[INFO] crate immutable 0.1.1 is already in cache
[INFO] extracting crate immutable 0.1.1 into work/ex/clippy-test-run/sources/stable/reg/immutable/0.1.1
[INFO] extracting crate immutable 0.1.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/immutable/0.1.1
[INFO] validating manifest of immutable-0.1.1 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 immutable-0.1.1 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 immutable-0.1.1
[INFO] finished frobbing immutable-0.1.1
[INFO] frobbed toml for immutable-0.1.1 written to work/ex/clippy-test-run/sources/stable/reg/immutable/0.1.1/Cargo.toml
[INFO] started frobbing immutable-0.1.1
[INFO] finished frobbing immutable-0.1.1
[INFO] frobbed toml for immutable-0.1.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/immutable/0.1.1/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 immutable-0.1.1 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/reg/immutable/0.1.1:/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] 648d2c6b6f9eea7e49c5e71f588dd7917878dd1821aa8fa67d767b4febed5219
[INFO] running `"docker" "start" "-a" "648d2c6b6f9eea7e49c5e71f588dd7917878dd1821aa8fa67d767b4febed5219"`
[INFO] [stderr]     Checking immutable v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/map.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             key: key,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `key`
[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/map.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 42 |             val: val
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `val`
[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/map.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             key: key,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `key`
[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/map.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 42 |             val: val
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `val`
[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: unused import: `std::vec::IntoIter`
[INFO] [stderr]  --> src/list.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::vec::IntoIter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/tree/binary_tree.rs:353:9
[INFO] [stderr]     |
[INFO] [stderr] 353 |         return Some(node.value());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(node.value())`
[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: unused import: `std::vec::IntoIter`
[INFO] [stderr]  --> src/list.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::vec::IntoIter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/tree/binary_tree.rs:353:9
[INFO] [stderr]     |
[INFO] [stderr] 353 |         return Some(node.value());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(node.value())`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 | /         match self {
[INFO] [stderr] 44 | |             &List::Empty => true,
[INFO] [stderr] 45 | |             &List::Cons(_, _) => false,
[INFO] [stderr] 46 | |         }
[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] 43 |         match *self {
[INFO] [stderr] 44 |             List::Empty => true,
[INFO] [stderr] 45 |             List::Cons(_, _) => false,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 | /         match self {
[INFO] [stderr] 51 | |             &List::Empty => panic!("Head called on empty list"),
[INFO] [stderr] 52 | |             &List::Cons(ref head, _) => head.clone(),
[INFO] [stderr] 53 | |         }
[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] 50 |         match *self {
[INFO] [stderr] 51 |             List::Empty => panic!("Head called on empty list"),
[INFO] [stderr] 52 |             List::Cons(ref head, _) => head.clone(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 | /         match self {
[INFO] [stderr] 58 | |             &List::Empty => panic!("Tail called on empy list"),
[INFO] [stderr] 59 | |             &List::Cons(_, ref tail) => tail.clone(),
[INFO] [stderr] 60 | |         }
[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] 57 |         match *self {
[INFO] [stderr] 58 |             List::Empty => panic!("Tail called on empy list"),
[INFO] [stderr] 59 |             List::Cons(_, ref tail) => tail.clone(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 | /         match self {
[INFO] [stderr] 65 | |             &List::Empty => 0,
