[INFO] crate david-set 0.1.2 is already in cache
[INFO] extracting crate david-set 0.1.2 into work/ex/clippy-test-run/sources/stable/reg/david-set/0.1.2
[INFO] extracting crate david-set 0.1.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/david-set/0.1.2
[INFO] validating manifest of david-set-0.1.2 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 david-set-0.1.2 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 david-set-0.1.2
[INFO] finished frobbing david-set-0.1.2
[INFO] frobbed toml for david-set-0.1.2 written to work/ex/clippy-test-run/sources/stable/reg/david-set/0.1.2/Cargo.toml
[INFO] started frobbing david-set-0.1.2
[INFO] finished frobbing david-set-0.1.2
[INFO] frobbed toml for david-set-0.1.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/david-set/0.1.2/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 david-set-0.1.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/david-set/0.1.2:/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] 0779360482f5c70e65c4a988a47bb496bcdfacbe4237ae1a109b81c7a0dd63db
[INFO] running `"docker" "start" "-a" "0779360482f5c70e65c4a988a47bb496bcdfacbe4237ae1a109b81c7a0dd63db"`
[INFO] [stderr]     Checking david-set v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/castset.rs:289:20
[INFO] [stderr]     |
[INFO] [stderr] 289 |         IntoIter { set: set, nleft: sz }
[INFO] [stderr]     |                    ^^^^^^^^ help: replace it with: `set`
[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/castset.rs:289:20
[INFO] [stderr]     |
[INFO] [stderr] 289 |         IntoIter { set: set, nleft: sz }
[INFO] [stderr]     |                    ^^^^^^^^ help: replace it with: `set`
[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: operator precedence can trip the unwary
[INFO] [stderr]    --> src/castset.rs:239:21
[INFO] [stderr]     |
[INFO] [stderr] 239 |             let i = h+dist & mask;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(h+dist) & mask`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::precedence)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/castset.rs:262:21
[INFO] [stderr]     |
[INFO] [stderr] 262 |             let i = h+dist & mask;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(h+dist) & mask`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: item `vecset::VecSet<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]   --> src/vecset.rs:8:1
[INFO] [stderr]    |
[INFO] [stderr] 8  | / impl<T: Eq> VecSet<T> {
[INFO] [stderr] 9  | |     /// Creates an empty set..
[INFO] [stderr] 10 | |     pub fn new() -> VecSet<T> {
[INFO] [stderr] 11 | |         VecSet { v: Vec::new() }
[INFO] [stderr] ...  |
[INFO] [stderr] 58 | |     }
[INFO] [stderr] 59 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `vecset::VecSet<T>`
[INFO] [stderr]   --> src/vecset.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | /     pub fn new() -> VecSet<T> {
[INFO] [stderr] 11 | |         VecSet { v: Vec::new() }
[INFO] [stderr] 12 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 7  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: item `copyset::Set<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/copyset.rs:51:1
[INFO] [stderr]     |
[INFO] [stderr] 51  | / impl<T: Copy+Eq+Hash> Set<T> {
[INFO] [stderr] 52  | |     /// Creates an empty set..
