[INFO] updating cached repository pnathan/signifier
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pnathan/signifier
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pnathan/signifier" "work/ex/clippy-test-run/sources/stable/gh/pnathan/signifier"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/pnathan/signifier'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pnathan/signifier" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/pnathan/signifier"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/pnathan/signifier'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c7d4b4fa772fd1e301901b453dc81e0cac60f3ce
[INFO] sha for GitHub repo pnathan/signifier: c7d4b4fa772fd1e301901b453dc81e0cac60f3ce
[INFO] validating manifest of pnathan/signifier 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 pnathan/signifier 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 pnathan/signifier
[INFO] finished frobbing pnathan/signifier
[INFO] frobbed toml for pnathan/signifier written to work/ex/clippy-test-run/sources/stable/gh/pnathan/signifier/Cargo.toml
[INFO] started frobbing pnathan/signifier
[INFO] finished frobbing pnathan/signifier
[INFO] frobbed toml for pnathan/signifier written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/pnathan/signifier/Cargo.toml
[INFO] crate pnathan/signifier has a lockfile. skipping
[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 pnathan/signifier against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/pnathan/signifier:/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] 94b84e3b642549cc6aecb1328948601ee5063ca7277e112520b1a86bd9489f95
[INFO] running `"docker" "start" "-a" "94b84e3b642549cc6aecb1328948601ee5063ca7277e112520b1a86bd9489f95"`
[INFO] [stderr]     Checking serde v0.9.13
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]    Compiling hyper v0.10.7
[INFO] [stderr]    Compiling syn v0.11.10
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking flame v0.1.11
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]     Checking semver-parser v0.6.2
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking semver v0.5.1
[INFO] [stderr]    Compiling serde_derive v0.9.13
[INFO] [stderr]     Checking serde_json v0.9.10
[INFO] [stderr]     Checking rusted_cypher v1.0.0
[INFO] [stderr]     Checking signifier v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/barrier/mod.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Barrier { top : top,
[INFO] [stderr]    |                   ^^^^^^^^^ help: replace it with: `top`
[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/barrier/mod.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Barrier { top : top,
[INFO] [stderr]    |                   ^^^^^^^^^ help: replace it with: `top`
[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: unneeded return statement
[INFO] [stderr]   --> src/queue/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     return (sender, receiver);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(sender, receiver)`
[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/queue/mod.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         return Queue { elements : self.elements.clone() }
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Queue { elements : self.elements.clone() }`
[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/queue/mod.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         return guard.unwrap().pop();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `guard.unwrap().pop()`
[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/queue/mod.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |         return guard.unwrap().len();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `guard.unwrap().len()`
[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/barrier/mod.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |         return result;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[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/main.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     return is_7_bit;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `is_7_bit`
[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/main.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     return result;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[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/main.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 | /     return filename != "" &&
[INFO] [stderr] 122 | |         ! (filename.contains(".git") || filename.contains(".hg")) &&
[INFO] [stderr] 123 | |         match final_char { Some(c) => c != '~', None => false }
[INFO] [stderr]     | |_______________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 121 |     filename != "" &&
[INFO] [stderr] 122 |         ! (filename.contains(".git") || filename.contains(".hg")) &&
[INFO] [stderr] 123 |         match final_char { Some(c) => c != '~', None => false }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/queue/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     return (sender, receiver);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(sender, receiver)`
[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/queue/mod.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         return Queue { elements : self.elements.clone() }
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Queue { elements : self.elements.clone() }`
[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/queue/mod.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         return guard.unwrap().pop();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `guard.unwrap().pop()`
[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/queue/mod.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |         return guard.unwrap().len();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `guard.unwrap().len()`
[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/barrier/mod.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |         return result;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[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/main.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     return is_7_bit;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `is_7_bit`
[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/main.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     return result;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[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/main.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 | /     return filename != "" &&
[INFO] [stderr] 122 | |         ! (filename.contains(".git") || filename.contains(".hg")) &&
[INFO] [stderr] 123 | |         match final_char { Some(c) => c != '~', None => false }
[INFO] [stderr]     | |_______________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 121 |     filename != "" &&
[INFO] [stderr] 122 |         ! (filename.contains(".git") || filename.contains(".hg")) &&
[INFO] [stderr] 123 |         match final_char { Some(c) => c != '~', None => false }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx_collector`
[INFO] [stderr]    --> src/main.rs:199:17
