[INFO] updating cached repository JacekPrzemieniecki/earley_parser
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JacekPrzemieniecki/earley_parser
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JacekPrzemieniecki/earley_parser" "work/ex/clippy-test-run/sources/stable/gh/JacekPrzemieniecki/earley_parser"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/JacekPrzemieniecki/earley_parser'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JacekPrzemieniecki/earley_parser" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/JacekPrzemieniecki/earley_parser"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/JacekPrzemieniecki/earley_parser'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 338e5c0bf2007c79f62a2f7a880f1d1448a3060d
[INFO] sha for GitHub repo JacekPrzemieniecki/earley_parser: 338e5c0bf2007c79f62a2f7a880f1d1448a3060d
[INFO] validating manifest of JacekPrzemieniecki/earley_parser 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 JacekPrzemieniecki/earley_parser 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 JacekPrzemieniecki/earley_parser
[INFO] finished frobbing JacekPrzemieniecki/earley_parser
[INFO] frobbed toml for JacekPrzemieniecki/earley_parser written to work/ex/clippy-test-run/sources/stable/gh/JacekPrzemieniecki/earley_parser/Cargo.toml
[INFO] started frobbing JacekPrzemieniecki/earley_parser
[INFO] finished frobbing JacekPrzemieniecki/earley_parser
[INFO] frobbed toml for JacekPrzemieniecki/earley_parser written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/JacekPrzemieniecki/earley_parser/Cargo.toml
[INFO] crate JacekPrzemieniecki/earley_parser 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 JacekPrzemieniecki/earley_parser against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/JacekPrzemieniecki/earley_parser:/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] 3ed12ee8155a19131cbb1a159c4921eef2c6d1b23df25346f0a1af29e0b5b5b6
[INFO] running `"docker" "start" "-a" "3ed12ee8155a19131cbb1a159c4921eef2c6d1b23df25346f0a1af29e0b5b5b6"`
[INFO] [stderr]     Checking earley_parser v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         write!(&mut s, "Symbols: \n").unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |             write!(&mut s, "{}\n", symbol).unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         write!(&mut s, "Rules: \n").unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             write!(s, "\n").unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/grammar.rs:76:42
[INFO] [stderr]    |
[INFO] [stderr] 76 |                 let new_symbol = Symbol {id: id, name: &head, is_terminal: false};
[INFO] [stderr]    |                                          ^^^^^^ help: replace it with: `id`
[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/grammar.rs:102:46
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     let new_symbol = Symbol {id: id, name: &name, is_terminal: is_terminal};
[INFO] [stderr]     |                                              ^^^^^^ help: replace it with: `id`
[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/grammar.rs:102:67
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     let new_symbol = Symbol {id: id, name: &name, is_terminal: is_terminal};
[INFO] [stderr]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `is_terminal`
[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/grammar.rs:117:32
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let g = Grammar {start: 1, rules: rules, symbols: symbols};
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: replace it with: `rules`
[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/grammar.rs:117:46
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let g = Grammar {start: 1, rules: rules, symbols: symbols};
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^ help: replace it with: `symbols`
[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/parser.rs:208:34
[INFO] [stderr]     |
[INFO] [stderr] 208 |             return Some(ASTNode {children: children, value: root_symbol});
[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: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/parser.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         write!(s, "{}\n", &gram.symbols[self.value].name);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         write!(&mut s, "Symbols: \n").unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |             write!(&mut s, "{}\n", symbol).unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         write!(&mut s, "Rules: \n").unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/grammar.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             write!(s, "\n").unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/grammar.rs:76:42
[INFO] [stderr]    |
[INFO] [stderr] 76 |                 let new_symbol = Symbol {id: id, name: &head, is_terminal: false};
[INFO] [stderr]    |                                          ^^^^^^ help: replace it with: `id`
[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/grammar.rs:102:46
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     let new_symbol = Symbol {id: id, name: &name, is_terminal: is_terminal};
[INFO] [stderr]     |                                              ^^^^^^ help: replace it with: `id`
[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/grammar.rs:102:67
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     let new_symbol = Symbol {id: id, name: &name, is_terminal: is_terminal};
[INFO] [stderr]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `is_terminal`