[INFO] [stderr] 66 | |             &List::Cons(_, ref tail) => 1 + tail.length(),
[INFO] [stderr] 67 | |         }
[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] 64 |         match *self {
[INFO] [stderr] 65 |             List::Empty => 0,
[INFO] [stderr] 66 |             List::Cons(_, ref tail) => 1 + tail.length(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 | /         match self {
[INFO] [stderr] 71 | |             &List::Empty => lst.borrow().clone(),
[INFO] [stderr] 72 | |             &List::Cons(ref head, ref tail) => List::Cons(head.clone(), tail.append(lst).into()),
[INFO] [stderr] 73 | |         }
[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] 70 |         match *self {
[INFO] [stderr] 71 |             List::Empty => lst.borrow().clone(),
[INFO] [stderr] 72 |             List::Cons(ref head, ref tail) => List::Cons(head.clone(), tail.append(lst).into()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 | /         match self {
[INFO] [stderr] 78 | |             &List::Empty => None,
[INFO] [stderr] 79 | |             &List::Cons(ref head, _) => Some(head.clone()),
[INFO] [stderr] 80 | |         }
[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] 77 |         match *self {
[INFO] [stderr] 78 |             List::Empty => None,
[INFO] [stderr] 79 |             List::Cons(ref head, _) => Some(head.clone()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 | /         match self {
[INFO] [stderr] 85 | |             &List::Empty => None,
[INFO] [stderr] 86 | |             &List::Cons(_, ref tail) => Some(tail.clone()),
[INFO] [stderr] 87 | |         }
[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] 84 |         match *self {
[INFO] [stderr] 85 |             List::Empty => None,
[INFO] [stderr] 86 |             List::Cons(_, ref tail) => Some(tail.clone()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/list.rs:99:9
[INFO] [stderr]     |
[INFO] [stderr] 99  | /         match self {
[INFO] [stderr] 100 | |             &List::Empty => write!(f, ""),
[INFO] [stderr] 101 | |             &List::Cons(ref head, ref tail)  => write!(f, "{:?}, {:?}", head.clone(), tail.clone()),
[INFO] [stderr] 102 | |         }
[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] 99  |         match *self {
[INFO] [stderr] 100 |             List::Empty => write!(f, ""),
[INFO] [stderr] 101 |             List::Cons(ref head, ref tail)  => write!(f, "{:?}, {:?}", head.clone(), tail.clone()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/list.rs:142:9
[INFO] [stderr]     |
[INFO] [stderr] 142 | /         match self.node.deref() {
[INFO] [stderr] 143 | |             &List::Empty => return None,
[INFO] [stderr] 144 | |             &List::Cons(ref head, ref tail) => {
[INFO] [stderr] 145 | |                 tl = tail.clone();
[INFO] [stderr] 146 | |                 hd = head.clone();
[INFO] [stderr] 147 | |             }
[INFO] [stderr] 148 | |         }
[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] 142 |         match *self.node.deref() {
[INFO] [stderr] 143 |             List::Empty => return None,
[INFO] [stderr] 144 |             List::Cons(ref head, ref tail) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/tree/binary_tree.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 | /         match self {
[INFO] [stderr] 65 | |             &BinaryTree::Empty => None,
[INFO] [stderr] 66 | |             &BinaryTree::Node(_, ref value, ref left, ref right) =>
[INFO] [stderr] 67 | |                 if value > &val { left.get(val) }
[INFO] [stderr] 68 | |                 else if value < &val { right.get(val) }
[INFO] [stderr] 69 | |                 else { Some(value.clone()) }
[INFO] [stderr] 70 | |         }
[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] 64 |         match *self {
[INFO] [stderr] 65 |             BinaryTree::Empty => None,
[INFO] [stderr] 66 |             BinaryTree::Node(_, ref value, ref left, ref right) =>
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/tree/binary_tree.rs:67:20
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 if value > &val { left.get(val) }
[INFO] [stderr]    |                    ^^^^^^^^----
[INFO] [stderr]    |                            |
[INFO] [stderr]    |                            help: use the right value directly: `val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/tree/binary_tree.rs:68:25
