[INFO] crate stamm 0.2.0 is already in cache
[INFO] extracting crate stamm 0.2.0 into work/ex/clippy-test-run/sources/stable/reg/stamm/0.2.0
[INFO] extracting crate stamm 0.2.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/stamm/0.2.0
[INFO] validating manifest of stamm-0.2.0 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 stamm-0.2.0 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 stamm-0.2.0
[INFO] finished frobbing stamm-0.2.0
[INFO] frobbed toml for stamm-0.2.0 written to work/ex/clippy-test-run/sources/stable/reg/stamm/0.2.0/Cargo.toml
[INFO] started frobbing stamm-0.2.0
[INFO] finished frobbing stamm-0.2.0
[INFO] frobbed toml for stamm-0.2.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/stamm/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 stamm-0.2.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/stamm/0.2.0:/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] ec7005a8514cc71e643cb5581715ce4126ffb91272d57d35bfad1e1b2e066298
[INFO] running `"docker" "start" "-a" "ec7005a8514cc71e643cb5581715ce4126ffb91272d57d35bfad1e1b2e066298"`
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking stamm v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/randforest.rs:135:13
[INFO] [stderr]     |
[INFO] [stderr] 135 |             number_of_trees: number_of_trees,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `number_of_trees`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/randforest.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |             size_of_subset_per_training: size_of_subset_per_training,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `size_of_subset_per_training`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/numerictree.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |             min_subset_size: min_subset_size,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `min_subset_size`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/numerictree.rs:102:13
[INFO] [stderr]     |
[INFO] [stderr] 102 |             max_depth: max_depth,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `max_depth`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/randforest.rs:135:13
[INFO] [stderr]     |
[INFO] [stderr] 135 |             number_of_trees: number_of_trees,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `number_of_trees`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/randforest.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |             size_of_subset_per_training: size_of_subset_per_training,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `size_of_subset_per_training`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/numerictree.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |             min_subset_size: min_subset_size,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `min_subset_size`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/numerictree.rs:102:13
[INFO] [stderr]     |
[INFO] [stderr] 102 |             max_depth: max_depth,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `max_depth`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/tree.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         return (a, b);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `(a, b)`
[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/randforest.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         return f64::from(*self);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `f64::from(*self)`
[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/randforest.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         return (sum as f64) / (tree_results.len() as f64);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(sum as f64) / (tree_results.len() as f64)`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/randforest.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |                 tree
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/randforest.rs:186:28
[INFO] [stderr]     |
[INFO] [stderr] 186 |                 let tree = self.tree_param.learn_tree(self.learn_function, &subset[..]);
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/numerictree.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         return -(rel * ln!(rel) + (1f64 - rel) * ln!(1f64 - rel));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `-(rel * ln!(rel) + (1f64 - rel) * ln!(1f64 - rel))`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/numerictree.rs:146:9
[INFO] [stderr]     |
[INFO] [stderr] 146 |         res
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/numerictree.rs:143:19
[INFO] [stderr]     |
[INFO] [stderr] 143 |           let res = ((set_l.len() as f64) * self.set_impurity.impurity(set_l) +
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 144 | |                        (set_r.len() as f64) * self.set_impurity.impurity(set_r)) /
[INFO] [stderr] 145 | |             size;
[INFO] [stderr]     | |________________^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/numerictree.rs:158:25
[INFO] [stderr]     |
[INFO] [stderr] 158 |                         res
[INFO] [stderr]     |                         ^^^
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/numerictree.rs:157:35
[INFO] [stderr]     |
[INFO] [stderr] 157 |                         let res = rng.gen_range(self.min_nr, self.max_nr);
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/numerictree.rs:175:9
[INFO] [stderr]     |
[INFO] [stderr] 175 |         return NumericLeafParam { probability: prob };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `NumericLeafParam { probability: prob }`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/numerictree.rs:240:9
[INFO] [stderr]     |
[INFO] [stderr] 240 |         tree
[INFO] [stderr]     |         ^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/numerictree.rs:239:20
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let tree = self.tree_param.learn_tree(self.func, &dataref[..]);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/tree.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         return (a, b);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `(a, b)`
[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/randforest.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         return f64::from(*self);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `f64::from(*self)`
[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/randforest.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         return (sum as f64) / (tree_results.len() as f64);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(sum as f64) / (tree_results.len() as f64)`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/randforest.rs:187:17
[INFO] [stderr]     |
[INFO] [stderr] 187 |                 tree
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/randforest.rs:186:28
[INFO] [stderr]     |
[INFO] [stderr] 186 |                 let tree = self.tree_param.learn_tree(self.learn_function, &subset[..]);
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/numerictree.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         return -(rel * ln!(rel) + (1f64 - rel) * ln!(1f64 - rel));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `-(rel * ln!(rel) + (1f64 - rel) * ln!(1f64 - rel))`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/numerictree.rs:146:9