[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/grammar.rs:117:32
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let g = Grammar {start: 1, rules: rules, symbols: symbols};
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: replace it with: `rules`
[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/grammar.rs:117:46
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let g = Grammar {start: 1, rules: rules, symbols: symbols};
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^ help: replace it with: `symbols`
[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/parser.rs:208:34
[INFO] [stderr]     |
[INFO] [stderr] 208 |             return Some(ASTNode {children: children, value: root_symbol});
[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: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/parser.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         write!(s, "{}\n", &gram.symbols[self.value].name);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/grammar.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         return formatter.pad(&s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `formatter.pad(&s)`
[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/grammar.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         return formatter.pad(&s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `formatter.pad(&s)`
[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/grammar.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     return g;
[INFO] [stderr]     |     ^^^^^^^^^ help: remove `return` as shown: `g`
[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/tokenizer.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     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/parser.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         return &gram.symbols[current_symbol as usize];
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `&gram.symbols[current_symbol as usize]`
[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/parser.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |         return f;
[INFO] [stderr]    |         ^^^^^^^^^ help: remove `return` as shown: `f`
[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/parser.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     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/parser.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     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/parser.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     return Some(ast_children);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(ast_children)`
[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/parser.rs:221:5
[INFO] [stderr]     |
[INFO] [stderr] 221 |     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/parser.rs:236:9
[INFO] [stderr]     |
[INFO] [stderr] 236 |         return s;
[INFO] [stderr]     |         ^^^^^^^^^ help: remove `return` as shown: `s`
[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: unused import: `grammar::build_grammar`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use grammar::build_grammar;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     return buffer;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `buffer`
[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/grammar.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         return formatter.pad(&s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `formatter.pad(&s)`
[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/grammar.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         return formatter.pad(&s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `formatter.pad(&s)`
[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/grammar.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     return g;
[INFO] [stderr]     |     ^^^^^^^^^ help: remove `return` as shown: `g`
[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/tokenizer.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     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/parser.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         return &gram.symbols[current_symbol as usize];
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `&gram.symbols[current_symbol as usize]`
[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/parser.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |         return f;
[INFO] [stderr]    |         ^^^^^^^^^ help: remove `return` as shown: `f`
[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/parser.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     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/parser.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     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/parser.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     return Some(ast_children);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(ast_children)`
[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/parser.rs:221:5
[INFO] [stderr]     |
[INFO] [stderr] 221 |     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/parser.rs:236:9
[INFO] [stderr]     |
[INFO] [stderr] 236 |         return s;
[INFO] [stderr]     |         ^^^^^^^^^ help: remove `return` as shown: `s`
[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: unused import: `grammar::build_grammar`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use grammar::build_grammar;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     return buffer;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `buffer`