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 else if value < &val { right.get(val) }
[INFO] [stderr]    |                         ^^^^^^^^----
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: use the right value directly: `val`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/tree/binary_tree.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 | /         match self {
[INFO] [stderr] 79 | |             &BinaryTree::Empty => BinaryTree::node(Color::Red, val, BinaryTree::Empty, BinaryTree::Empty),
[INFO] [stderr] 80 | |             &BinaryTree::Node(color, ref root, ref left, ref right) => {
[INFO] [stderr] 81 | |                 if val > *root { BinaryTree::balance(color, root.clone(), left.deref().clone(), right.ins(val)) }
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |             }
[INFO] [stderr] 85 | |         }
[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] 78 |         match *self {
[INFO] [stderr] 79 |             BinaryTree::Empty => BinaryTree::node(Color::Red, val, BinaryTree::Empty, BinaryTree::Empty),
[INFO] [stderr] 80 |             BinaryTree::Node(color, ref root, ref left, ref right) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 | /         match self {
[INFO] [stderr] 112 | |             &BinaryTree::Empty => BinaryTree::Empty,
[INFO] [stderr] 113 | |             &BinaryTree::Node(ref color, ref root, ref left, ref right) => {
[INFO] [stderr] 114 | |                 if root > val.borrow() {
[INFO] [stderr] ...   |
[INFO] [stderr] 130 | |             }
[INFO] [stderr] 131 | |         }
[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] 111 |         match *self {
[INFO] [stderr] 112 |             BinaryTree::Empty => BinaryTree::Empty,
[INFO] [stderr] 113 |             BinaryTree::Node(ref color, ref root, ref left, ref right) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tree/binary_tree.rs:116:25
[INFO] [stderr]     |
[INFO] [stderr] 116 |                         color.clone(),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^ help: try dereferencing it: `*color`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tree/binary_tree.rs:123:25
[INFO] [stderr]     |
[INFO] [stderr] 123 |                         color.clone(),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^ help: try dereferencing it: `*color`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:225:9
[INFO] [stderr]     |
[INFO] [stderr] 225 | /         match self {
[INFO] [stderr] 226 | |             &BinaryTree::Empty => true,
[INFO] [stderr] 227 | |             &BinaryTree::Node(_, _, _, _) => false,
[INFO] [stderr] 228 | |         }
[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] 225 |         match *self {
[INFO] [stderr] 226 |             BinaryTree::Empty => true,
[INFO] [stderr] 227 |             BinaryTree::Node(_, _, _, _) => false,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 | /         match self {
[INFO] [stderr] 233 | |             &BinaryTree::Empty => false,
[INFO] [stderr] 234 | |             &BinaryTree::Node(_, _, ref left, ref right) => left.is_empty() && right.is_empty(),
[INFO] [stderr] 235 | |         }
[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] 232 |         match *self {
[INFO] [stderr] 233 |             BinaryTree::Empty => false,
[INFO] [stderr] 234 |             BinaryTree::Node(_, _, ref left, ref right) => left.is_empty() && right.is_empty(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:239:9
[INFO] [stderr]     |
[INFO] [stderr] 239 | /         match self {
[INFO] [stderr] 240 | |             &BinaryTree::Empty => panic!("paint() called on empty tree"),
[INFO] [stderr] 241 | |             &BinaryTree::Node(_, ref value, ref left, ref right) => BinaryTree::Node(c, value.clone(), left.clone(), right.clone()),
[INFO] [stderr] 242 | |         }
[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] 239 |         match *self {
[INFO] [stderr] 240 |             BinaryTree::Empty => panic!("paint() called on empty tree"),
[INFO] [stderr] 241 |             BinaryTree::Node(_, ref value, ref left, ref right) => BinaryTree::Node(c, value.clone(), left.clone(), right.clone()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:246:9
[INFO] [stderr]     |
[INFO] [stderr] 246 | /         match self {
[INFO] [stderr] 247 | |             &BinaryTree::Empty => panic!("color() called on empty tree"),
