[INFO] crate intmap 0.4.0 is already in cache
[INFO] extracting crate intmap 0.4.0 into work/ex/clippy-test-run/sources/stable/reg/intmap/0.4.0
[INFO] extracting crate intmap 0.4.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/intmap/0.4.0
[INFO] validating manifest of intmap-0.4.0 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 intmap-0.4.0 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 intmap-0.4.0
[INFO] finished frobbing intmap-0.4.0
[INFO] frobbed toml for intmap-0.4.0 written to work/ex/clippy-test-run/sources/stable/reg/intmap/0.4.0/Cargo.toml
[INFO] started frobbing intmap-0.4.0
[INFO] finished frobbing intmap-0.4.0
[INFO] frobbed toml for intmap-0.4.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/intmap/0.4.0/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 intmap-0.4.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/intmap/0.4.0:/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] 7200b68a002f3350b326cfe2c0e92c982b3a89e62dcfd8dfedc47fbd184d782f
[INFO] running `"docker" "start" "-a" "7200b68a002f3350b326cfe2c0e92c982b3a89e62dcfd8dfedc47fbd184d782f"`
[INFO] [stderr]     Checking intmap v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:430:13
[INFO] [stderr]     |
[INFO] [stderr] 430 |             outer: outer,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `outer`
[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/lib.rs:431:13
[INFO] [stderr]     |
[INFO] [stderr] 431 |             inner: inner,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `inner`
[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/lib.rs:471:13
[INFO] [stderr]     |
[INFO] [stderr] 471 |             outer: outer,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `outer`
[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/lib.rs:472:13
[INFO] [stderr]     |
[INFO] [stderr] 472 |             inner: inner,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `inner`
[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/lib.rs:430:13
[INFO] [stderr]     |
[INFO] [stderr] 430 |             outer: outer,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `outer`
[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/lib.rs:431:13
[INFO] [stderr]     |
[INFO] [stderr] 431 |             inner: inner,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `inner`
[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/lib.rs:471:13
[INFO] [stderr]     |
[INFO] [stderr] 471 |             outer: outer,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `outer`
[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/lib.rs:472:13
[INFO] [stderr]     |
[INFO] [stderr] 472 |             inner: inner,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `inner`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:153:13
[INFO] [stderr]     |
[INFO] [stderr] 153 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:191:13
[INFO] [stderr]     |
[INFO] [stderr] 191 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:194:13
[INFO] [stderr]     |
[INFO] [stderr] 194 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/lib.rs:280:9
[INFO] [stderr]     |
[INFO] [stderr] 280 |         val
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/lib.rs:279:19
[INFO] [stderr]     |
[INFO] [stderr] 279 |         let val = a.wrapping_mul(seed);
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:278:17
[INFO] [stderr]     |
[INFO] [stderr] 278 |         let a = 11400714819323198549u64;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ help: consider: `11_400_714_819_323_198_549u64`
[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 return statement
[INFO] [stderr]    --> src/lib.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:153:13
[INFO] [stderr]     |
[INFO] [stderr] 153 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:191:13
[INFO] [stderr]     |
[INFO] [stderr] 191 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:194:13
[INFO] [stderr]     |
[INFO] [stderr] 194 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/lib.rs:280:9
[INFO] [stderr]     |
[INFO] [stderr] 280 |         val
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/lib.rs:279:19
[INFO] [stderr]     |
[INFO] [stderr] 279 |         let val = a.wrapping_mul(seed);
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:278:17
[INFO] [stderr]     |
[INFO] [stderr] 278 |         let a = 11400714819323198549u64;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ help: consider: `11_400_714_819_323_198_549u64`
[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: you should consider deriving a `Default` implementation for `IntMap<V>`
[INFO] [stderr]   --> src/lib.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | /     pub fn new() -> Self {
[INFO] [stderr] 30 | |         IntMap::with_capacity(4)
[INFO] [stderr] 31 | |     }
[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] 10 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/lib.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let ref mut vals = self.cache[ix];
[INFO] [stderr]    |         ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/lib.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |         for ref kv in vals.iter() {
[INFO] [stderr]    |             ^^^^^^    ----------- help: try: `let kv = &vals.iter();`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |         let ref vals = self.cache[ix];
[INFO] [stderr]     |         ----^^^^^^^^------------------ help: try: `let vals = &self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:107:12
[INFO] [stderr]     |
[INFO] [stderr] 107 |         if vals.len() > 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:144:13
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let ref mut vals = self.cache[ix];
[INFO] [stderr]     |         ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:146:12
[INFO] [stderr]     |
[INFO] [stderr] 146 |         if vals.len() > 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:177:13
[INFO] [stderr]     |
[INFO] [stderr] 177 |         let ref mut vals = self.cache[ix];
[INFO] [stderr]     |         ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:179:12
[INFO] [stderr]     |
[INFO] [stderr] 179 |         if vals.len() > 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/lib.rs:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 | /         match self.get(key) {
[INFO] [stderr] 211 | |             Some(_) => true,
[INFO] [stderr] 212 | |             None    => false
[INFO] [stderr] 213 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.get(key).is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:250:21
[INFO] [stderr]     |
[INFO] [stderr] 250 |     pub fn is_empty(&mut self) -> bool {
[INFO] [stderr]     |                     ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/lib.rs:257:17
[INFO] [stderr]     |
[INFO] [stderr] 257 |     pub fn iter<'a>(&self) -> Iter<u64, V> {
[INFO] [stderr]     |                 ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/lib.rs:269:21
[INFO] [stderr]     |
[INFO] [stderr] 269 |     pub fn iter_mut<'a>(&mut self) -> IterMut<u64, V> {