[INFO] [stderr] 53  | |     pub fn new() -> Set<T> {
[INFO] [stderr] 54  | |         Set { inner: SS::Small(0, unsafe { std::mem::uninitialized() }) }
[INFO] [stderr] ...   |
[INFO] [stderr] 194 | |     }
[INFO] [stderr] 195 | | }
[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: you should consider adding a `Default` implementation for `copyset::Set<T>`
[INFO] [stderr]   --> src/copyset.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 | /     pub fn new() -> Set<T> {
[INFO] [stderr] 54 | |         Set { inner: SS::Small(0, unsafe { std::mem::uninitialized() }) }
[INFO] [stderr] 55 | |     }
[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] 51 | impl Default for copyset::Set<T> {
[INFO] [stderr] 52 |     fn default() -> Self {
[INFO] [stderr] 53 |         Self::new()
[INFO] [stderr] 54 |     }
[INFO] [stderr] 55 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]   --> src/copyset.rs:82:26
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 for i in 0..len {
[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] 82 |                 for <item> in arr.iter().take(len) {
[INFO] [stderr]    |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]    --> src/copyset.rs:100:26
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 for i in 0 .. *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] 100 |                 for <item> in arr.iter().take(*len) {
[INFO] [stderr]     |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]    --> src/copyset.rs:116:26
[INFO] [stderr]     |
[INFO] [stderr] 116 |                 for i in 0..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] 116 |                 for <item> in arr.iter().take(len) {
[INFO] [stderr]     |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]    --> src/copyset.rs:156:26
[INFO] [stderr]     |
[INFO] [stderr] 156 |                 for i in 0 .. 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] 156 |                 for <item> in arr.iter().take(len) {
[INFO] [stderr]     |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/castset.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         match self {
[INFO] [stderr] 70 | |             &Data::Sm(_,_) => {
[INFO] [stderr] 71 | |                 Data::<T>::cutoff()
[INFO] [stderr] 72 | |             },
[INFO] [stderr] 73 | |             &Data::V(_,ref v) => v.len(),
[INFO] [stderr] 74 | |         }
[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] 69 |         match *self {
[INFO] [stderr] 70 |             Data::Sm(_,_) => {
[INFO] [stderr] 71 |                 Data::<T>::cutoff()
[INFO] [stderr] 72 |             },
[INFO] [stderr] 73 |             Data::V(_,ref v) => v.len(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/castset.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 | /         match self {
[INFO] [stderr] 78 | |             &Data::Sm(_,ref v) => {
[INFO] [stderr] 79 | |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 80 | |                 match num {
[INFO] [stderr] ...  |
[INFO] [stderr] 89 | |             &Data::V(_,ref v) => v,
[INFO] [stderr] 90 | |         }
[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 |             Data::Sm(_,ref v) => {
[INFO] [stderr] 79 |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 80 |                 match num {
[INFO] [stderr] 81 |                     1 => unsafe { std::mem::transmute::<&[usize;2],&[T;1]>(v) },
[INFO] [stderr] 82 |                     2 => unsafe { std::mem::transmute::<&[usize;2],&[T;2]>(v) },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:81:35
[INFO] [stderr]    |
[INFO] [stderr] 81 |                     1 => unsafe { std::mem::transmute::<&[usize;2],&[T;1]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 1])`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:82:35
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     2 => unsafe { std::mem::transmute::<&[usize;2],&[T;2]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 2])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:83:35
[INFO] [stderr]    |
[INFO] [stderr] 83 |                     4 => unsafe { std::mem::transmute::<&[usize;2],&[T;4]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 4])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:84:35
[INFO] [stderr]    |
[INFO] [stderr] 84 |                     8 => unsafe { std::mem::transmute::<&[usize;2],&[T;8]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 8])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:85:36
[INFO] [stderr]    |
[INFO] [stderr] 85 |                     16 => unsafe { std::mem::transmute::<&[usize;2],&[T;16]>(v) },
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 16])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/castset.rs:93:9
[INFO] [stderr]     |
[INFO] [stderr] 93  | /         match self {
[INFO] [stderr] 94  | |             &mut Data::Sm(_,ref mut v) => {
[INFO] [stderr] 95  | |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 96  | |                 match num {
[INFO] [stderr] ...   |
[INFO] [stderr] 105 | |             &mut Data::V(_,ref mut v) => v,
[INFO] [stderr] 106 | |         }
[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] 93  |         match *self {
[INFO] [stderr] 94  |             Data::Sm(_,ref mut v) => {
[INFO] [stderr] 95  |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 96  |                 match num {