[INFO] [stderr] 248 | |             &BinaryTree::Node(color, _, _, _) => color,
[INFO] [stderr] 249 | |         }
[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] 246 |         match *self {
[INFO] [stderr] 247 |             BinaryTree::Empty => panic!("color() called on empty tree"),
[INFO] [stderr] 248 |             BinaryTree::Node(color, _, _, _) => color,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 | /         match self {
[INFO] [stderr] 253 | |             &BinaryTree::Empty => panic!("value() called on empty tree"),
[INFO] [stderr] 254 | |             &BinaryTree::Node(_, ref value, _, _) => value.clone(),
[INFO] [stderr] 255 | |         }
[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] 252 |         match *self {
[INFO] [stderr] 253 |             BinaryTree::Empty => panic!("value() called on empty tree"),
[INFO] [stderr] 254 |             BinaryTree::Node(_, ref value, _, _) => value.clone(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:258:9
[INFO] [stderr]     |
[INFO] [stderr] 258 | /         match self {
[INFO] [stderr] 259 | |             &BinaryTree::Empty => panic!("left() called on empty tree"),
[INFO] [stderr] 260 | |             &BinaryTree::Node(_, _, ref left, _) => left.clone(),
[INFO] [stderr] 261 | |         }
[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] 258 |         match *self {
[INFO] [stderr] 259 |             BinaryTree::Empty => panic!("left() called on empty tree"),
[INFO] [stderr] 260 |             BinaryTree::Node(_, _, ref left, _) => left.clone(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 | /         match self {
[INFO] [stderr] 265 | |             &BinaryTree::Empty => panic!("right() called on empty tree"),
[INFO] [stderr] 266 | |             &BinaryTree::Node(_, _, _, ref right) => right.clone(),
[INFO] [stderr] 267 | |         }
[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] 264 |         match *self {
[INFO] [stderr] 265 |             BinaryTree::Empty => panic!("right() called on empty tree"),
[INFO] [stderr] 266 |             BinaryTree::Node(_, _, _, ref right) => right.clone(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:270:9
[INFO] [stderr]     |
[INFO] [stderr] 270 | /         match self {
[INFO] [stderr] 271 | |             &BinaryTree::Empty => 0,
[INFO] [stderr] 272 | |             &BinaryTree::Node(_, _, ref left, ref right) => 1 + left.length() + right.length(),
[INFO] [stderr] 273 | |         }
[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] 270 |         match *self {
[INFO] [stderr] 271 |             BinaryTree::Empty => 0,
[INFO] [stderr] 272 |             BinaryTree::Node(_, _, ref left, ref right) => 1 + left.length() + right.length(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:276:9
[INFO] [stderr]     |
[INFO] [stderr] 276 | /         match self {
[INFO] [stderr] 277 | |             &BinaryTree::Empty => 0,
[INFO] [stderr] 278 | |             &BinaryTree::Node(_, _, ref left, ref right) => 1 + max(left.height(), right.height()),
[INFO] [stderr] 279 | |         }
[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] 276 |         match *self {
[INFO] [stderr] 277 |             BinaryTree::Empty => 0,
[INFO] [stderr] 278 |             BinaryTree::Node(_, _, ref left, ref right) => 1 + max(left.height(), right.height()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]    --> src/tree/binary_tree.rs:300:5
[INFO] [stderr]     |
[INFO] [stderr] 300 | /     fn ne(&self, other: &Self) -> bool {
[INFO] [stderr] 301 | |         !(self == other)
[INFO] [stderr] 302 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::partialeq_ne_impl)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 | /         match self {
[INFO] [stderr] 309 | |             &BinaryTree::Empty => write!(f, "Empty"),
[INFO] [stderr] 310 | |             &BinaryTree::Node(ref color, ref value, ref left, ref right) => write!(f, "Node({:?}, {:?}, {:?}, {:?})", color, value.clone(), left.clone(), right.clone()),
[INFO] [stderr] 311 | |         }
[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] 308 |         match *self {
[INFO] [stderr] 309 |             BinaryTree::Empty => write!(f, "Empty"),
[INFO] [stderr] 310 |             BinaryTree::Node(ref color, ref value, ref left, ref right) => write!(f, "Node({:?}, {:?}, {:?}, {:?})", color, value.clone(), left.clone(), right.clone()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]   --> src/map.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn ne(&self, other: &Self) -> bool { self.key != other.key }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]   --> src/map.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn ne(&self, other: &K) -> bool { self.key != *other }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `map::Map<K, V>`
[INFO] [stderr]   --> src/map.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 | /     pub fn new() -> Self {
[INFO] [stderr] 67 | |         Map {
[INFO] [stderr] 68 | |             tree: BinaryTree::empty()
[INFO] [stderr] 69 | |         }
[INFO] [stderr] 70 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 65 | impl Default for map::Map<K, V> {
[INFO] [stderr] 66 |     fn default() -> Self {
[INFO] [stderr] 67 |         Self::new()
[INFO] [stderr] 68 |     }
[INFO] [stderr] 69 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/list.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[macro_escape]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]   --> src/tree/binary_tree.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | #[macro_escape]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 | /         match self {
[INFO] [stderr] 44 | |             &List::Empty => true,
[INFO] [stderr] 45 | |             &List::Cons(_, _) => false,
[INFO] [stderr] 46 | |         }
[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] 43 |         match *self {
[INFO] [stderr] 44 |             List::Empty => true,
[INFO] [stderr] 45 |             List::Cons(_, _) => false,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 | /         match self {
[INFO] [stderr] 51 | |             &List::Empty => panic!("Head called on empty list"),
[INFO] [stderr] 52 | |             &List::Cons(ref head, _) => head.clone(),
[INFO] [stderr] 53 | |         }
[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] 50 |         match *self {
[INFO] [stderr] 51 |             List::Empty => panic!("Head called on empty list"),
[INFO] [stderr] 52 |             List::Cons(ref head, _) => head.clone(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 | /         match self {
[INFO] [stderr] 58 | |             &List::Empty => panic!("Tail called on empy list"),
[INFO] [stderr] 59 | |             &List::Cons(_, ref tail) => tail.clone(),
[INFO] [stderr] 60 | |         }
[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] 57 |         match *self {
[INFO] [stderr] 58 |             List::Empty => panic!("Tail called on empy list"),
[INFO] [stderr] 59 |             List::Cons(_, ref tail) => tail.clone(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 | /         match self {
[INFO] [stderr] 65 | |             &List::Empty => 0,
[INFO] [stderr] 66 | |             &List::Cons(_, ref tail) => 1 + tail.length(),
[INFO] [stderr] 67 | |         }
[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] 64 |         match *self {
[INFO] [stderr] 65 |             List::Empty => 0,
[INFO] [stderr] 66 |             List::Cons(_, ref tail) => 1 + tail.length(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 | /         match self {
[INFO] [stderr] 71 | |             &List::Empty => lst.borrow().clone(),
[INFO] [stderr] 72 | |             &List::Cons(ref head, ref tail) => List::Cons(head.clone(), tail.append(lst).into()),
[INFO] [stderr] 73 | |         }
[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] 70 |         match *self {
[INFO] [stderr] 71 |             List::Empty => lst.borrow().clone(),
[INFO] [stderr] 72 |             List::Cons(ref head, ref tail) => List::Cons(head.clone(), tail.append(lst).into()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 | /         match self {
[INFO] [stderr] 78 | |             &List::Empty => None,
[INFO] [stderr] 79 | |             &List::Cons(ref head, _) => Some(head.clone()),
[INFO] [stderr] 80 | |         }
[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] 77 |         match *self {
[INFO] [stderr] 78 |             List::Empty => None,
[INFO] [stderr] 79 |             List::Cons(ref head, _) => Some(head.clone()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/list.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 | /         match self {
[INFO] [stderr] 85 | |             &List::Empty => None,
[INFO] [stderr] 86 | |             &List::Cons(_, ref tail) => Some(tail.clone()),
[INFO] [stderr] 87 | |         }
[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] 84 |         match *self {
[INFO] [stderr] 85 |             List::Empty => None,
[INFO] [stderr] 86 |             List::Cons(_, ref tail) => Some(tail.clone()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/list.rs:99:9
[INFO] [stderr]     |
[INFO] [stderr] 99  | /         match self {
[INFO] [stderr] 100 | |             &List::Empty => write!(f, ""),
[INFO] [stderr] 101 | |             &List::Cons(ref head, ref tail)  => write!(f, "{:?}, {:?}", head.clone(), tail.clone()),
[INFO] [stderr] 102 | |         }
[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] 99  |         match *self {
[INFO] [stderr] 100 |             List::Empty => write!(f, ""),
[INFO] [stderr] 101 |             List::Cons(ref head, ref tail)  => write!(f, "{:?}, {:?}", head.clone(), tail.clone()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/list.rs:142:9
[INFO] [stderr]     |
[INFO] [stderr] 142 | /         match self.node.deref() {
[INFO] [stderr] 143 | |             &List::Empty => return None,
[INFO] [stderr] 144 | |             &List::Cons(ref head, ref tail) => {
[INFO] [stderr] 145 | |                 tl = tail.clone();
[INFO] [stderr] 146 | |                 hd = head.clone();
[INFO] [stderr] 147 | |             }
[INFO] [stderr] 148 | |         }
[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] 142 |         match *self.node.deref() {
[INFO] [stderr] 143 |             List::Empty => return None,
[INFO] [stderr] 144 |             List::Cons(ref head, ref tail) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/tree/binary_tree.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 | /         match self {
[INFO] [stderr] 65 | |             &BinaryTree::Empty => None,
[INFO] [stderr] 66 | |             &BinaryTree::Node(_, ref value, ref left, ref right) =>
[INFO] [stderr] 67 | |                 if value > &val { left.get(val) }
[INFO] [stderr] 68 | |                 else if value < &val { right.get(val) }
[INFO] [stderr] 69 | |                 else { Some(value.clone()) }
[INFO] [stderr] 70 | |         }
[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] 64 |         match *self {
[INFO] [stderr] 65 |             BinaryTree::Empty => None,
[INFO] [stderr] 66 |             BinaryTree::Node(_, ref value, ref left, ref right) =>
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/tree/binary_tree.rs:67:20
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 if value > &val { left.get(val) }
[INFO] [stderr]    |                    ^^^^^^^^----
[INFO] [stderr]    |                            |
[INFO] [stderr]    |                            help: use the right value directly: `val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/tree/binary_tree.rs:68:25
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 else if value < &val { right.get(val) }
[INFO] [stderr]    |                         ^^^^^^^^----
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: use the right value directly: `val`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/tree/binary_tree.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 | /         match self {
[INFO] [stderr] 79 | |             &BinaryTree::Empty => BinaryTree::node(Color::Red, val, BinaryTree::Empty, BinaryTree::Empty),
[INFO] [stderr] 80 | |             &BinaryTree::Node(color, ref root, ref left, ref right) => {
[INFO] [stderr] 81 | |                 if val > *root { BinaryTree::balance(color, root.clone(), left.deref().clone(), right.ins(val)) }
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |             }
[INFO] [stderr] 85 | |         }
[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] 78 |         match *self {
[INFO] [stderr] 79 |             BinaryTree::Empty => BinaryTree::node(Color::Red, val, BinaryTree::Empty, BinaryTree::Empty),
[INFO] [stderr] 80 |             BinaryTree::Node(color, ref root, ref left, ref right) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 | /         match self {
[INFO] [stderr] 112 | |             &BinaryTree::Empty => BinaryTree::Empty,
[INFO] [stderr] 113 | |             &BinaryTree::Node(ref color, ref root, ref left, ref right) => {
[INFO] [stderr] 114 | |                 if root > val.borrow() {
[INFO] [stderr] ...   |
[INFO] [stderr] 130 | |             }