[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: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/grammar.rs:57:1
[INFO] [stderr]     |
[INFO] [stderr] 57  | / pub fn build_grammar<'a>(bn_form: &'a str) -> Grammar<'a> {
[INFO] [stderr] 58  | |     let mut symbols = Vec::<Symbol>::new();
[INFO] [stderr] 59  | |     symbols.push(Symbol {name: "End of input", id: 0, is_terminal: true});
[INFO] [stderr] 60  | |     let mut symbols_lut = HashSet::<&str>::new();
[INFO] [stderr] ...   |
[INFO] [stderr] 118 | |     return g;
[INFO] [stderr] 119 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/grammar.rs:63:36
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let mut split = line.split(" ");
[INFO] [stderr]    |                                    ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/grammar.rs:71:37
[INFO] [stderr]    |
[INFO] [stderr] 71 |           let head_symbol_id: usize = match symbols_lut.contains(head)
[INFO] [stderr]    |  _____________________________________^
[INFO] [stderr] 72 | |         {
[INFO] [stderr] 73 | |             true => symbols.iter().find(|e| e.name == head).expect("Error building grammar {}: 164361").id,
[INFO] [stderr] 74 | |             false => {
[INFO] [stderr] ...  |
[INFO] [stderr] 79 | |             }
[INFO] [stderr] 80 | |         };
[INFO] [stderr]    | |_________^
[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] help: consider using an if/else expression
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let head_symbol_id: usize = if symbols_lut.contains(head) { symbols.iter().find(|e| e.name == head).expect("Error building grammar {}: 164361").id } else {
[INFO] [stderr] 72 |     let id = symbols.len();
[INFO] [stderr] 73 |     let new_symbol = Symbol {id: id, name: &head, is_terminal: false};
[INFO] [stderr] 74 |     symbols.push(new_symbol);
[INFO] [stderr] 75 |     id
[INFO] [stderr] 76 | };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/grammar.rs:92:39
[INFO] [stderr]     |
[INFO] [stderr] 92  |               let tail_elem_id: usize = match symbols_lut.contains(elem)
[INFO] [stderr]     |  _______________________________________^
[INFO] [stderr] 93  | |             {
[INFO] [stderr] 94  | |                 true => match symbols.iter().find(|e| e.name == elem_trimmed) {
[INFO] [stderr] 95  | |                     Some(x) => x.id,
[INFO] [stderr] ...   |
[INFO] [stderr] 105 | |                 }
[INFO] [stderr] 106 | |             };
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 92  |             let tail_elem_id: usize = if symbols_lut.contains(elem) { match symbols.iter().find(|e| e.name == elem_trimmed) {
[INFO] [stderr] 93  |     Some(x) => x.id,
[INFO] [stderr] 94  |     None => panic!("Error building grammar, searching for {}", elem)
[INFO] [stderr] 95  | } } else {
[INFO] [stderr] 96  |     let id = symbols.len();
[INFO] [stderr] 97  |     let is_terminal = elem.starts_with("'");
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/grammar.rs:100:56
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     let is_terminal = elem.starts_with("'");
[INFO] [stderr]     |                                                        ^^^ help: try using a char instead: `'''`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]  --> src/tokenizer.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn tokenize<'a, 'b>(grammar: &Grammar, text: &'a str) -> Vec<Token<'a>>{
[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: single-character string constant used as pattern
[INFO] [stderr]   --> src/tokenizer.rs:20:33
[INFO] [stderr]    |
[INFO] [stderr] 20 |     for c in text_trimmed.split(" ") {
[INFO] [stderr]    |                                 ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/parser.rs:46:43
[INFO] [stderr]    |
[INFO] [stderr] 46 |             write!(f, "{} ", gram.symbols[sym.clone()].name).unwrap();
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: try dereferencing it: `*sym`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/parser.rs:105:33
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn reverse_and_sort(state_sets: &Vec<Vec<EarleyItem>>, gram: &Grammar) -> Vec<Vec<EarleyItem>> {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/parser.rs:121:33
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn print_state_sets(state_sets: &Vec<Vec<EarleyItem>>, gram: &Grammar, tokens: &Vec<Token>, print_tokens: bool) {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:121:80
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn print_state_sets(state_sets: &Vec<Vec<EarleyItem>>, gram: &Grammar, tokens: &Vec<Token>, print_tokens: bool) {
[INFO] [stderr]     |                                                                                ^^^^^^^^^^^ help: change this to: `&[Token]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:146:18
[INFO] [stderr]     |
[INFO] [stderr] 146 |     lookup_sets: &'a Vec<Vec<EarleyItem>>, 
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/parser.rs:150:22
[INFO] [stderr]     |
[INFO] [stderr] 150 |     if from == to && symbols.len() == 0 {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `symbols.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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/parser.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 | /         match find_split(item.start, to, rest, &lookup_sets, &gram) {
[INFO] [stderr] 161 | |             Some(mut v) => { v.push(item); return Some(v);}
[INFO] [stderr] 162 | |             None => {}
[INFO] [stderr] 163 | |         }
[INFO] [stderr]     | |_________^ help: try this: `if let Some(mut v) = find_split(item.start, to, rest, &lookup_sets, &gram) { v.push(item); return Some(v);}`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/parser.rs:170:12