[INFO] [stderr] 97  |                     1 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;1]>(v) },
[INFO] [stderr] 98  |                     2 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;2]>(v) },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:97:35
[INFO] [stderr]    |
[INFO] [stderr] 97 |                     1 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;1]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 1])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:98:35
[INFO] [stderr]    |
[INFO] [stderr] 98 |                     2 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;2]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 2])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:99:35
[INFO] [stderr]    |
[INFO] [stderr] 99 |                     4 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;4]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 4])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/castset.rs:100:35
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     8 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;8]>(v) },
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 8])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/castset.rs:101:36
[INFO] [stderr]     |
[INFO] [stderr] 101 |                     16 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;16]>(v) },
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 16])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: item `castset::CastSet<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/castset.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | / impl<T: Cast> CastSet<T> {
[INFO] [stderr] 115 | |     fn mut_sz(&mut self) -> &mut u32 {
[INFO] [stderr] 116 | |         match &mut self.v {
[INFO] [stderr] 117 | |             &mut Data::Sm(ref mut sz,_) => sz,
[INFO] [stderr] ...   |
[INFO] [stderr] 290 | |     }
[INFO] [stderr] 291 | | }
[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: you should consider adding a `Default` implementation for `castset::CastSet<T>`
[INFO] [stderr]    --> src/castset.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | /     pub fn new() -> CastSet<T> {
[INFO] [stderr] 123 | |         CastSet::with_capacity(0)
[INFO] [stderr] 124 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[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] 114 | impl Default for castset::CastSet<T> {
[INFO] [stderr] 115 |     fn default() -> Self {
[INFO] [stderr] 116 |         Self::new()
[INFO] [stderr] 117 |     }
[INFO] [stderr] 118 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/castset.rs:116:9
[INFO] [stderr]     |
[INFO] [stderr] 116 | /         match &mut self.v {
[INFO] [stderr] 117 | |             &mut Data::Sm(ref mut sz,_) => sz,
[INFO] [stderr] 118 | |             &mut Data::V(ref mut sz,_) => sz,
[INFO] [stderr] 119 | |         }
[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] 116 |         match *(&mut self.v) {
[INFO] [stderr] 117 |             Data::Sm(ref mut sz,_) => sz,
[INFO] [stderr] 118 |             Data::V(ref mut sz,_) => sz,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/castset.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 | /         match &self.v {
[INFO] [stderr] 139 | |             &Data::Sm(sz,_) => sz as usize,
[INFO] [stderr] 140 | |             &Data::V(sz,_) => sz as usize,
[INFO] [stderr] 141 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 138 |         match self.v {
[INFO] [stderr] 139 |             Data::Sm(sz,_) => sz as usize,
[INFO] [stderr] 140 |             Data::V(sz,_) => sz as usize,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/castset.rs:239:21
[INFO] [stderr]     |
[INFO] [stderr] 239 |             let i = h+dist & mask;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(h+dist) & mask`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::precedence)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/castset.rs:262:21
[INFO] [stderr]     |
[INFO] [stderr] 262 |             let i = h+dist & mask;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(h+dist) & mask`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/bench.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `david-set`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: item `vecset::VecSet<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]   --> src/vecset.rs:8:1
[INFO] [stderr]    |
[INFO] [stderr] 8  | / impl<T: Eq> VecSet<T> {
[INFO] [stderr] 9  | |     /// Creates an empty set..
[INFO] [stderr] 10 | |     pub fn new() -> VecSet<T> {
[INFO] [stderr] 11 | |         VecSet { v: Vec::new() }
[INFO] [stderr] ...  |
[INFO] [stderr] 58 | |     }
[INFO] [stderr] 59 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `vecset::VecSet<T>`
[INFO] [stderr]   --> src/vecset.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | /     pub fn new() -> VecSet<T> {
[INFO] [stderr] 11 | |         VecSet { v: Vec::new() }
[INFO] [stderr] 12 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 7  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: item `copyset::Set<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/copyset.rs:51:1
[INFO] [stderr]     |
[INFO] [stderr] 51  | / impl<T: Copy+Eq+Hash> Set<T> {
[INFO] [stderr] 52  | |     /// Creates an empty set..
[INFO] [stderr] 53  | |     pub fn new() -> Set<T> {
[INFO] [stderr] 54  | |         Set { inner: SS::Small(0, unsafe { std::mem::uninitialized() }) }
[INFO] [stderr] ...   |
[INFO] [stderr] 194 | |     }
[INFO] [stderr] 195 | | }
[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: you should consider adding a `Default` implementation for `copyset::Set<T>`
[INFO] [stderr]   --> src/copyset.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 | /     pub fn new() -> Set<T> {
[INFO] [stderr] 54 | |         Set { inner: SS::Small(0, unsafe { std::mem::uninitialized() }) }
[INFO] [stderr] 55 | |     }
[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] 51 | impl Default for copyset::Set<T> {
[INFO] [stderr] 52 |     fn default() -> Self {
[INFO] [stderr] 53 |         Self::new()
[INFO] [stderr] 54 |     }
[INFO] [stderr] 55 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]   --> src/copyset.rs:82:26
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 for i in 0..len {
[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] 82 |                 for <item> in arr.iter().take(len) {
[INFO] [stderr]    |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]    --> src/copyset.rs:100:26
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 for i in 0 .. *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] 100 |                 for <item> in arr.iter().take(*len) {
[INFO] [stderr]     |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]    --> src/copyset.rs:116:26
[INFO] [stderr]     |
[INFO] [stderr] 116 |                 for i in 0..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] 116 |                 for <item> in arr.iter().take(len) {
[INFO] [stderr]     |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `arr`.
[INFO] [stderr]    --> src/copyset.rs:156:26
[INFO] [stderr]     |
[INFO] [stderr] 156 |                 for i in 0 .. 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] 156 |                 for <item> in arr.iter().take(len) {
[INFO] [stderr]     |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/castset.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         match self {
[INFO] [stderr] 70 | |             &Data::Sm(_,_) => {
[INFO] [stderr] 71 | |                 Data::<T>::cutoff()
[INFO] [stderr] 72 | |             },
[INFO] [stderr] 73 | |             &Data::V(_,ref v) => v.len(),
[INFO] [stderr] 74 | |         }
[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] 69 |         match *self {
[INFO] [stderr] 70 |             Data::Sm(_,_) => {
[INFO] [stderr] 71 |                 Data::<T>::cutoff()
[INFO] [stderr] 72 |             },
[INFO] [stderr] 73 |             Data::V(_,ref v) => v.len(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/castset.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 | /         match self {
[INFO] [stderr] 78 | |             &Data::Sm(_,ref v) => {
[INFO] [stderr] 79 | |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 80 | |                 match num {
[INFO] [stderr] ...  |
[INFO] [stderr] 89 | |             &Data::V(_,ref v) => v,
[INFO] [stderr] 90 | |         }
[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 |             Data::Sm(_,ref v) => {
[INFO] [stderr] 79 |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 80 |                 match num {
[INFO] [stderr] 81 |                     1 => unsafe { std::mem::transmute::<&[usize;2],&[T;1]>(v) },
[INFO] [stderr] 82 |                     2 => unsafe { std::mem::transmute::<&[usize;2],&[T;2]>(v) },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:81:35
[INFO] [stderr]    |
[INFO] [stderr] 81 |                     1 => unsafe { std::mem::transmute::<&[usize;2],&[T;1]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 1])`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:82:35
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     2 => unsafe { std::mem::transmute::<&[usize;2],&[T;2]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 2])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:83:35
[INFO] [stderr]    |
[INFO] [stderr] 83 |                     4 => unsafe { std::mem::transmute::<&[usize;2],&[T;4]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 4])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:84:35
[INFO] [stderr]    |
[INFO] [stderr] 84 |                     8 => unsafe { std::mem::transmute::<&[usize;2],&[T;8]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 8])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:85:36
[INFO] [stderr]    |
[INFO] [stderr] 85 |                     16 => unsafe { std::mem::transmute::<&[usize;2],&[T;16]>(v) },