[INFO] [stderr]     |
[INFO] [stderr] 199 |         let mut tx_collector = tx_collector.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: consider using `_tx_collector` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word_file_map`
[INFO] [stderr]    --> src/main.rs:331:13
[INFO] [stderr]     |
[INFO] [stderr] 331 |     let mut word_file_map : HashMap<String, Vec<String>> = HashMap::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: consider using `_word_file_map` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:331:9
[INFO] [stderr]     |
[INFO] [stderr] 331 |     let mut word_file_map : HashMap<String, Vec<String>> = HashMap::new();
[INFO] [stderr]     |         ----^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/barrier/mod.rs:18:40
[INFO] [stderr]    |
[INFO] [stderr] 18 |                   completed : Arc::new(Mutex::new(0)) }
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::mutex_atomic)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/barrier/mod.rs:62:18
[INFO] [stderr]    |
[INFO] [stderr] 62 |             top: self.top.clone()
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.top`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/main.rs:87:12
[INFO] [stderr]    |
[INFO] [stderr] 87 |            match is_7_bit { true => "ascii", false => "binary"} );
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using an if/else expression: `if is_7_bit { "ascii" } else { "binary" }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/main.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         Err(_) => panic!("Unable to open file {}", filename)
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/main.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 | /     (Queue<(String, BTreeSet<String>)>,
[INFO] [stderr] 194 | |      Queue<(String, BTreeSet<String>)>) = queue::new();
[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: useless use of `vec!`
[INFO] [stderr]    --> src/main.rs:250:50
[INFO] [stderr]     |
[INFO] [stderr] 250 |                                     for (k,v) in vec![("word", &s)] {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[("word", &s)]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_vec)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]    --> src/main.rs:278:50
[INFO] [stderr]     |
[INFO] [stderr] 278 |                                     for (k,v) in vec![("word", &word), ("filename", &filename)] {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[("word", &word), ("filename", &filename)]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/main.rs:337:5
[INFO] [stderr]     |
[INFO] [stderr] 337 | /     loop {
[INFO] [stderr] 338 | |         match rx_collector.pop() {
[INFO] [stderr] 339 | |             Some((filename, set)) => {
[INFO] [stderr] 340 | |                 let mut query = graph.query();
[INFO] [stderr] ...   |
[INFO] [stderr] 376 | |         };
[INFO] [stderr] 377 | |     }
[INFO] [stderr]     | |_____^ help: try: `while let Some((filename, set)) = rx_collector.pop() { .. }`
[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: useless use of `vec!`
[INFO] [stderr]    --> src/main.rs:355:34
[INFO] [stderr]     |
[INFO] [stderr] 355 |                     for (k,v) in vec![("word", &word), ("filename", &filename)] {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[("word", &word), ("filename", &filename)]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx_collector`
[INFO] [stderr]    --> src/main.rs:199:17
[INFO] [stderr]     |
[INFO] [stderr] 199 |         let mut tx_collector = tx_collector.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: consider using `_tx_collector` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word_file_map`
[INFO] [stderr]    --> src/main.rs:331:13
[INFO] [stderr]     |
[INFO] [stderr] 331 |     let mut word_file_map : HashMap<String, Vec<String>> = HashMap::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: consider using `_word_file_map` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:331:9
[INFO] [stderr]     |
[INFO] [stderr] 331 |     let mut word_file_map : HashMap<String, Vec<String>> = HashMap::new();
[INFO] [stderr]     |         ----^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/barrier/mod.rs:18:40
[INFO] [stderr]    |
[INFO] [stderr] 18 |                   completed : Arc::new(Mutex::new(0)) }
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::mutex_atomic)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/barrier/mod.rs:62:18
[INFO] [stderr]    |
[INFO] [stderr] 62 |             top: self.top.clone()
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.top`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/main.rs:87:12
[INFO] [stderr]    |
[INFO] [stderr] 87 |            match is_7_bit { true => "ascii", false => "binary"} );
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using an if/else expression: `if is_7_bit { "ascii" } else { "binary" }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/main.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         Err(_) => panic!("Unable to open file {}", filename)
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/main.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 | /     (Queue<(String, BTreeSet<String>)>,
[INFO] [stderr] 194 | |      Queue<(String, BTreeSet<String>)>) = queue::new();
[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: useless use of `vec!`
[INFO] [stderr]    --> src/main.rs:250:50
[INFO] [stderr]     |
[INFO] [stderr] 250 |                                     for (k,v) in vec![("word", &s)] {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[("word", &s)]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_vec)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]    --> src/main.rs:278:50
[INFO] [stderr]     |
[INFO] [stderr] 278 |                                     for (k,v) in vec![("word", &word), ("filename", &filename)] {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[("word", &word), ("filename", &filename)]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/main.rs:337:5
[INFO] [stderr]     |
[INFO] [stderr] 337 | /     loop {
[INFO] [stderr] 338 | |         match rx_collector.pop() {
[INFO] [stderr] 339 | |             Some((filename, set)) => {
[INFO] [stderr] 340 | |                 let mut query = graph.query();
[INFO] [stderr] ...   |
[INFO] [stderr] 376 | |         };
[INFO] [stderr] 377 | |     }
[INFO] [stderr]     | |_____^ help: try: `while let Some((filename, set)) = rx_collector.pop() { .. }`
[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: useless use of `vec!`
[INFO] [stderr]    --> src/main.rs:355:34
[INFO] [stderr]     |
[INFO] [stderr] 355 |                     for (k,v) in vec![("word", &word), ("filename", &filename)] {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[("word", &word), ("filename", &filename)]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.09s
[INFO] running `"docker" "inspect" "94b84e3b642549cc6aecb1328948601ee5063ca7277e112520b1a86bd9489f95"`
[INFO] running `"docker" "rm" "-f" "94b84e3b642549cc6aecb1328948601ee5063ca7277e112520b1a86bd9489f95"`
[INFO] [stdout] 94b84e3b642549cc6aecb1328948601ee5063ca7277e112520b1a86bd9489f95