[INFO] [stderr]     |
[INFO] [stderr] 146 |         res
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/numerictree.rs:143:19
[INFO] [stderr]     |
[INFO] [stderr] 143 |           let res = ((set_l.len() as f64) * self.set_impurity.impurity(set_l) +
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 144 | |                        (set_r.len() as f64) * self.set_impurity.impurity(set_r)) /
[INFO] [stderr] 145 | |             size;
[INFO] [stderr]     | |________________^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/numerictree.rs:158:25
[INFO] [stderr]     |
[INFO] [stderr] 158 |                         res
[INFO] [stderr]     |                         ^^^
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/numerictree.rs:157:35
[INFO] [stderr]     |
[INFO] [stderr] 157 |                         let res = rng.gen_range(self.min_nr, self.max_nr);
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/numerictree.rs:175:9
[INFO] [stderr]     |
[INFO] [stderr] 175 |         return NumericLeafParam { probability: prob };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `NumericLeafParam { probability: prob }`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/numerictree.rs:240:9
[INFO] [stderr]     |
[INFO] [stderr] 240 |         tree
[INFO] [stderr]     |         ^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/numerictree.rs:239:20
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let tree = self.tree_param.learn_tree(self.func, &dataref[..]);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/tree.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |          -> (Vec<(&'a Self::Data, &'a Self::Truth)>, Vec<(&'a Self::Data, &'a Self::Truth)>) {
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `tree::TreeParameters`
[INFO] [stderr]    --> src/tree.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 | /     pub fn new() -> TreeParameters {
[INFO] [stderr] 124 | |         TreeParameters {}
[INFO] [stderr] 125 | |     }
[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] 120 | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused label `'l`
[INFO] [stderr]    --> src/tree.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 | /         'l: loop {
[INFO] [stderr] 159 | |             match *node {
[INFO] [stderr] 160 | |                 Node::Leaf(ref param) => return Some(param),
[INFO] [stderr] 161 | |                 Node::Interior {
[INFO] [stderr] ...   |
[INFO] [stderr] 170 | |             }
[INFO] [stderr] 171 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unused_label)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_label
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/tree.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 | /         if self.root.is_none() {
[INFO] [stderr] 155 | |             return None;
[INFO] [stderr] 156 | |         }
[INFO] [stderr]     | |_________^ help: replace_it_with: `self.root?;`
[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: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/tree.rs:196:21
[INFO] [stderr]     |
[INFO] [stderr] 196 |             assert!(subset.is_empty() == false);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!subset.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/tree.rs:221:25
[INFO] [stderr]     |
[INFO] [stderr] 221 |                 assert!(false == impurity.is_nan());
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!impurity.is_nan()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/numerictree.rs:52:19
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let rel = (abs as f64) / (set.len() as f64);
[INFO] [stderr]    |                   ^^^^^^^^^^^^ help: try: `f64::from(abs)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/numerictree.rs:174:20
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let prob = (truth as f64) / (size as f64);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^ help: try: `f64::from(truth)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/tree.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |          -> (Vec<(&'a Self::Data, &'a Self::Truth)>, Vec<(&'a Self::Data, &'a Self::Truth)>) {
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `tree::TreeParameters`
[INFO] [stderr]    --> src/tree.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 | /     pub fn new() -> TreeParameters {
[INFO] [stderr] 124 | |         TreeParameters {}
[INFO] [stderr] 125 | |     }
[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] 120 | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused label `'l`
[INFO] [stderr]    --> src/tree.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 | /         'l: loop {
[INFO] [stderr] 159 | |             match *node {
[INFO] [stderr] 160 | |                 Node::Leaf(ref param) => return Some(param),
[INFO] [stderr] 161 | |                 Node::Interior {
[INFO] [stderr] ...   |
[INFO] [stderr] 170 | |             }
[INFO] [stderr] 171 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unused_label)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_label
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/tree.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 | /         if self.root.is_none() {
[INFO] [stderr] 155 | |             return None;
[INFO] [stderr] 156 | |         }
[INFO] [stderr]     | |_________^ help: replace_it_with: `self.root?;`
[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: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/tree.rs:196:21
[INFO] [stderr]     |
[INFO] [stderr] 196 |             assert!(subset.is_empty() == false);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!subset.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/tree.rs:221:25
[INFO] [stderr]     |
[INFO] [stderr] 221 |                 assert!(false == impurity.is_nan());
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!impurity.is_nan()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/numerictree.rs:52:19
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let rel = (abs as f64) / (set.len() as f64);
[INFO] [stderr]    |                   ^^^^^^^^^^^^ help: try: `f64::from(abs)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/numerictree.rs:174:20
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let prob = (truth as f64) / (size as f64);
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^ help: try: `f64::from(truth)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> examples/numeric_tree_example.rs:27:18
[INFO] [stderr]    |
[INFO] [stderr] 27 |                 (x as f64, numerictree::NumericTruth::NotInClass)
[INFO] [stderr]    |                  ^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> examples/numeric_tree_example.rs:29:18
[INFO] [stderr]    |
[INFO] [stderr] 29 |                 (x as f64, numerictree::NumericTruth::InClass)
[INFO] [stderr]    |                  ^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.55s
[INFO] running `"docker" "inspect" "ec7005a8514cc71e643cb5581715ce4126ffb91272d57d35bfad1e1b2e066298"`
[INFO] running `"docker" "rm" "-f" "ec7005a8514cc71e643cb5581715ce4126ffb91272d57d35bfad1e1b2e066298"`
[INFO] [stdout] ec7005a8514cc71e643cb5581715ce4126ffb91272d57d35bfad1e1b2e066298