[INFO] crate radix_trie 0.1.4 is already in cache
[INFO] extracting crate radix_trie 0.1.4 into work/ex/clippy-test-run/sources/stable/reg/radix_trie/0.1.4
[INFO] extracting crate radix_trie 0.1.4 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/radix_trie/0.1.4
[INFO] validating manifest of radix_trie-0.1.4 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 radix_trie-0.1.4 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 radix_trie-0.1.4
[INFO] finished frobbing radix_trie-0.1.4
[INFO] frobbed toml for radix_trie-0.1.4 written to work/ex/clippy-test-run/sources/stable/reg/radix_trie/0.1.4/Cargo.toml
[INFO] started frobbing radix_trie-0.1.4
[INFO] finished frobbing radix_trie-0.1.4
[INFO] frobbed toml for radix_trie-0.1.4 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/radix_trie/0.1.4/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 radix_trie-0.1.4 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/radix_trie/0.1.4:/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] 30e8ba7cef854c641905897c788a1252af6b72e531ac5a9c314ed85382c43908
[INFO] running `"docker" "start" "-a" "30e8ba7cef854c641905897c788a1252af6b72e531ac5a9c314ed85382c43908"`
[INFO] [stderr]     Checking radix_trie v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/iter.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             root: root,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `root`
[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/iter.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr] 106 |             node: node,
[INFO] [stderr]   --> src/iter.rs:26:13
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `node`
[INFO] [stderr]    |
[INFO] [stderr]     |
[INFO] [stderr] 26 |             root: root,
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `root`
[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/iter.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |             node: node,
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `node`
[INFO] [stderr]   --> src/trie_node.rs:57:17
[INFO] [stderr]    |
[INFO] [stderr]     |
[INFO] [stderr] 57 |                 key: key,
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    |                 ^^^^^^^^ help: replace it with: `key`
[INFO] [stderr]    |
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/trie_node.rs:57:17
[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/trie_node.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 value: value,
[INFO] [stderr]    |                 ^^^^^^^^^^^^ help: replace it with: `value`
[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]    |
[INFO] [stderr] 57 |                 key: key,
[INFO] [stderr]    |                 ^^^^^^^^ help: replace it with: `key`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/trie_node.rs:154:13
[INFO] [stderr]   --> src/trie_node.rs:58:17
[INFO] [stderr]     |
[INFO] [stderr]    |
[INFO] [stderr] 154 |             key: key,
[INFO] [stderr] 58 |                 value: value,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `key`
[INFO] [stderr]    |                 ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]    |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[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] warning: redundant field names in struct initialization
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/trie_node.rs:155:13
[INFO] [stderr]    --> src/trie_node.rs:154:13
[INFO] [stderr]     |
[INFO] [stderr]     |
[INFO] [stderr] 155 |             value: value,
[INFO] [stderr] 154 |             key: key,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `value`
[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/trie_node.rs:213:13
[INFO] [stderr]     |
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `key`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/trie_node.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |             value: value,
[INFO] [stderr] 213 |             key: key,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `key`
[INFO] [stderr]     |
[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]     = 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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/trie_node.rs:213:13
[INFO] [stderr]    --> src/trie_node.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr]     |
[INFO] [stderr] 213 |             key: key,
[INFO] [stderr] 214 |             key_value: key_value,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `key`
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `key_value`
[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/trie_node.rs:215:13
[INFO] [stderr]     |
[INFO] [stderr] 215 |             children: children,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `children`
[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/trie_node.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr] 214 |             key_value: key_value,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `key_value`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    --> src/trie_node.rs:215:13
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]     |
[INFO] [stderr] 215 |             children: children,
[INFO] [stderr]    --> src/trie_node.rs:216:13
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `children`
[INFO] [stderr]     |
[INFO] [stderr]     |
[INFO] [stderr] 216 |             child_count: child_count,
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `child_count`
[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/trie_node.rs:222:13
[INFO] [stderr]     |
[INFO] [stderr] 222 |             prefix: prefix,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `prefix`
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    --> src/trie_node.rs:216:13