[INFO] [stderr]     |
[INFO] [stderr] 170 |     split: &Vec<&EarleyItem>,
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^ help: change this to: `&[&EarleyItem]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:171:18
[INFO] [stderr]     |
[INFO] [stderr] 171 |     lookup_sets: &Vec<Vec<EarleyItem>>, 
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:191:18
[INFO] [stderr]     |
[INFO] [stderr] 191 |     lookup_sets: &Vec<Vec<EarleyItem>>, 
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/parser.rs:203:73
[INFO] [stderr]     |
[INFO] [stderr] 203 |         if gram.rules[edge.rule_id].symbols.iter().all(|i| gram.symbols[i.clone()].is_terminal) {
[INFO] [stderr]     |                                                                         ^^^^^^^^^ help: try dereferencing it: `*i`
[INFO] [stderr]     |
[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: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/parser.rs:206:69
[INFO] [stderr]     |
[INFO] [stderr] 206 |                 children.push(ASTNode {children: Vec::new(), value: terminal.clone()});
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*terminal`
[INFO] [stderr]     |
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:227:9
[INFO] [stderr]     |
[INFO] [stderr] 227 |         write!(s, "{}", indent);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/parser.rs:228:26
[INFO] [stderr]     |
[INFO] [stderr] 228 |           let new_indent = match last {
[INFO] [stderr]     |  __________________________^
[INFO] [stderr] 229 | |             true => { write!(s, "\\-"); indent.to_string() + "  "},
[INFO] [stderr] 230 | |             false => { write!(s, "|-"); indent.to_string() + "| "}
[INFO] [stderr] 231 | |         };
[INFO] [stderr]     | |_________^ help: consider using an if/else expression: `if last { write!(s, "\\-"); indent.to_string() + "  "} else { write!(s, "|-"); indent.to_string() + "| "}`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:229:23
[INFO] [stderr]     |
[INFO] [stderr] 229 |             true => { write!(s, "\\-"); indent.to_string() + "  "},
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:230:24
[INFO] [stderr]     |
[INFO] [stderr] 230 |             false => { write!(s, "|-"); indent.to_string() + "| "}
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         write!(s, "{}\n", &gram.symbols[self.value].name);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 234 |             write!(s, "{}", node.to_string(&gram, &new_indent, i == self.children.len() -1));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/grammar.rs:57:1
[INFO] [stderr]     |
[INFO] [stderr] 57  | / pub fn build_grammar<'a>(bn_form: &'a str) -> Grammar<'a> {
[INFO] [stderr] 58  | |     let mut symbols = Vec::<Symbol>::new();
[INFO] [stderr] 59  | |     symbols.push(Symbol {name: "End of input", id: 0, is_terminal: true});
[INFO] [stderr] 60  | |     let mut symbols_lut = HashSet::<&str>::new();
[INFO] [stderr] ...   |
[INFO] [stderr] 118 | |     return g;
[INFO] [stderr] 119 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/grammar.rs:63:36
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let mut split = line.split(" ");
[INFO] [stderr]    |                                    ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/grammar.rs:71:37
[INFO] [stderr]    |
[INFO] [stderr] 71 |           let head_symbol_id: usize = match symbols_lut.contains(head)
[INFO] [stderr]    |  _____________________________________^
[INFO] [stderr] 72 | |         {
[INFO] [stderr] 73 | |             true => symbols.iter().find(|e| e.name == head).expect("Error building grammar {}: 164361").id,
[INFO] [stderr] 74 | |             false => {
[INFO] [stderr] ...  |
[INFO] [stderr] 79 | |             }
[INFO] [stderr] 80 | |         };
[INFO] [stderr]    | |_________^
[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] help: consider using an if/else expression
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let head_symbol_id: usize = if symbols_lut.contains(head) { symbols.iter().find(|e| e.name == head).expect("Error building grammar {}: 164361").id } else {
[INFO] [stderr] 72 |     let id = symbols.len();
[INFO] [stderr] 73 |     let new_symbol = Symbol {id: id, name: &head, is_terminal: false};
[INFO] [stderr] 74 |     symbols.push(new_symbol);
[INFO] [stderr] 75 |     id
[INFO] [stderr] 76 | };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/grammar.rs:92:39
[INFO] [stderr]     |
[INFO] [stderr] 92  |               let tail_elem_id: usize = match symbols_lut.contains(elem)
[INFO] [stderr]     |  _______________________________________^
[INFO] [stderr] 93  | |             {
[INFO] [stderr] 94  | |                 true => match symbols.iter().find(|e| e.name == elem_trimmed) {
[INFO] [stderr] 95  | |                     Some(x) => x.id,
[INFO] [stderr] ...   |
[INFO] [stderr] 105 | |                 }
[INFO] [stderr] 106 | |             };
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 92  |             let tail_elem_id: usize = if symbols_lut.contains(elem) { match symbols.iter().find(|e| e.name == elem_trimmed) {
[INFO] [stderr] 93  |     Some(x) => x.id,
[INFO] [stderr] 94  |     None => panic!("Error building grammar, searching for {}", elem)
[INFO] [stderr] 95  | } } else {
[INFO] [stderr] 96  |     let id = symbols.len();
[INFO] [stderr] 97  |     let is_terminal = elem.starts_with("'");
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/grammar.rs:100:56
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     let is_terminal = elem.starts_with("'");
