[INFO] crate redfa 0.0.2 is already in cache
[INFO] extracting crate redfa 0.0.2 into work/ex/clippy-test-run/sources/stable/reg/redfa/0.0.2
[INFO] extracting crate redfa 0.0.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/redfa/0.0.2
[INFO] validating manifest of redfa-0.0.2 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 redfa-0.0.2 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 redfa-0.0.2
[INFO] finished frobbing redfa-0.0.2
[INFO] frobbed toml for redfa-0.0.2 written to work/ex/clippy-test-run/sources/stable/reg/redfa/0.0.2/Cargo.toml
[INFO] started frobbing redfa-0.0.2
[INFO] finished frobbing redfa-0.0.2
[INFO] frobbed toml for redfa-0.0.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/redfa/0.0.2/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 redfa-0.0.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/redfa/0.0.2:/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] c6286009780f7c221282ce8bcbf2948e28f9009f556d03f6585d9fac78e8bcea
[INFO] running `"docker" "start" "-a" "c6286009780f7c221282ce8bcbf2948e28f9009f556d03f6585d9fac78e8bcea"`
[INFO] [stderr]     Checking redfa v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/regex.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |             f: f,
[INFO] [stderr]    |             ^^^^ help: replace it with: `f`
[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/regex.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |             f: f,
[INFO] [stderr]    |             ^^^^ help: replace it with: `f`
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/dfa.rs:74:17
[INFO] [stderr]    |
[INFO] [stderr] 74 |                 by_char: by_char,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^ help: replace it with: `by_char`
[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/dfa.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 default: default,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^ help: replace it with: `default`
[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/dfa.rs:249:17
[INFO] [stderr]     |
[INFO] [stderr] 249 |                 default: default,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: replace it with: `default`
[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/dfa.rs:264:15
[INFO] [stderr]     |
[INFO] [stderr] 264 |         Dfa { states: states }
[INFO] [stderr]     |               ^^^^^^^^^^^^^^ help: replace it with: `states`
[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]    |
[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/dfa.rs:74:17
[INFO] [stderr]    |
[INFO] [stderr] 74 |                 by_char: by_char,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^ help: replace it with: `by_char`
[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/dfa.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 default: default,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^ help: replace it with: `default`
[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/dfa.rs:249:17
[INFO] [stderr]     |
[INFO] [stderr] 249 |                 default: default,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: replace it with: `default`
[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/dfa.rs:264:15
[INFO] [stderr]     |
[INFO] [stderr] 264 |         Dfa { states: states }
[INFO] [stderr]     |               ^^^^^^^^^^^^^^ help: replace it with: `states`
[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/dfa.rs:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |         return true;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[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/dfa.rs:320:9
[INFO] [stderr]     |
[INFO] [stderr] 320 |         return self.minimize() == other.minimize();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.minimize() == other.minimize()`
[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/dfa.rs:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |         return true;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[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/dfa.rs:320:9
[INFO] [stderr]     |
[INFO] [stderr] 320 |         return self.minimize() == other.minimize();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.minimize() == other.minimize()`
[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: length comparison to zero
[INFO] [stderr]    --> src/regex.rs:165:40
[INFO] [stderr]     |
[INFO] [stderr] 165 |                     Except(ref chs) if chs.len() == 0 => not_null,
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `chs.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: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/regex.rs:245:32
[INFO] [stderr]     |
[INFO] [stderr] 245 |                           if let None = self.it.peek() {
[INFO] [stderr]     |  _________________________-      ^^^^
[INFO] [stderr] 246 | |                             return Err(ParseError::UnexpectedEof("unterminated range"));
[INFO] [stderr] 247 | |                         }
[INFO] [stderr]     | |_________________________- help: try this: `if self.it.peek().is_none()`
[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: an inclusive range would be more readable
[INFO] [stderr]    --> src/regex.rs:250:34
[INFO] [stderr]     |
[INFO] [stderr] 250 |                         for x in (c as u64)..(d as u64 + 1) {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `((c as u64)..=d as u64)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/regex.rs:354:9
[INFO] [stderr]     |
[INFO] [stderr] 354 | /         loop {
[INFO] [stderr] 355 | |             match self.it.peek() {
[INFO] [stderr] 356 | |                 Some(&'&') => {
[INFO] [stderr] 357 | |                     self.it.next();
[INFO] [stderr] ...   |
[INFO] [stderr] 361 | |             }
[INFO] [stderr] 362 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(&'&') = self.it.peek() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/regex.rs:367:9
[INFO] [stderr]     |
[INFO] [stderr] 367 | /         loop {
[INFO] [stderr] 368 | |             match self.it.peek() {
[INFO] [stderr] 369 | |                 Some(&'|') => {
[INFO] [stderr] 370 | |                     self.it.next();
[INFO] [stderr] ...   |
[INFO] [stderr] 374 | |             }
[INFO] [stderr] 375 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(&'|') = self.it.peek() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/derivatives.rs:173:16
[INFO] [stderr]     |
[INFO] [stderr] 173 |             if v.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `v.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/derivatives.rs:178:12
[INFO] [stderr]     |
[INFO] [stderr] 178 |         if v.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `v.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/derivatives.rs:219:20
[INFO] [stderr]     |
[INFO] [stderr] 219 |                 if cs.len() == 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cs.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/derivatives.rs:226:52
[INFO] [stderr]     |
[INFO] [stderr] 226 |                 let mut ds = Vec::with_capacity(if cs.len() > 0 { 1 } else { 0 } + xs.len());
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!cs.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/derivatives.rs:227:20
[INFO] [stderr]     |
[INFO] [stderr] 227 |                 if cs.len() > 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!cs.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: the loop variable `i` is only used to index `xs`.
