[INFO] updating cached repository sejr/core-interpreter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sejr/core-interpreter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sejr/core-interpreter" "work/ex/clippy-test-run/sources/stable/gh/sejr/core-interpreter"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/sejr/core-interpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sejr/core-interpreter" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sejr/core-interpreter"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sejr/core-interpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 64c00c6dba34face0a27e389ac2cd2e2b4bc4976
[INFO] sha for GitHub repo sejr/core-interpreter: 64c00c6dba34face0a27e389ac2cd2e2b4bc4976
[INFO] validating manifest of sejr/core-interpreter 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 sejr/core-interpreter 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 sejr/core-interpreter
[INFO] finished frobbing sejr/core-interpreter
[INFO] frobbed toml for sejr/core-interpreter written to work/ex/clippy-test-run/sources/stable/gh/sejr/core-interpreter/Cargo.toml
[INFO] started frobbing sejr/core-interpreter
[INFO] finished frobbing sejr/core-interpreter
[INFO] frobbed toml for sejr/core-interpreter written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sejr/core-interpreter/Cargo.toml
[INFO] crate sejr/core-interpreter 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 sejr/core-interpreter against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sejr/core-interpreter:/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 -Dclippy::into_iter_on_array" "-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] 0159f3c81fc11032ace18a33a083d24a7e4f34b69f8ff3fe51c9438b76d334f9
[INFO] running `"docker" "start" "-a" "0159f3c81fc11032ace18a33a083d24a7e4f34b69f8ff3fe51c9438b76d334f9"`
[INFO] [stderr]     Checking core v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/parser.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         println!("");
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/parser.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         println!("");
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/tokenizer.rs:347:9
[INFO] [stderr]     |
[INFO] [stderr] 347 |         return Token::LineComment;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::LineComment`
[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/tokenizer.rs:365:9
[INFO] [stderr]     |
[INFO] [stderr] 365 |         return Token::BlockComment;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::BlockComment`
[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:367:9
[INFO] [stderr]     |
[INFO] [stderr] 367 |         return Token::Divison;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Divison`
[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:439:22
[INFO] [stderr]     |
[INFO] [stderr] 439 |         "program" => return Token::Program,
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Program`
[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:440:20
[INFO] [stderr]     |
[INFO] [stderr] 440 |         "begin" => return Token::Begin,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Begin`
[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:441:18
[INFO] [stderr]     |
[INFO] [stderr] 441 |         "end" => return Token::End,
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::End`
[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:442:18
[INFO] [stderr]     |
[INFO] [stderr] 442 |         "int" => return Token::Int,
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Int`
[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:443:17
[INFO] [stderr]     |
[INFO] [stderr] 443 |         "if" => return Token::If,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::If`
[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:444:19
[INFO] [stderr]     |
[INFO] [stderr] 444 |         "then" => return Token::Then,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Then`
[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:445:19
[INFO] [stderr]     |
[INFO] [stderr] 445 |         "else" => return Token::Else,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Else`
[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:446:20
[INFO] [stderr]     |
[INFO] [stderr] 446 |         "while" => return Token::While,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::While`
[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:447:19
[INFO] [stderr]     |
[INFO] [stderr] 447 |         "loop" => return Token::Loop,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Loop`
[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:448:19
[INFO] [stderr]     |
[INFO] [stderr] 448 |         "read" => return Token::Read,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Read`
[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:449:20
[INFO] [stderr]     |
[INFO] [stderr] 449 |         "write" => return Token::Write,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Write`
[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:450:14
[INFO] [stderr]     |
[INFO] [stderr] 450 |         _ => return Token::Error,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Error`
[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:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         return &self.tokens.index(self.state as usize);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `&self.tokens.index(self.state 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:32:42
[INFO] [stderr]    |
[INFO] [stderr] 32 |             Token::Identifier(ref id) => return id.to_string(),
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `id.to_string()`
[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:45:42
[INFO] [stderr]    |
[INFO] [stderr] 45 |             Token::Integer(ref value) => return value,
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: remove `return` as shown: `value`
[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:73:29
[INFO] [stderr]    |
[INFO] [stderr] 73 |             Some(&value) => return value,
[INFO] [stderr]    |                             ^^^^^^^^^^^^ help: remove `return` as shown: `value`
[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:347:9
[INFO] [stderr]     |
[INFO] [stderr] 347 |         return Token::LineComment;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::LineComment`