[INFO] [stderr]     |                                                        ^^^ help: try using a char instead: `'''`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]  --> src/tokenizer.rs:9:21
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn tokenize<'a, 'b>(grammar: &Grammar, text: &'a str) -> Vec<Token<'a>>{
[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: single-character string constant used as pattern
[INFO] [stderr]   --> src/tokenizer.rs:20:33
[INFO] [stderr]    |
[INFO] [stderr] 20 |     for c in text_trimmed.split(" ") {
[INFO] [stderr]    |                                 ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/parser.rs:46:43
[INFO] [stderr]    |
[INFO] [stderr] 46 |             write!(f, "{} ", gram.symbols[sym.clone()].name).unwrap();
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: try dereferencing it: `*sym`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/parser.rs:105:33
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn reverse_and_sort(state_sets: &Vec<Vec<EarleyItem>>, gram: &Grammar) -> Vec<Vec<EarleyItem>> {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/parser.rs:121:33
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn print_state_sets(state_sets: &Vec<Vec<EarleyItem>>, gram: &Grammar, tokens: &Vec<Token>, print_tokens: bool) {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:121:80
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn print_state_sets(state_sets: &Vec<Vec<EarleyItem>>, gram: &Grammar, tokens: &Vec<Token>, print_tokens: bool) {
[INFO] [stderr]     |                                                                                ^^^^^^^^^^^ help: change this to: `&[Token]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:146:18
[INFO] [stderr]     |
[INFO] [stderr] 146 |     lookup_sets: &'a Vec<Vec<EarleyItem>>, 
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/parser.rs:150:22
[INFO] [stderr]     |
[INFO] [stderr] 150 |     if from == to && symbols.len() == 0 {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `symbols.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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/parser.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 | /         match find_split(item.start, to, rest, &lookup_sets, &gram) {
[INFO] [stderr] 161 | |             Some(mut v) => { v.push(item); return Some(v);}
[INFO] [stderr] 162 | |             None => {}
[INFO] [stderr] 163 | |         }
[INFO] [stderr]     | |_________^ help: try this: `if let Some(mut v) = find_split(item.start, to, rest, &lookup_sets, &gram) { v.push(item); return Some(v);}`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/parser.rs:170:12
[INFO] [stderr]     |
[INFO] [stderr] 170 |     split: &Vec<&EarleyItem>,
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^ help: change this to: `&[&EarleyItem]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:171:18
[INFO] [stderr]     |
[INFO] [stderr] 171 |     lookup_sets: &Vec<Vec<EarleyItem>>, 
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/parser.rs:191:18
[INFO] [stderr]     |
[INFO] [stderr] 191 |     lookup_sets: &Vec<Vec<EarleyItem>>, 
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<EarleyItem>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/parser.rs:203:73
[INFO] [stderr]     |
[INFO] [stderr] 203 |         if gram.rules[edge.rule_id].symbols.iter().all(|i| gram.symbols[i.clone()].is_terminal) {
[INFO] [stderr]     |                                                                         ^^^^^^^^^ help: try dereferencing it: `*i`
[INFO] [stderr]     |
[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: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/parser.rs:206:69
[INFO] [stderr]     |
[INFO] [stderr] 206 |                 children.push(ASTNode {children: Vec::new(), value: terminal.clone()});
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*terminal`
[INFO] [stderr]     |
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:227:9
[INFO] [stderr]     |
[INFO] [stderr] 227 |         write!(s, "{}", indent);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/parser.rs:228:26
[INFO] [stderr]     |
[INFO] [stderr] 228 |           let new_indent = match last {
[INFO] [stderr]     |  __________________________^
[INFO] [stderr] 229 | |             true => { write!(s, "\\-"); indent.to_string() + "  "},
[INFO] [stderr] 230 | |             false => { write!(s, "|-"); indent.to_string() + "| "}
[INFO] [stderr] 231 | |         };
[INFO] [stderr]     | |_________^ help: consider using an if/else expression: `if last { write!(s, "\\-"); indent.to_string() + "  "} else { write!(s, "|-"); indent.to_string() + "| "}`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:229:23
[INFO] [stderr]     |
[INFO] [stderr] 229 |             true => { write!(s, "\\-"); indent.to_string() + "  "},
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:230:24
[INFO] [stderr]     |
[INFO] [stderr] 230 |             false => { write!(s, "|-"); indent.to_string() + "| "}
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         write!(s, "{}\n", &gram.symbols[self.value].name);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 234 |             write!(s, "{}", node.to_string(&gram, &new_indent, i == self.children.len() -1));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "3ed12ee8155a19131cbb1a159c4921eef2c6d1b23df25346f0a1af29e0b5b5b6"`
[INFO] running `"docker" "rm" "-f" "3ed12ee8155a19131cbb1a159c4921eef2c6d1b23df25346f0a1af29e0b5b5b6"`
[INFO] [stdout] 3ed12ee8155a19131cbb1a159c4921eef2c6d1b23df25346f0a1af29e0b5b5b6