ),
88 | |         Error,
89 | |     > {
   | |_____^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
   = note: `-W clippy::type-complexity` implied by `-W clippy::all`
   = help: to override `-W clippy::all` add `#[allow(clippy::type_complexity)]`

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon.rs:206:33
    |
206 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon.rs:159:33
    |
159 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon/primitives.rs:363:33
    |
363 |             _domain: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon/primitives.rs:257:33
    |
257 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon/primitives.rs:220:33
    |
220 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
  --> halo2_gadgets/src/poseidon/primitives/p128pow5t3.rs:88:38
   |
88 |             P128Pow5T3Gen(PhantomData::default())
   |                                      ^^^^^^^^^^^ help: remove this call to `default`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
  --> halo2_gadgets/src/poseidon/primitives/grain.rs:72:32
   |
72 |             _field: PhantomData::default(),
   |                                ^^^^^^^^^^^ help: remove this call to `default`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs
   = note: `-W clippy::default-constructed-unit-structs` implied by `-W clippy::all`
   = help: to override `-W clippy::all` add `#[allow(clippy::default_constructed_unit_structs)]`

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/poseidon/pow5.rs:517:77
    |
517 |                 let r_0 = (p[0] + config.round_constants[round + 1][0]).pow(&config.alpha);
    |                                                                             ^^^^^^^^^^^^^ help: change this to: `config.alpha`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/poseidon/pow5.rs:477:73
    |
477 |                 let r_0 = (p[0] + config.round_constants[round][0]).pow(&config.alpha);
    |                                                                         ^^^^^^^^^^^^^ help: change this to: `config.alpha`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/poseidon/pow5.rs:451:62
    |
451 |             let r: Value<Vec<F>> = q.map(|q| q.map(|q| q.pow(&config.alpha))).collect();
    |                                                              ^^^^^^^^^^^^^ help: change this to: `config.alpha`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: usage of `Iterator::fold` on a type that implements `Try`
   --> halo2_gadgets/src/poseidon/pow5.rs:256:58
    |
256 |                   let state = (0..config.half_full_rounds).fold(Ok(state), |res, r| {
    |  __________________________________________________________^
257 | |                     res.and_then(|state| {
258 | |                         state.full_round(
259 | |                             &mut region,
...   |
264 | |                     })
265 | |                 })?;
    | |__________________^ help: use `try_fold` instead: `try_fold(state, |res, r| ...)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold

warning: usage of `Iterator::fold` on a type that implements `Try`
   --> halo2_gadgets/src/poseidon/pow5.rs:245:61
    |
245 |                   let state = (0..config.half_partial_rounds).fold(Ok(state), |res, r| {
    |  _____________________________________________________________^
246 | |                     res.and_then(|state| {
247 | |                         state.partial_round(
248 | |                             &mut region,
...   |
253 | |                     })
254 | |                 })?;
    | |__________________^ help: use `try_fold` instead: `try_fold(state, |res, r| ...)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold