[INFO] crate immutable-chunkmap 0.5.0 is already in cache
[INFO] extracting crate immutable-chunkmap 0.5.0 into work/ex/clippy-test-run/sources/stable/reg/immutable-chunkmap/0.5.0
[INFO] extracting crate immutable-chunkmap 0.5.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/immutable-chunkmap/0.5.0
[INFO] validating manifest of immutable-chunkmap-0.5.0 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 immutable-chunkmap-0.5.0 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 immutable-chunkmap-0.5.0
[INFO] finished frobbing immutable-chunkmap-0.5.0
[INFO] frobbed toml for immutable-chunkmap-0.5.0 written to work/ex/clippy-test-run/sources/stable/reg/immutable-chunkmap/0.5.0/Cargo.toml
[INFO] started frobbing immutable-chunkmap-0.5.0
[INFO] finished frobbing immutable-chunkmap-0.5.0
[INFO] frobbed toml for immutable-chunkmap-0.5.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/immutable-chunkmap/0.5.0/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 immutable-chunkmap-0.5.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/immutable-chunkmap/0.5.0:/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] 1691ec57c7bac6defa610874cd4409874abcdfb797bc0a164fb78da6e9c1f3f8
[INFO] running `"docker" "start" "-a" "1691ec57c7bac6defa610874cd4409874abcdfb797bc0a164fb78da6e9c1f3f8"`
[INFO] [stderr]     Checking immutable-chunkmap v0.5.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/avl.rs:708:20
[INFO] [stderr]     |
[INFO] [stderr] 708 |                    min_key: min_key,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^ help: replace it with: `min_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/avl.rs:709:20
[INFO] [stderr]     |
[INFO] [stderr] 709 |                    max_key: max_key,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^ help: replace it with: `max_key`
[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: 5th binding whose name is just one char
[INFO] [stderr]    --> src/avl.rs:887:30
[INFO] [stderr]     |
[INFO] [stderr] 887 |                     Some((k, v)) =>
[INFO] [stderr]     |                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/avl.rs:901:30
[INFO] [stderr]     |
[INFO] [stderr] 901 |                         let (l, len, prev) = tn.left.update(len, k, d, f);
[INFO] [stderr]     |                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/avl.rs:905:30
[INFO] [stderr]     |
[INFO] [stderr] 905 |                         let (r, len, prev) = tn.right.update(len, k, d, f);
[INFO] [stderr]     |                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]     --> src/avl.rs:1032:36
[INFO] [stderr]      |
[INFO] [stderr] 1032 |                                 Ok(i) => break Some(f(e, i)),
[INFO] [stderr]      |                                    ^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/map.rs:296:24
[INFO] [stderr]     |
[INFO] [stderr] 296 |         (Map {root: t, len: len}, prev)
[INFO] [stderr]     |                        ^^^^^^^^ help: replace it with: `len`
[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/set.rs:186:24
[INFO] [stderr]     |
[INFO] [stderr] 186 |         (Set {root: t, len: len}, prev.is_some())
[INFO] [stderr]     |                        ^^^^^^^^ help: replace it with: `len`
[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: 5th binding whose name is just one char
[INFO] [stderr]    --> src/tests.rs:367:13
[INFO] [stderr]     |
[INFO] [stderr] 367 |         let j = r.gen_range(0, SIZE - 1);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/avl.rs:708:20
[INFO] [stderr]     |
[INFO] [stderr] 708 |                    min_key: min_key,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^ help: replace it with: `min_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/avl.rs:709:20
[INFO] [stderr]     |
[INFO] [stderr] 709 |                    max_key: max_key,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^ help: replace it with: `max_key`
[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: 5th binding whose name is just one char
[INFO] [stderr]    --> src/avl.rs:887:30
[INFO] [stderr]     |
[INFO] [stderr] 887 |                     Some((k, v)) =>
[INFO] [stderr]     |                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/avl.rs:901:30
[INFO] [stderr]     |
[INFO] [stderr] 901 |                         let (l, len, prev) = tn.left.update(len, k, d, f);
[INFO] [stderr]     |                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/avl.rs:905:30
[INFO] [stderr]     |
[INFO] [stderr] 905 |                         let (r, len, prev) = tn.right.update(len, k, d, f);
[INFO] [stderr]     |                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]     --> src/avl.rs:1032:36
[INFO] [stderr]      |
[INFO] [stderr] 1032 |                                 Ok(i) => break Some(f(e, i)),
[INFO] [stderr]      |                                    ^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/map.rs:296:24
[INFO] [stderr]     |
[INFO] [stderr] 296 |         (Map {root: t, len: len}, prev)
[INFO] [stderr]     |                        ^^^^^^^^ help: replace it with: `len`
[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/set.rs:186:24
[INFO] [stderr]     |
[INFO] [stderr] 186 |         (Set {root: t, len: len}, prev.is_some())
[INFO] [stderr]     |                        ^^^^^^^^ help: replace it with: `len`
[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: Variant name starts with the enum's name
[INFO] [stderr]   --> src/avl.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     UpdateLeft(Q, D),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::enum_variant_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name starts with the enum's name
[INFO] [stderr]   --> src/avl.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     UpdateRight(Q, D),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/avl.rs:197:36
[INFO] [stderr]     |
[INFO] [stderr] 197 |                               } else {
[INFO] [stderr]     |  ____________________________________^
[INFO] [stderr] 198 | |                                 if let Some((k, v)) = f(q, d, None) {
[INFO] [stderr] 199 | |                                     overflow_right.push(
[INFO] [stderr] 200 | |                                         (elts.keys.pop().unwrap(),
[INFO] [stderr] ...   |
[INFO] [stderr] 205 | |                                 }
[INFO] [stderr] 206 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 197 |                             } else if let Some((k, v)) = f(q, d, None) {
[INFO] [stderr] 198 |     overflow_right.push(
[INFO] [stderr] 199 |         (elts.keys.pop().unwrap(),
[INFO] [stderr] 200 |          elts.vals.pop().unwrap())
[INFO] [stderr] 201 |     );
[INFO] [stderr] 202 |     elts.keys.insert(i, k);
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]     --> src/avl.rs:1060:48
[INFO] [stderr]      |
[INFO] [stderr] 1060 |     pub(crate) fn invariant(&self, len: usize) -> () {
[INFO] [stderr]      |                                                ^^^^^ help: remove the `-> ()`
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/map.rs:319:36
[INFO] [stderr]     |
[INFO] [stderr] 319 |     pub(crate) fn invariant(&self) -> () { self.root.invariant(self.len) }
[INFO] [stderr]     |                                    ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/set.rs:210:36
[INFO] [stderr]     |
[INFO] [stderr] 210 |     pub(crate) fn invariant(&self) -> () { self.root.invariant(self.len) }
[INFO] [stderr]     |                                    ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/avl.rs:123:40
[INFO] [stderr]     |
[INFO] [stderr] 123 |         assert!(chunk.len() <= SIZE && chunk.len() > 0);
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!chunk.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/avl.rs:354:5
[INFO] [stderr]     |
[INFO] [stderr] 354 | /     fn min_elt<'a>(&'a self) -> Option<(&'a K, &'a V)> {
[INFO] [stderr] 355 | |         if self.len() == 0 { None }
[INFO] [stderr] 356 | |         else { Some((&self.keys[0], &self.vals[0])) }
[INFO] [stderr] 357 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/avl.rs:359:5
[INFO] [stderr]     |
[INFO] [stderr] 359 | /     fn max_elt<'a>(&'a self) -> Option<(&'a K, &'a V)> {
[INFO] [stderr] 360 | |         if self.len() == 0 { None }
[INFO] [stderr] 361 | |         else {
[INFO] [stderr] 362 | |             let last = self.len() - 1;
[INFO] [stderr] 363 | |             Some((&self.keys[last], &self.vals[last]))
[INFO] [stderr] 364 | |         }
[INFO] [stderr] 365 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]    --> src/avl.rs:386:22
[INFO] [stderr]     |
[INFO] [stderr] 386 |         (&self.keys).into_iter().zip(&self.vals)
[INFO] [stderr]     |                      ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:536:21
[INFO] [stderr]     |
[INFO] [stderr] 536 | /                     match &mut self.elts {
[INFO] [stderr] 537 | |                         &mut None => break,
[INFO] [stderr] 538 | |                         &mut Some(ref mut s) =>
[INFO] [stderr] 539 | |                             match s.next() {
[INFO] [stderr] ...   |
[INFO] [stderr] 542 | |                             }
[INFO] [stderr] 543 | |                     };
[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] 536 |                     match *(&mut self.elts) {
[INFO] [stderr] 537 |                         None => break,
[INFO] [stderr] 538 |                         Some(ref mut s) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:595:21
[INFO] [stderr]     |
[INFO] [stderr] 595 | /                     match &mut self.elts_rev {
[INFO] [stderr] 596 | |                         &mut None => break,
[INFO] [stderr] 597 | |                         &mut Some(ref mut s) =>
[INFO] [stderr] 598 | |                             match s.next_back() {
[INFO] [stderr] ...   |
[INFO] [stderr] 601 | |                             }
[INFO] [stderr] 602 | |                     };
[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] 595 |                     match *(&mut self.elts_rev) {
[INFO] [stderr] 596 |                         None => break,
[INFO] [stderr] 597 |                         Some(ref mut s) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:665:9
[INFO] [stderr]     |
[INFO] [stderr] 665 | /         match self {
[INFO] [stderr] 666 | |             &Tree::Empty =>
[INFO] [stderr] 667 | |                 Iter {
[INFO] [stderr] 668 | |                     lbound, ubound,
[INFO] [stderr] ...   |
[INFO] [stderr] 686 | |             }
[INFO] [stderr] 687 | |         }
[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] 665 |         match *self {
[INFO] [stderr] 666 |             Tree::Empty =>
[INFO] [stderr] 667 |                 Iter {
[INFO] [stderr] 668 |                     lbound, ubound,
[INFO] [stderr] 669 |                     stack: ArrayVec::<[_; MAX_DEPTH]>::new(),
[INFO] [stderr] 670 |                     elts: None, current: None,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:698:9
[INFO] [stderr]     |
[INFO] [stderr] 698 | /         match self {
[INFO] [stderr] 699 | |             &Tree::Empty => 0,
[INFO] [stderr] 700 | |             &Tree::Node(ref n) => n.height
[INFO] [stderr] 701 | |         }
[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] 698 |         match *self {
[INFO] [stderr] 699 |             Tree::Empty => 0,
[INFO] [stderr] 700 |             Tree::Node(ref n) => n.height
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/avl.rs:770:12
[INFO] [stderr]     |
[INFO] [stderr] 770 |         if chunk.len() == 0 { return (self.clone(), len) }
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `chunk.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:771:9
[INFO] [stderr]     |
[INFO] [stderr] 771 | /         match self {
[INFO] [stderr] 772 | |             &Tree::Empty => {
[INFO] [stderr] 773 | |                 let (elts, len) = {
[INFO] [stderr] 774 | |                     let t = Elts::empty();
[INFO] [stderr] ...   |
[INFO] [stderr] 823 | |             }
[INFO] [stderr] 824 | |         }
[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] 771 |         match *self {
[INFO] [stderr] 772 |             Tree::Empty => {
[INFO] [stderr] 773 |                 let (elts, len) = {
[INFO] [stderr] 774 |                     let t = Elts::empty();
[INFO] [stderr] 775 |                     match t.update_chunk(chunk, len, true, f) {
[INFO] [stderr] 776 |                         UpdateChunk::Created {elts, len} => (elts, len),
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:883:9
[INFO] [stderr]     |
[INFO] [stderr] 883 | /         match self {
[INFO] [stderr] 884 | |             &Tree::Empty =>
[INFO] [stderr] 885 | |                 match f(q, d, None) {
[INFO] [stderr] 886 | |                     None => (self.clone(), len, None),
[INFO] [stderr] ...   |
[INFO] [stderr] 932 | |             }
[INFO] [stderr] 933 | |         }
[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] 883 |         match *self {
[INFO] [stderr] 884 |             Tree::Empty =>
[INFO] [stderr] 885 |                 match f(q, d, None) {
[INFO] [stderr] 886 |                     None => (self.clone(), len, None),
[INFO] [stderr] 887 |                     Some((k, v)) =>
[INFO] [stderr] 888 |                         (Tree::create(
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:943:9
[INFO] [stderr]     |
[INFO] [stderr] 943 | /         match self {
[INFO] [stderr] 944 | |             &Tree::Empty => None,
[INFO] [stderr] 945 | |             &Tree::Node(ref tn) =>
[INFO] [stderr] 946 | |                 match tn.left {
[INFO] [stderr] ...   |
[INFO] [stderr] 949 | |                 }
[INFO] [stderr] 950 | |         }
[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] 943 |         match *self {
[INFO] [stderr] 944 |             Tree::Empty => None,
[INFO] [stderr] 945 |             Tree::Node(ref tn) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:954:9
[INFO] [stderr]     |
[INFO] [stderr] 954 | /         match self {
[INFO] [stderr] 955 | |             &Tree::Empty => panic!("remove min elt"),
[INFO] [stderr] 956 | |             &Tree::Node(ref tn) =>
[INFO] [stderr] 957 | |                 match tn.left {
[INFO] [stderr] ...   |
[INFO] [stderr] 961 | |                 }
[INFO] [stderr] 962 | |         }
[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] 954 |         match *self {
[INFO] [stderr] 955 |             Tree::Empty => panic!("remove min elt"),
[INFO] [stderr] 956 |             Tree::Node(ref tn) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]     --> src/avl.rs:979:9
[INFO] [stderr]      |
[INFO] [stderr] 979  | /         match self {
[INFO] [stderr] 980  | |             &Tree::Empty => (Tree::Empty, len, None),
[INFO] [stderr] 981  | |             &Tree::Node(ref tn) =>
[INFO] [stderr] 982  | |                 match tn.elts.get(k) {
[INFO] [stderr] ...    |
[INFO] [stderr] 1003 | |                 }
[INFO] [stderr] 1004 | |         }
[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] 979  |         match *self {
[INFO] [stderr] 980  |             Tree::Empty => (Tree::Empty, len, None),
[INFO] [stderr] 981  |             Tree::Node(ref tn) =>
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]     --> src/avl.rs:1013:9
[INFO] [stderr]      |
[INFO] [stderr] 1013 | /         match self {
[INFO] [stderr] 1014 | |             &Tree::Empty => None,
[INFO] [stderr] 1015 | |             &Tree::Node(ref n) => {
[INFO] [stderr] 1016 | |                 let mut tn = n;
[INFO] [stderr] ...    |
[INFO] [stderr] 1038 | |             }
[INFO] [stderr] 1039 | |         }
[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] 1013 |         match *self {
[INFO] [stderr] 1014 |             Tree::Empty => None,
[INFO] [stderr] 1015 |             Tree::Node(ref n) => {
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]     --> src/avl.rs:1068:34
[INFO] [stderr]      |
[INFO] [stderr] 1068 |                     (&elts.keys).into_iter().all(|k| {
[INFO] [stderr]      |                                  ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]     --> src/avl.rs:1074:34
[INFO] [stderr]      |
[INFO] [stderr] 1074 |                     (&elts.keys).into_iter().all(|k| {
[INFO] [stderr]      |                                  ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name starts with the enum's name
[INFO] [stderr]   --> src/avl.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     UpdateLeft(Q, D),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::enum_variant_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: Variant name starts with the enum's name
[INFO] [stderr]   --> src/avl.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     UpdateRight(Q, D),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/avl.rs:197:36
[INFO] [stderr]     |
[INFO] [stderr] 197 |                               } else {
[INFO] [stderr]     |  ____________________________________^
[INFO] [stderr] 198 | |                                 if let Some((k, v)) = f(q, d, None) {
[INFO] [stderr] 199 | |                                     overflow_right.push(
[INFO] [stderr] 200 | |                                         (elts.keys.pop().unwrap(),
[INFO] [stderr] ...   |
[INFO] [stderr] 205 | |                                 }
[INFO] [stderr] 206 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 197 |                             } else if let Some((k, v)) = f(q, d, None) {
[INFO] [stderr] 198 |     overflow_right.push(
[INFO] [stderr] 199 |         (elts.keys.pop().unwrap(),
[INFO] [stderr] 200 |          elts.vals.pop().unwrap())
[INFO] [stderr] 201 |     );
[INFO] [stderr] 202 |     elts.keys.insert(i, k);
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: item `map::Map<K, V>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/map.rs:159:1
[INFO] [stderr]     |
[INFO] [stderr] 159 | / impl<K, V> Map<K, V> where K: Ord + Clone, V: Clone {
[INFO] [stderr] 160 | |     /// Create a new empty map
[INFO] [stderr] 161 | |     pub fn new() -> Self { Map { len: 0, root: Tree::new() } }
[INFO] [stderr] 162 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 314 | |     }
[INFO] [stderr] 315 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]     --> src/avl.rs:1060:48
[INFO] [stderr]      |
[INFO] [stderr] 1060 |     pub(crate) fn invariant(&self, len: usize) -> () {
[INFO] [stderr]      |                                                ^^^^^ help: remove the `-> ()`
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/map.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 | /     pub fn range<'a, Q>(
[INFO] [stderr] 311 | |         &'a self, lbound: Bound<Q>, ubound: Bound<Q>
[INFO] [stderr] 312 | |     ) -> Iter<'a, Q, K, V> where Q: Ord, K: Borrow<Q> {
[INFO] [stderr] 313 | |         self.root.range(lbound, ubound)
[INFO] [stderr] 314 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/map.rs:319:36
[INFO] [stderr]     |
[INFO] [stderr] 319 |     pub(crate) fn invariant(&self) -> () { self.root.invariant(self.len) }
[INFO] [stderr]     |                                    ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/set.rs:210:36
[INFO] [stderr]     |
[INFO] [stderr] 210 |     pub(crate) fn invariant(&self) -> () { self.root.invariant(self.len) }
[INFO] [stderr]     |                                    ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/tests.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 | const SIZE: usize = 500000;
[INFO] [stderr]    |                     ^^^^^^ help: consider: `500_000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit expression
[INFO] [stderr]   --> src/tests.rs:82:35
[INFO] [stderr]    |
[INFO] [stderr] 82 |     insert(randvec::<i32>(SIZE)); ()
[INFO] [stderr]    |                                   ^^ help: remove the final `()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: item `set::Set<K>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/set.rs:97:1
[INFO] [stderr]     |
[INFO] [stderr] 97  | / impl<K> Set<K> where K: Ord + Clone {
[INFO] [stderr] 98  | |     /// Create a new empty set
[INFO] [stderr] 99  | |     pub fn new() -> Self { Set { len: 0, root: Tree::new() } }
[INFO] [stderr] 100 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 205 | |     }
[INFO] [stderr] 206 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/avl.rs:123:40
[INFO] [stderr]     |
[INFO] [stderr] 123 |         assert!(chunk.len() <= SIZE && chunk.len() > 0);
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!chunk.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/avl.rs:354:5
[INFO] [stderr]     |
[INFO] [stderr] 354 | /     fn min_elt<'a>(&'a self) -> Option<(&'a K, &'a V)> {
[INFO] [stderr] 355 | |         if self.len() == 0 { None }
[INFO] [stderr] 356 | |         else { Some((&self.keys[0], &self.vals[0])) }
[INFO] [stderr] 357 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/avl.rs:359:5
[INFO] [stderr]     |
[INFO] [stderr] 359 | /     fn max_elt<'a>(&'a self) -> Option<(&'a K, &'a V)> {
[INFO] [stderr] 360 | |         if self.len() == 0 { None }
[INFO] [stderr] 361 | |         else {
[INFO] [stderr] 362 | |             let last = self.len() - 1;
[INFO] [stderr] 363 | |             Some((&self.keys[last], &self.vals[last]))
[INFO] [stderr] 364 | |         }
[INFO] [stderr] 365 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]    --> src/avl.rs:386:22
[INFO] [stderr]     |
[INFO] [stderr] 386 |         (&self.keys).into_iter().zip(&self.vals)
[INFO] [stderr]     |                      ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:536:21
[INFO] [stderr]     |
[INFO] [stderr] 536 | /                     match &mut self.elts {
[INFO] [stderr] 537 | |                         &mut None => break,
[INFO] [stderr] 538 | |                         &mut Some(ref mut s) =>
[INFO] [stderr] 539 | |                             match s.next() {
[INFO] [stderr] ...   |
[INFO] [stderr] 542 | |                             }
[INFO] [stderr] 543 | |                     };
[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] 536 |                     match *(&mut self.elts) {
[INFO] [stderr] 537 |                         None => break,
[INFO] [stderr] 538 |                         Some(ref mut s) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:595:21
[INFO] [stderr]     |
[INFO] [stderr] 595 | /                     match &mut self.elts_rev {
[INFO] [stderr] 596 | |                         &mut None => break,
[INFO] [stderr] 597 | |                         &mut Some(ref mut s) =>
[INFO] [stderr] 598 | |                             match s.next_back() {
[INFO] [stderr] ...   |
[INFO] [stderr] 601 | |                             }
[INFO] [stderr] 602 | |                     };
[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] 595 |                     match *(&mut self.elts_rev) {
[INFO] [stderr] 596 |                         None => break,
[INFO] [stderr] 597 |                         Some(ref mut s) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:665:9
[INFO] [stderr]     |
[INFO] [stderr] 665 | /         match self {
[INFO] [stderr] 666 | |             &Tree::Empty =>
[INFO] [stderr] 667 | |                 Iter {
[INFO] [stderr] 668 | |                     lbound, ubound,
[INFO] [stderr] ...   |
[INFO] [stderr] 686 | |             }
[INFO] [stderr] 687 | |         }
[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] 665 |         match *self {
[INFO] [stderr] 666 |             Tree::Empty =>
[INFO] [stderr] 667 |                 Iter {
[INFO] [stderr] 668 |                     lbound, ubound,
[INFO] [stderr] 669 |                     stack: ArrayVec::<[_; MAX_DEPTH]>::new(),
[INFO] [stderr] 670 |                     elts: None, current: None,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:698:9
[INFO] [stderr]     |
[INFO] [stderr] 698 | /         match self {
[INFO] [stderr] 699 | |             &Tree::Empty => 0,
[INFO] [stderr] 700 | |             &Tree::Node(ref n) => n.height
[INFO] [stderr] 701 | |         }
[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] 698 |         match *self {
[INFO] [stderr] 699 |             Tree::Empty => 0,
[INFO] [stderr] 700 |             Tree::Node(ref n) => n.height
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/avl.rs:770:12
[INFO] [stderr]     |
[INFO] [stderr] 770 |         if chunk.len() == 0 { return (self.clone(), len) }
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `chunk.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:771:9
[INFO] [stderr]     |
[INFO] [stderr] 771 | /         match self {
[INFO] [stderr] 772 | |             &Tree::Empty => {
[INFO] [stderr] 773 | |                 let (elts, len) = {
[INFO] [stderr] 774 | |                     let t = Elts::empty();
[INFO] [stderr] ...   |
[INFO] [stderr] 823 | |             }
[INFO] [stderr] 824 | |         }
[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] 771 |         match *self {
[INFO] [stderr] 772 |             Tree::Empty => {
[INFO] [stderr] 773 |                 let (elts, len) = {
[INFO] [stderr] 774 |                     let t = Elts::empty();
[INFO] [stderr] 775 |                     match t.update_chunk(chunk, len, true, f) {
[INFO] [stderr] 776 |                         UpdateChunk::Created {elts, len} => (elts, len),
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:883:9
[INFO] [stderr]     |
[INFO] [stderr] 883 | /         match self {
[INFO] [stderr] 884 | |             &Tree::Empty =>
[INFO] [stderr] 885 | |                 match f(q, d, None) {
[INFO] [stderr] 886 | |                     None => (self.clone(), len, None),
[INFO] [stderr] ...   |
[INFO] [stderr] 932 | |             }
[INFO] [stderr] 933 | |         }
[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] 883 |         match *self {
[INFO] [stderr] 884 |             Tree::Empty =>
[INFO] [stderr] 885 |                 match f(q, d, None) {
[INFO] [stderr] 886 |                     None => (self.clone(), len, None),
[INFO] [stderr] 887 |                     Some((k, v)) =>
[INFO] [stderr] 888 |                         (Tree::create(
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:943:9
[INFO] [stderr]     |
[INFO] [stderr] 943 | /         match self {
[INFO] [stderr] 944 | |             &Tree::Empty => None,
[INFO] [stderr] 945 | |             &Tree::Node(ref tn) =>
[INFO] [stderr] 946 | |                 match tn.left {
[INFO] [stderr] ...   |
[INFO] [stderr] 949 | |                 }
[INFO] [stderr] 950 | |         }
[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] 943 |         match *self {
[INFO] [stderr] 944 |             Tree::Empty => None,
[INFO] [stderr] 945 |             Tree::Node(ref tn) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/avl.rs:954:9
[INFO] [stderr]     |
[INFO] [stderr] 954 | /         match self {
[INFO] [stderr] 955 | |             &Tree::Empty => panic!("remove min elt"),
[INFO] [stderr] 956 | |             &Tree::Node(ref tn) =>
[INFO] [stderr] 957 | |                 match tn.left {
[INFO] [stderr] ...   |
[INFO] [stderr] 961 | |                 }
[INFO] [stderr] 962 | |         }
[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] 954 |         match *self {
[INFO] [stderr] 955 |             Tree::Empty => panic!("remove min elt"),
[INFO] [stderr] 956 |             Tree::Node(ref tn) =>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]     --> src/avl.rs:979:9
[INFO] [stderr]      |