[INFO] [stderr]    --> src/derivatives.rs:240:26
[INFO] [stderr]     |
[INFO] [stderr] 240 |                 for i in 0..xs.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] 240 |                 for <item> in &xs {
[INFO] [stderr]     |                     ^^^^^^    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/dfa.rs:96:30
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn reverse(&self) -> Vec<(BTreeMap<&T, BTreeSet<usize> >, BTreeSet<usize>)>
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: in an 'if' condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a 'let'
[INFO] [stderr]    --> src/dfa.rs:255:84
[INFO] [stderr]     |
[INFO] [stderr] 255 |           debug_assert!(partitions.iter().zip(states.iter()).all(|(part, new_state)| {
[INFO] [stderr]     |  ____________________________________________________________________________________^
[INFO] [stderr] 256 | |             part.iter().all(|&state_ix| {
[INFO] [stderr] 257 | |                 let state = &self.states[state_ix];
[INFO] [stderr] 258 | |                 state.by_char.iter().all(|(key, &to)| partition[&(to as usize)] == new_state.by_char.get(key).cloned().unwrap_or(new_state.default))
[INFO] [stderr] ...   |
[INFO] [stderr] 261 | |             })
[INFO] [stderr] 262 | |         }));
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::block_in_if_condition_stmt)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#block_in_if_condition_stmt
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/regex.rs:165:40
[INFO] [stderr]     |
[INFO] [stderr] 165 |                     Except(ref chs) if chs.len() == 0 => not_null,
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `chs.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: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/regex.rs:245:32
[INFO] [stderr]     |
[INFO] [stderr] 245 |                           if let None = self.it.peek() {
[INFO] [stderr]     |  _________________________-      ^^^^
[INFO] [stderr] 246 | |                             return Err(ParseError::UnexpectedEof("unterminated range"));
[INFO] [stderr] 247 | |                         }
[INFO] [stderr]     | |_________________________- help: try this: `if self.it.peek().is_none()`
[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: an inclusive range would be more readable
[INFO] [stderr]    --> src/regex.rs:250:34
[INFO] [stderr]     |
[INFO] [stderr] 250 |                         for x in (c as u64)..(d as u64 + 1) {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `((c as u64)..=d as u64)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/regex.rs:354:9
[INFO] [stderr]     |
[INFO] [stderr] 354 | /         loop {
[INFO] [stderr] 355 | |             match self.it.peek() {
[INFO] [stderr] 356 | |                 Some(&'&') => {
[INFO] [stderr] 357 | |                     self.it.next();
[INFO] [stderr] ...   |
[INFO] [stderr] 361 | |             }
[INFO] [stderr] 362 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(&'&') = self.it.peek() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/regex.rs:367:9
[INFO] [stderr]     |
[INFO] [stderr] 367 | /         loop {
[INFO] [stderr] 368 | |             match self.it.peek() {
[INFO] [stderr] 369 | |                 Some(&'|') => {
[INFO] [stderr] 370 | |                     self.it.next();
[INFO] [stderr] ...   |
[INFO] [stderr] 374 | |             }
[INFO] [stderr] 375 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(&'|') = self.it.peek() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/derivatives.rs:173:16
[INFO] [stderr]     |
[INFO] [stderr] 173 |             if v.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `v.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/derivatives.rs:178:12
[INFO] [stderr]     |
[INFO] [stderr] 178 |         if v.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `v.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/derivatives.rs:219:20
[INFO] [stderr]     |
[INFO] [stderr] 219 |                 if cs.len() == 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cs.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/derivatives.rs:226:52
[INFO] [stderr]     |
[INFO] [stderr] 226 |                 let mut ds = Vec::with_capacity(if cs.len() > 0 { 1 } else { 0 } + xs.len());
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!cs.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/derivatives.rs:227:20
[INFO] [stderr]     |
[INFO] [stderr] 227 |                 if cs.len() > 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!cs.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: the loop variable `i` is only used to index `xs`.
[INFO] [stderr]    --> src/derivatives.rs:240:26
[INFO] [stderr]     |
[INFO] [stderr] 240 |                 for i in 0..xs.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] 240 |                 for <item> in &xs {
[INFO] [stderr]     |                     ^^^^^^    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/dfa.rs:96:30
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn reverse(&self) -> Vec<(BTreeMap<&T, BTreeSet<usize> >, BTreeSet<usize>)>
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: in an 'if' condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a 'let'
[INFO] [stderr]    --> src/dfa.rs:255:84
[INFO] [stderr]     |
[INFO] [stderr] 255 |           debug_assert!(partitions.iter().zip(states.iter()).all(|(part, new_state)| {
[INFO] [stderr]     |  ____________________________________________________________________________________^
[INFO] [stderr] 256 | |             part.iter().all(|&state_ix| {
[INFO] [stderr] 257 | |                 let state = &self.states[state_ix];
[INFO] [stderr] 258 | |                 state.by_char.iter().all(|(key, &to)| partition[&(to as usize)] == new_state.by_char.get(key).cloned().unwrap_or(new_state.default))
[INFO] [stderr] ...   |
[INFO] [stderr] 261 | |             })
[INFO] [stderr] 262 | |         }));
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::block_in_if_condition_stmt)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#block_in_if_condition_stmt
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `"docker" "inspect" "c6286009780f7c221282ce8bcbf2948e28f9009f556d03f6585d9fac78e8bcea"`
[INFO] running `"docker" "rm" "-f" "c6286009780f7c221282ce8bcbf2948e28f9009f556d03f6585d9fac78e8bcea"`
[INFO] [stdout] c6286009780f7c221282ce8bcbf2948e28f9009f556d03f6585d9fac78e8bcea