[INFO] [stderr] 131 | |         }
[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] 111 |         match *self {
[INFO] [stderr] 112 |             BinaryTree::Empty => BinaryTree::Empty,
[INFO] [stderr] 113 |             BinaryTree::Node(ref color, ref root, ref left, ref right) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tree/binary_tree.rs:116:25
[INFO] [stderr]     |
[INFO] [stderr] 116 |                         color.clone(),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^ help: try dereferencing it: `*color`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tree/binary_tree.rs:123:25
[INFO] [stderr]     |
[INFO] [stderr] 123 |                         color.clone(),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^ help: try dereferencing it: `*color`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:225:9
[INFO] [stderr]     |
[INFO] [stderr] 225 | /         match self {
[INFO] [stderr] 226 | |             &BinaryTree::Empty => true,
[INFO] [stderr] 227 | |             &BinaryTree::Node(_, _, _, _) => false,
[INFO] [stderr] 228 | |         }
[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] 225 |         match *self {
[INFO] [stderr] 226 |             BinaryTree::Empty => true,
[INFO] [stderr] 227 |             BinaryTree::Node(_, _, _, _) => false,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 | /         match self {
[INFO] [stderr] 233 | |             &BinaryTree::Empty => false,
[INFO] [stderr] 234 | |             &BinaryTree::Node(_, _, ref left, ref right) => left.is_empty() && right.is_empty(),
[INFO] [stderr] 235 | |         }
[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] 232 |         match *self {
[INFO] [stderr] 233 |             BinaryTree::Empty => false,
[INFO] [stderr] 234 |             BinaryTree::Node(_, _, ref left, ref right) => left.is_empty() && right.is_empty(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:239:9
[INFO] [stderr]     |
[INFO] [stderr] 239 | /         match self {
[INFO] [stderr] 240 | |             &BinaryTree::Empty => panic!("paint() called on empty tree"),
[INFO] [stderr] 241 | |             &BinaryTree::Node(_, ref value, ref left, ref right) => BinaryTree::Node(c, value.clone(), left.clone(), right.clone()),
[INFO] [stderr] 242 | |         }
[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] 239 |         match *self {
[INFO] [stderr] 240 |             BinaryTree::Empty => panic!("paint() called on empty tree"),
[INFO] [stderr] 241 |             BinaryTree::Node(_, ref value, ref left, ref right) => BinaryTree::Node(c, value.clone(), left.clone(), right.clone()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:246:9
[INFO] [stderr]     |
[INFO] [stderr] 246 | /         match self {
[INFO] [stderr] 247 | |             &BinaryTree::Empty => panic!("color() called on empty tree"),
[INFO] [stderr] 248 | |             &BinaryTree::Node(color, _, _, _) => color,
[INFO] [stderr] 249 | |         }
[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] 246 |         match *self {
[INFO] [stderr] 247 |             BinaryTree::Empty => panic!("color() called on empty tree"),
[INFO] [stderr] 248 |             BinaryTree::Node(color, _, _, _) => color,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 | /         match self {
[INFO] [stderr] 253 | |             &BinaryTree::Empty => panic!("value() called on empty tree"),
[INFO] [stderr] 254 | |             &BinaryTree::Node(_, ref value, _, _) => value.clone(),
[INFO] [stderr] 255 | |         }
[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] 252 |         match *self {
[INFO] [stderr] 253 |             BinaryTree::Empty => panic!("value() called on empty tree"),
[INFO] [stderr] 254 |             BinaryTree::Node(_, ref value, _, _) => value.clone(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:258:9
[INFO] [stderr]     |
[INFO] [stderr] 258 | /         match self {
[INFO] [stderr] 259 | |             &BinaryTree::Empty => panic!("left() called on empty tree"),
[INFO] [stderr] 260 | |             &BinaryTree::Node(_, _, ref left, _) => left.clone(),
[INFO] [stderr] 261 | |         }
[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] 258 |         match *self {
[INFO] [stderr] 259 |             BinaryTree::Empty => panic!("left() called on empty tree"),
[INFO] [stderr] 260 |             BinaryTree::Node(_, _, ref left, _) => left.clone(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 | /         match self {