[INFO] [stderr] 979  | /         match self {
[INFO] [stderr] 980  | |             &Tree::Empty => (Tree::Empty, len, None),
[INFO] [stderr] 981  | |             &Tree::Node(ref tn) =>
[INFO] [stderr] 982  | |                 match tn.elts.get(k) {
[INFO] [stderr] ...    |
[INFO] [stderr] 1003 | |                 }
[INFO] [stderr] 1004 | |         }
[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] 979  |         match *self {
[INFO] [stderr] 980  |             Tree::Empty => (Tree::Empty, len, None),
[INFO] [stderr] 981  |             Tree::Node(ref tn) =>
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]     --> src/avl.rs:1013:9
[INFO] [stderr]      |
[INFO] [stderr] 1013 | /         match self {
[INFO] [stderr] 1014 | |             &Tree::Empty => None,
[INFO] [stderr] 1015 | |             &Tree::Node(ref n) => {
[INFO] [stderr] 1016 | |                 let mut tn = n;
[INFO] [stderr] ...    |
[INFO] [stderr] 1038 | |             }
[INFO] [stderr] 1039 | |         }
[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] 1013 |         match *self {
[INFO] [stderr] 1014 |             Tree::Empty => None,
[INFO] [stderr] 1015 |             Tree::Node(ref n) => {
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]     --> src/avl.rs:1068:34
[INFO] [stderr]      |
[INFO] [stderr] 1068 |                     (&elts.keys).into_iter().all(|k| {
[INFO] [stderr]      |                                  ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]     --> src/avl.rs:1074:34
[INFO] [stderr]      |
[INFO] [stderr] 1074 |                     (&elts.keys).into_iter().all(|k| {
[INFO] [stderr]      |                                  ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: item `map::Map<K, V>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/map.rs:159:1
[INFO] [stderr]     |
[INFO] [stderr] 159 | / impl<K, V> Map<K, V> where K: Ord + Clone, V: Clone {
[INFO] [stderr] 160 | |     /// Create a new empty map
[INFO] [stderr] 161 | |     pub fn new() -> Self { Map { len: 0, root: Tree::new() } }
[INFO] [stderr] 162 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 314 | |     }
[INFO] [stderr] 315 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/map.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 | /     pub fn range<'a, Q>(
[INFO] [stderr] 311 | |         &'a self, lbound: Bound<Q>, ubound: Bound<Q>
[INFO] [stderr] 312 | |     ) -> Iter<'a, Q, K, V> where Q: Ord, K: Borrow<Q> {
[INFO] [stderr] 313 | |         self.root.range(lbound, ubound)
[INFO] [stderr] 314 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: item `set::Set<K>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/set.rs:97:1
[INFO] [stderr]     |
[INFO] [stderr] 97  | / impl<K> Set<K> where K: Ord + Clone {
[INFO] [stderr] 98  | |     /// Create a new empty set
[INFO] [stderr] 99  | |     pub fn new() -> Self { Set { len: 0, root: Tree::new() } }
[INFO] [stderr] 100 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 205 | |     }
[INFO] [stderr] 206 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/tests.rs:49:29
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn permutation<T: Clone>(v: &Vec<T>) -> Vec<T> {
[INFO] [stderr]    |                             ^^^^^^^ help: change this to: `&[T]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tests.rs:146:49
[INFO] [stderr]     |
[INFO] [stderr] 146 |     t = t.0.insert_many(t.1, v2.iter().map(|k| (k.clone(), k.clone())));
[INFO] [stderr]     |                                                 ^^^^^^^^^ help: try dereferencing it: `*k`
[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/tests.rs:146:60
[INFO] [stderr]     |
[INFO] [stderr] 146 |     t = t.0.insert_many(t.1, v2.iter().map(|k| (k.clone(), k.clone())));
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: try dereferencing it: `*k`
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/tests.rs:180:13
[INFO] [stderr]     |
[INFO] [stderr] 180 |             i = i + 1;
[INFO] [stderr]     |             ^^^^^^^^^ help: replace it with: `i += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/tests.rs:189:13
[INFO] [stderr]     |
[INFO] [stderr] 189 |             i = i + 1;
[INFO] [stderr]     |             ^^^^^^^^^ help: replace it with: `i += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: the variable `i` is used as a loop counter. Consider using `for (i, item) in &v.enumerate()` or similar iterators
[INFO] [stderr]    --> src/tests.rs:198:18
[INFO] [stderr]     |
[INFO] [stderr] 198 |         for k in &v {
[INFO] [stderr]     |                  ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/tests.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         i = i + 1;
[INFO] [stderr]     |         ^^^^^^^^^ help: replace it with: `i += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/tests.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |         i = i + 1;
[INFO] [stderr]     |         ^^^^^^^^^ help: replace it with: `i += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/tests.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 |         i = i + 1;
[INFO] [stderr]     |         ^^^^^^^^^ help: replace it with: `i += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 36
[INFO] [stderr]    --> src/tests.rs:275:1
[INFO] [stderr]     |
[INFO] [stderr] 275 | / fn test_map_range_small() {
[INFO] [stderr] 276 | |     let mut v = Vec::new();
[INFO] [stderr] 277 | |     v.extend((-5000..5000).into_iter());
[INFO] [stderr] 278 | |     let t = Map::new().insert_many(v.iter().map(|x| (*x, *x)));
[INFO] [stderr] ...   |
[INFO] [stderr] 354 | |     }
[INFO] [stderr] 355 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/tests.rs:277:14
[INFO] [stderr]     |
[INFO] [stderr] 277 |     v.extend((-5000..5000).into_iter());
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(-5000..5000)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `j` is only used to index `v`.
[INFO] [stderr]    --> src/tests.rs:442:22
[INFO] [stderr]     |
[INFO] [stderr] 442 |             for j in 0..i {
[INFO] [stderr]     |                      ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 442 |             for <item> in v.iter().take(i) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `j` is only used to index `v`.
[INFO] [stderr]    --> src/tests.rs:455:22
[INFO] [stderr]     |
[INFO] [stderr] 455 |             for j in 0..i {
[INFO] [stderr]     |                      ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 455 |             for <item> in v.iter().take(i) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `j` is only used to index `v`.
[INFO] [stderr]    --> src/tests.rs:458:22
[INFO] [stderr]     |
[INFO] [stderr] 458 |             for j in (i+1)..v.len() {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 458 |             for <item> in v.iter().skip((i+1)) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/tests.rs:481:14
[INFO] [stderr]     |
[INFO] [stderr] 481 |     let s0 = v0.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `v0.iter().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tests.rs:481:32
[INFO] [stderr]     |
[INFO] [stderr] 481 |     let s0 = v0.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |                                ^^^^^^^^^ help: try dereferencing it: `*v`
[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 are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/tests.rs:482:14
[INFO] [stderr]     |
[INFO] [stderr] 482 |     let s1 = v1.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `v1.iter().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tests.rs:482:32
[INFO] [stderr]     |
[INFO] [stderr] 482 |     let s1 = v1.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |                                ^^^^^^^^^ help: try dereferencing it: `*v`
[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 are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/tests.rs:483:14
[INFO] [stderr]     |
[INFO] [stderr] 483 |     let s2 = v2.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `v2.iter().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tests.rs:483:32
[INFO] [stderr]     |
[INFO] [stderr] 483 |     let s2 = v2.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |                                ^^^^^^^^^ help: try dereferencing it: `*v`
[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 are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/tests.rs:484:14
[INFO] [stderr]     |
[INFO] [stderr] 484 |     let s3 = v3.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `v3.iter().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tests.rs:484:32
[INFO] [stderr]     |
[INFO] [stderr] 484 |     let s3 = v3.iter().map(|v| v.clone()).collect::<Set<_>>();
[INFO] [stderr]     |                                ^^^^^^^^^ help: try dereferencing it: `*v`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.81s
[INFO] running `"docker" "inspect" "1691ec57c7bac6defa610874cd4409874abcdfb797bc0a164fb78da6e9c1f3f8"`
[INFO] running `"docker" "rm" "-f" "1691ec57c7bac6defa610874cd4409874abcdfb797bc0a164fb78da6e9c1f3f8"`
[INFO] [stdout] 1691ec57c7bac6defa610874cd4409874abcdfb797bc0a164fb78da6e9c1f3f8