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(v as *const [usize; 2] as *const [T; 16])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/castset.rs:93:9
[INFO] [stderr]     |
[INFO] [stderr] 93  | /         match self {
[INFO] [stderr] 94  | |             &mut Data::Sm(_,ref mut v) => {
[INFO] [stderr] 95  | |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 96  | |                 match num {
[INFO] [stderr] ...   |
[INFO] [stderr] 105 | |             &mut Data::V(_,ref mut v) => v,
[INFO] [stderr] 106 | |         }
[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] 93  |         match *self {
[INFO] [stderr] 94  |             Data::Sm(_,ref mut v) => {
[INFO] [stderr] 95  |                 let num = Data::<T>::cutoff();
[INFO] [stderr] 96  |                 match num {
[INFO] [stderr] 97  |                     1 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;1]>(v) },
[INFO] [stderr] 98  |                     2 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;2]>(v) },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:97:35
[INFO] [stderr]    |
[INFO] [stderr] 97 |                     1 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;1]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 1])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:98:35
[INFO] [stderr]    |
[INFO] [stderr] 98 |                     2 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;2]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 2])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]   --> src/castset.rs:99:35
[INFO] [stderr]    |
[INFO] [stderr] 99 |                     4 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;4]>(v) },
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 4])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/castset.rs:100:35
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     8 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;8]>(v) },
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 8])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/castset.rs:101:36
[INFO] [stderr]     |
[INFO] [stderr] 101 |                     16 => unsafe { std::mem::transmute::<&mut [usize;2],&mut [T;16]>(v) },
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(v as *mut [usize; 2] as *mut [T; 16])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: item `castset::CastSet<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/castset.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | / impl<T: Cast> CastSet<T> {
[INFO] [stderr] 115 | |     fn mut_sz(&mut self) -> &mut u32 {
[INFO] [stderr] 116 | |         match &mut self.v {
[INFO] [stderr] 117 | |             &mut Data::Sm(ref mut sz,_) => sz,
[INFO] [stderr] ...   |
[INFO] [stderr] 290 | |     }
[INFO] [stderr] 291 | | }
[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: you should consider adding a `Default` implementation for `castset::CastSet<T>`
[INFO] [stderr]    --> src/castset.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | /     pub fn new() -> CastSet<T> {
[INFO] [stderr] 123 | |         CastSet::with_capacity(0)
[INFO] [stderr] 124 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[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] 114 | impl Default for castset::CastSet<T> {
[INFO] [stderr] 115 |     fn default() -> Self {
[INFO] [stderr] 116 |         Self::new()
[INFO] [stderr] 117 |     }
[INFO] [stderr] 118 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/castset.rs:116:9
[INFO] [stderr]     |
[INFO] [stderr] 116 | /         match &mut self.v {
[INFO] [stderr] 117 | |             &mut Data::Sm(ref mut sz,_) => sz,
[INFO] [stderr] 118 | |             &mut Data::V(ref mut sz,_) => sz,
[INFO] [stderr] 119 | |         }
[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] 116 |         match *(&mut self.v) {
[INFO] [stderr] 117 |             Data::Sm(ref mut sz,_) => sz,
[INFO] [stderr] 118 |             Data::V(ref mut sz,_) => sz,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/castset.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 | /         match &self.v {
[INFO] [stderr] 139 | |             &Data::Sm(sz,_) => sz as usize,
[INFO] [stderr] 140 | |             &Data::V(sz,_) => sz as usize,
[INFO] [stderr] 141 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 138 |         match self.v {
[INFO] [stderr] 139 |             Data::Sm(sz,_) => sz as usize,
[INFO] [stderr] 140 |             Data::V(sz,_) => sz as usize,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0779360482f5c70e65c4a988a47bb496bcdfacbe4237ae1a109b81c7a0dd63db"`
[INFO] running `"docker" "rm" "-f" "0779360482f5c70e65c4a988a47bb496bcdfacbe4237ae1a109b81c7a0dd63db"`
[INFO] [stdout] 0779360482f5c70e65c4a988a47bb496bcdfacbe4237ae1a109b81c7a0dd63db