[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/tokenizer.rs:365:9
[INFO] [stderr]     |
[INFO] [stderr] 365 |         return Token::BlockComment;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::BlockComment`
[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:367:9
[INFO] [stderr]     |
[INFO] [stderr] 367 |         return Token::Divison;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Divison`
[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:439:22
[INFO] [stderr]     |
[INFO] [stderr] 439 |         "program" => return Token::Program,
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Program`
[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:440:20
[INFO] [stderr]     |
[INFO] [stderr] 440 |         "begin" => return Token::Begin,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Begin`
[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:441:18
[INFO] [stderr]     |
[INFO] [stderr] 441 |         "end" => return Token::End,
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::End`
[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:442:18
[INFO] [stderr]     |
[INFO] [stderr] 442 |         "int" => return Token::Int,
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Int`
[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:443:17
[INFO] [stderr]     |
[INFO] [stderr] 443 |         "if" => return Token::If,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::If`
[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:444:19
[INFO] [stderr]     |
[INFO] [stderr] 444 |         "then" => return Token::Then,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Then`
[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:445:19
[INFO] [stderr]     |
[INFO] [stderr] 445 |         "else" => return Token::Else,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Else`
[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:446:20
[INFO] [stderr]     |
[INFO] [stderr] 446 |         "while" => return Token::While,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::While`
[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:447:19
[INFO] [stderr]     |
[INFO] [stderr] 447 |         "loop" => return Token::Loop,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Loop`
[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:448:19
[INFO] [stderr]     |
[INFO] [stderr] 448 |         "read" => return Token::Read,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Read`
[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:449:20
[INFO] [stderr]     |
[INFO] [stderr] 449 |         "write" => return Token::Write,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Write`
[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:450:14
[INFO] [stderr]     |
[INFO] [stderr] 450 |         _ => return Token::Error,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Token::Error`
[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:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         return &self.tokens.index(self.state as usize);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `&self.tokens.index(self.state 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:32:42
[INFO] [stderr]    |
[INFO] [stderr] 32 |             Token::Identifier(ref id) => return id.to_string(),
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `id.to_string()`
[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:45:42
[INFO] [stderr]    |
[INFO] [stderr] 45 |             Token::Integer(ref value) => return value,
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: remove `return` as shown: `value`
[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:73:29
[INFO] [stderr]    |
[INFO] [stderr] 73 |             Some(&value) => return value,
[INFO] [stderr]    |                             ^^^^^^^^^^^^ help: remove `return` as shown: `value`
[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: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/tokenizer.rs:119:26
[INFO] [stderr]     |
[INFO] [stderr] 119 | pub fn init_driver(file: &String) {
[INFO] [stderr]     |                          ^^^^^^^ help: change this to: `&str`
[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 `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/tokenizer.rs:133:24
[INFO] [stderr]     |
[INFO] [stderr] 133 | fn tokenize_file(file: &String) -> Vec<Token> {
[INFO] [stderr]     |                        ^^^^^^^ help: change this to: `&str`
[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/tokenizer.rs:220:24
[INFO] [stderr]     |
[INFO] [stderr] 220 | fn tokenize_equal(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                        ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:233:29
[INFO] [stderr]     |
[INFO] [stderr] 233 | fn tokenize_logical_or(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                             ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:245:30
[INFO] [stderr]     |
[INFO] [stderr] 245 | fn tokenize_logical_and(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                              ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:255:26
[INFO] [stderr]     |
[INFO] [stderr] 255 | fn tokenize_inequal(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                          ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:265:25
[INFO] [stderr]     |
[INFO] [stderr] 265 | fn tokenize_lt_lte(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                         ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:275:25
[INFO] [stderr]     |
[INFO] [stderr] 275 | fn tokenize_gt_gte(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                         ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:292:30
[INFO] [stderr]     |
[INFO] [stderr] 292 | fn tokenize_subtraction(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                              ^^^^^^^^ help: change this to: `&[u8]`
[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: this boolean expression can be simplified
[INFO] [stderr]    --> src/tokenizer.rs:315:23
[INFO] [stderr]     |
[INFO] [stderr] 315 |               } else if (buf[i] as char >= 'a' && buf[i] as char <= 'z') ||
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 316 | |                       (buf[i] as char >= 'A' && buf[i] as char <= 'z') {