[INFO] [stderr]     |                     ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:310:15
[INFO] [stderr]     |
[INFO] [stderr] 310 |         while vec.len() > 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vec.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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:312:19
[INFO] [stderr]     |
[INFO] [stderr] 312 |             while values.len() > 0 {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!values.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:316:25
[INFO] [stderr]     |
[INFO] [stderr] 316 |                     let ref mut vals = self.cache[ix];
[INFO] [stderr]     |                     ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:346:16
[INFO] [stderr]     |
[INFO] [stderr] 346 |             if self.cache[i].len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!self.cache[i].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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/lib.rs:423:21
[INFO] [stderr]     |
[INFO] [stderr] 423 |     pub fn new(vec: &'a Vec<Vec<(K, V)>>) -> Self {
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<(K, V)>]`
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 | /             match self.inner.next() {
[INFO] [stderr] 443 | |                 Some(r) => return Some((&r.0, &r.1)),
[INFO] [stderr] 444 | |                 None => (),
[INFO] [stderr] 445 | |             }
[INFO] [stderr]     | |_____________^ help: try this: `if let Some(r) = self.inner.next() { return Some((&r.0, &r.1)) }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:484:13
[INFO] [stderr]     |
[INFO] [stderr] 484 | /             match self.inner.next() {
[INFO] [stderr] 485 | |                 Some(r) => return Some((&r.0, &mut r.1)),
[INFO] [stderr] 486 | |                 None => (),
[INFO] [stderr] 487 | |             }
[INFO] [stderr]     | |_____________^ help: try this: `if let Some(r) = self.inner.next() { return Some((&r.0, &mut r.1)) }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `IntMap<V>`
[INFO] [stderr]   --> src/lib.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | /     pub fn new() -> Self {
[INFO] [stderr] 30 | |         IntMap::with_capacity(4)
[INFO] [stderr] 31 | |     }
[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] 10 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/lib.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let ref mut vals = self.cache[ix];
[INFO] [stderr]    |         ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/lib.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |         for ref kv in vals.iter() {
[INFO] [stderr]    |             ^^^^^^    ----------- help: try: `let kv = &vals.iter();`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |         let ref vals = self.cache[ix];
[INFO] [stderr]     |         ----^^^^^^^^------------------ help: try: `let vals = &self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:107:12
[INFO] [stderr]     |
[INFO] [stderr] 107 |         if vals.len() > 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:144:13
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let ref mut vals = self.cache[ix];
[INFO] [stderr]     |         ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:146:12
[INFO] [stderr]     |
[INFO] [stderr] 146 |         if vals.len() > 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:177:13
[INFO] [stderr]     |
[INFO] [stderr] 177 |         let ref mut vals = self.cache[ix];
[INFO] [stderr]     |         ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:179:12
[INFO] [stderr]     |
[INFO] [stderr] 179 |         if vals.len() > 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/lib.rs:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 | /         match self.get(key) {
[INFO] [stderr] 211 | |             Some(_) => true,
[INFO] [stderr] 212 | |             None    => false
[INFO] [stderr] 213 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.get(key).is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:250:21
[INFO] [stderr]     |
[INFO] [stderr] 250 |     pub fn is_empty(&mut self) -> bool {
[INFO] [stderr]     |                     ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/lib.rs:257:17
[INFO] [stderr]     |
[INFO] [stderr] 257 |     pub fn iter<'a>(&self) -> Iter<u64, V> {
[INFO] [stderr]     |                 ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/lib.rs:269:21
[INFO] [stderr]     |
[INFO] [stderr] 269 |     pub fn iter_mut<'a>(&mut self) -> IterMut<u64, V> {
[INFO] [stderr]     |                     ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:310:15
[INFO] [stderr]     |
[INFO] [stderr] 310 |         while vec.len() > 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vec.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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:312:19
[INFO] [stderr]     |
[INFO] [stderr] 312 |             while values.len() > 0 {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!values.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:316:25
[INFO] [stderr]     |
[INFO] [stderr] 316 |                     let ref mut vals = self.cache[ix];
[INFO] [stderr]     |                     ----^^^^^^^^^^^^------------------ help: try: `let vals = &mut self.cache[ix];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:346:16
[INFO] [stderr]     |
[INFO] [stderr] 346 |             if self.cache[i].len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!self.cache[i].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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/lib.rs:423:21
[INFO] [stderr]     |
[INFO] [stderr] 423 |     pub fn new(vec: &'a Vec<Vec<(K, V)>>) -> Self {
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<(K, V)>]`
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 | /             match self.inner.next() {
[INFO] [stderr] 443 | |                 Some(r) => return Some((&r.0, &r.1)),
[INFO] [stderr] 444 | |                 None => (),
[INFO] [stderr] 445 | |             }
[INFO] [stderr]     | |_____________^ help: try this: `if let Some(r) = self.inner.next() { return Some((&r.0, &r.1)) }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:484:13
[INFO] [stderr]     |
[INFO] [stderr] 484 | /             match self.inner.next() {
[INFO] [stderr] 485 | |                 Some(r) => return Some((&r.0, &mut r.1)),
[INFO] [stderr] 486 | |                 None => (),
[INFO] [stderr] 487 | |             }
[INFO] [stderr]     | |_____________^ help: try this: `if let Some(r) = self.inner.next() { return Some((&r.0, &mut r.1)) }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> tests/basic_test.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         println!("");
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/basic_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 `intmap`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7200b68a002f3350b326cfe2c0e92c982b3a89e62dcfd8dfedc47fbd184d782f"`
[INFO] running `"docker" "rm" "-f" "7200b68a002f3350b326cfe2c0e92c982b3a89e62dcfd8dfedc47fbd184d782f"`
[INFO] [stdout] 7200b68a002f3350b326cfe2c0e92c982b3a89e62dcfd8dfedc47fbd184d782f