[INFO] [stderr] 265 | |             &BinaryTree::Empty => panic!("right() called on empty tree"),
[INFO] [stderr] 266 | |             &BinaryTree::Node(_, _, _, ref right) => right.clone(),
[INFO] [stderr] 267 | |         }
[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] 264 |         match *self {
[INFO] [stderr] 265 |             BinaryTree::Empty => panic!("right() called on empty tree"),
[INFO] [stderr] 266 |             BinaryTree::Node(_, _, _, ref right) => right.clone(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:270:9
[INFO] [stderr]     |
[INFO] [stderr] 270 | /         match self {
[INFO] [stderr] 271 | |             &BinaryTree::Empty => 0,
[INFO] [stderr] 272 | |             &BinaryTree::Node(_, _, ref left, ref right) => 1 + left.length() + right.length(),
[INFO] [stderr] 273 | |         }
[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] 270 |         match *self {
[INFO] [stderr] 271 |             BinaryTree::Empty => 0,
[INFO] [stderr] 272 |             BinaryTree::Node(_, _, ref left, ref right) => 1 + left.length() + right.length(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:276:9
[INFO] [stderr]     |
[INFO] [stderr] 276 | /         match self {
[INFO] [stderr] 277 | |             &BinaryTree::Empty => 0,
[INFO] [stderr] 278 | |             &BinaryTree::Node(_, _, ref left, ref right) => 1 + max(left.height(), right.height()),
[INFO] [stderr] 279 | |         }
[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] 276 |         match *self {
[INFO] [stderr] 277 |             BinaryTree::Empty => 0,
[INFO] [stderr] 278 |             BinaryTree::Node(_, _, ref left, ref right) => 1 + max(left.height(), right.height()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]    --> src/tree/binary_tree.rs:300:5
[INFO] [stderr]     |
[INFO] [stderr] 300 | /     fn ne(&self, other: &Self) -> bool {
[INFO] [stderr] 301 | |         !(self == other)
[INFO] [stderr] 302 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::partialeq_ne_impl)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/tree/binary_tree.rs:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 | /         match self {
[INFO] [stderr] 309 | |             &BinaryTree::Empty => write!(f, "Empty"),
[INFO] [stderr] 310 | |             &BinaryTree::Node(ref color, ref value, ref left, ref right) => write!(f, "Node({:?}, {:?}, {:?}, {:?})", color, value.clone(), left.clone(), right.clone()),
[INFO] [stderr] 311 | |         }
[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] 308 |         match *self {
[INFO] [stderr] 309 |             BinaryTree::Empty => write!(f, "Empty"),
[INFO] [stderr] 310 |             BinaryTree::Node(ref color, ref value, ref left, ref right) => write!(f, "Node({:?}, {:?}, {:?}, {:?})", color, value.clone(), left.clone(), right.clone()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]   --> src/map.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn ne(&self, other: &Self) -> bool { self.key != other.key }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]   --> src/map.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn ne(&self, other: &K) -> bool { self.key != *other }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `map::Map<K, V>`
[INFO] [stderr]   --> src/map.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 | /     pub fn new() -> Self {
[INFO] [stderr] 67 | |         Map {
[INFO] [stderr] 68 | |             tree: BinaryTree::empty()
[INFO] [stderr] 69 | |         }
[INFO] [stderr] 70 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 65 | impl Default for map::Map<K, V> {
[INFO] [stderr] 66 |     fn default() -> Self {
[INFO] [stderr] 67 |         Self::new()
[INFO] [stderr] 68 |     }
[INFO] [stderr] 69 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/list.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[macro_escape]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]   --> src/tree/binary_tree.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | #[macro_escape]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "648d2c6b6f9eea7e49c5e71f588dd7917878dd1821aa8fa67d767b4febed5219"`
[INFO] running `"docker" "rm" "-f" "648d2c6b6f9eea7e49c5e71f588dd7917878dd1821aa8fa67d767b4febed5219"`
[INFO] [stdout] 648d2c6b6f9eea7e49c5e71f588dd7917878dd1821aa8fa67d767b4febed5219