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]     |
[INFO] [stderr]    --> src/trie_node.rs:233:13
[INFO] [stderr] 216 |             child_count: child_count,
[INFO] [stderr]     |
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `child_count`
[INFO] [stderr] 233 |             prefix: prefix,
[INFO] [stderr]     |
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `prefix`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr]    --> src/trie_node.rs:222:13
[INFO] [stderr] 
[INFO] [stderr]     |
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr] 222 |             prefix: prefix,
[INFO] [stderr]    --> src/trie_node.rs:234:13
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `prefix`
[INFO] [stderr]     |
[INFO] [stderr]     |
[INFO] [stderr] 234 |             length: length,
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `length`
[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/trie_node.rs:233:13
[INFO] [stderr]     |
[INFO] [stderr] 233 |             prefix: prefix,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `prefix`
[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/trie_node.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 234 |             length: length,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `length`
[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: length comparison to zero
[INFO] [stderr]   --> src/traversal.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 97 |     if nv.len() == 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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: length comparison to zero
[INFO] [stderr]    --> src/traversal.rs:157:8
[INFO] [stderr]     |
[INFO] [stderr] 157 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/traversal.rs:268:8
[INFO] [stderr]     |
[INFO] [stderr] 268 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/traversal.rs:311:8
[INFO] [stderr]     |
[INFO] [stderr] 311 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/traversal.rs:355:8
[INFO] [stderr]     |
[INFO] [stderr] 355 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/trie_node.rs:244:23
[INFO] [stderr]     |
[INFO] [stderr] 244 |         let is_root = prefix.len() == 0;
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `prefix.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/trie_node.rs:253:24
[INFO] [stderr]     |
[INFO] [stderr] 253 |         if !is_root && self.key.len() == 0 {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.key.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: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/test.rs:6:21
[INFO] [stderr]   |
[INFO] [stderr] 6 | const TEST_DATA: [(&'static str, u32); 7] = [
[INFO] [stderr]   |                    -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/test.rs:357:17
[INFO] [stderr]     |
[INFO] [stderr] 357 |     trie.insert(0xdeadbeefu64, "asdf");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: consider: `0xdead_beefu64`
[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: length comparison to zero
[INFO] [stderr]   --> src/traversal.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 97 |     if nv.len() == 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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: length comparison to zero
[INFO] [stderr]    --> src/traversal.rs:157:8
[INFO] [stderr]     |
[INFO] [stderr] 157 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/traversal.rs:268:8
[INFO] [stderr]     |
[INFO] [stderr] 268 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/traversal.rs:311:8
[INFO] [stderr]     |
[INFO] [stderr] 311 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/traversal.rs:355:8
[INFO] [stderr]     |
[INFO] [stderr] 355 |     if nv.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `nv.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/trie_node.rs:244:23
[INFO] [stderr]     |
[INFO] [stderr] 244 |         let is_root = prefix.len() == 0;
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `prefix.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/trie_node.rs:253:24
[INFO] [stderr]     |
[INFO] [stderr] 253 |         if !is_root && self.key.len() == 0 {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.key.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: this boolean expression can be simplified
[INFO] [stderr]    --> src/qc_test.rs:238:16
[INFO] [stderr]     |
[INFO] [stderr] 238 |             if !insert_keys.contains(&k) && !trie.remove(&k).is_none() {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `!insert_keys.contains(&k) && trie.remove(&k).is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::nonminimal_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/test.rs:107:40
[INFO] [stderr]     |
[INFO] [stderr] 107 |     trie.map_with_default(&"abcd", |x| *x = *x + 1, 42);
[INFO] [stderr]     |                                        ^^^^^^^^^^^ help: replace it with: `*x += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/test.rs:109:39
[INFO] [stderr]     |
[INFO] [stderr] 109 |     trie.map_with_default(&"zzz", |x| *x = *x + 1, 42);
[INFO] [stderr]     |                                       ^^^^^^^^^^^ help: replace it with: `*x += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/test.rs:223:20
[INFO] [stderr]     |
[INFO] [stderr] 223 |     let expected = TEST_DATA.iter().map(|&x| x).collect::<Set>();
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `TEST_DATA.iter().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.68s
[INFO] running `"docker" "inspect" "30e8ba7cef854c641905897c788a1252af6b72e531ac5a9c314ed85382c43908"`
[INFO] running `"docker" "rm" "-f" "30e8ba7cef854c641905897c788a1252af6b72e531ac5a9c314ed85382c43908"`
[INFO] [stdout] 30e8ba7cef854c641905897c788a1252af6b72e531ac5a9c314ed85382c43908