[INFO] [stderr]     | |______________________________________________________________________^
[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] help: try
[INFO] [stderr]     |
[INFO] [stderr] 315 |             } else if !(buf[i] as char < 'a' && buf[i] as char < 'A' || buf[i] as char > 'z') {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 315 |             } else if (buf[i] as char >= 'a' || buf[i] as char >= 'A') && buf[i] as char <= 'z' {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/tokenizer.rs:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |         i + 1;
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]    --> src/tokenizer.rs:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |         i + 1;
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::no_effect)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[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/tokenizer.rs:336:27
[INFO] [stderr]     |
[INFO] [stderr] 336 | fn tokenize_division(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                           ^^^^^^^^ help: change this to: `&[u8]`
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/tokenizer.rs:341:13
[INFO] [stderr]     |
[INFO] [stderr] 341 |             i = i + 1;
[INFO] [stderr]     |             ^^^^^^^^^ help: replace it with: `i += 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/tokenizer.rs:352:13
[INFO] [stderr]     |
[INFO] [stderr] 352 |             i = i+1;
[INFO] [stderr]     |             ^^^^^^^ help: replace it with: `i += 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: manual implementation of an assign operation
[INFO] [stderr]    --> src/tokenizer.rs:356:21
[INFO] [stderr]     |
[INFO] [stderr] 356 |                     i = i + 2;
[INFO] [stderr]     |                     ^^^^^^^^^ help: replace it with: `i += 2`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/tokenizer.rs:371:26
[INFO] [stderr]     |
[INFO] [stderr] 371 | fn tokenize_integer(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                          ^^^^^^^^ help: change this to: `&[u8]`
[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: this boolean expression can be simplified
[INFO] [stderr]    --> src/tokenizer.rs:388:19
[INFO] [stderr]     |
[INFO] [stderr] 388 |           } else if (buf[i] as char >= 'a' && buf[i] as char <= 'z') ||
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 389 | |                   (buf[i] as char >= 'A' && buf[i] as char <= 'z') {
[INFO] [stderr]     | |__________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 388 |         } else if !(buf[i] as char < 'a' && buf[i] as char < 'A' || buf[i] as char > 'z') {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 388 |         } else if (buf[i] as char >= 'a' || buf[i] as char >= 'A') && buf[i] as char <= 'z' {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/tokenizer.rs:406:26
[INFO] [stderr]     |
[INFO] [stderr] 406 | fn tokenize_keyword(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                          ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:454:29
[INFO] [stderr]     |
[INFO] [stderr] 454 | fn tokenize_identifier(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                             ^^^^^^^^ help: change this to: `&[u8]`
[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: this boolean expression can be simplified
[INFO] [stderr]    --> src/tokenizer.rs:485:19
[INFO] [stderr]     |
[INFO] [stderr] 485 |           } else if (buf[i] as char >= 'a' && buf[i] as char <= 'z') ||
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 486 | |                   (buf[i] as char >= 'A' && buf[i] as char <= 'z') {
[INFO] [stderr]     | |__________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 485 |         } else if !(buf[i] as char < 'a' && buf[i] as char < 'A' || buf[i] as char > 'z') {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 485 |         } else if (buf[i] as char >= 'a' || buf[i] as char >= 'A') && buf[i] as char <= 'z' {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/executor.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 | /     match tree.get_token() {
[INFO] [stderr] 104 | |         &Token::Identifier(ref i) => {
[INFO] [stderr] 105 | |             id_flag = true;
[INFO] [stderr] 106 | |             match_flag = true;
[INFO] [stderr] 107 | |         },
[INFO] [stderr] 108 | |         _ => print!("")
[INFO] [stderr] 109 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 103 |     match *tree.get_token() {
[INFO] [stderr] 104 |         Token::Identifier(ref i) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/executor.rs:161:50
[INFO] [stderr]     |
[INFO] [stderr] 161 |         tree.insert_variable(current_id.clone(), result.clone());
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: try removing the `clone` call: `result`
[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: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/executor.rs:248:31
[INFO] [stderr]     |
[INFO] [stderr] 248 |     let mut start_state:u32 = tree.state.clone();
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `tree.state`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/executor.rs:486:9
[INFO] [stderr]     |
[INFO] [stderr] 486 | /         match tree.get_token() {
[INFO] [stderr] 487 | |             &Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 488 | |             &Token::Integer(ref i) => int_flag = true,
[INFO] [stderr] 489 | |             _ => panic!("execute_op: token is not identifier")
[INFO] [stderr] 490 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 486 |         match *tree.get_token() {
[INFO] [stderr] 487 |             Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 488 |             Token::Integer(ref i) => int_flag = true,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/executor.rs:515:5
[INFO] [stderr]     |
[INFO] [stderr] 515 | /     match tree.get_token() {
[INFO] [stderr] 516 | |         &Token::LogicalEquality => {
[INFO] [stderr] 517 | |             result = 0;
[INFO] [stderr] 518 | |         },
[INFO] [stderr] ...   |
[INFO] [stderr] 534 | |         _ => panic!("execute_comp_op: unexpected comp op")
[INFO] [stderr] 535 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 515 |     match *tree.get_token() {
[INFO] [stderr] 516 |         Token::LogicalEquality => {
[INFO] [stderr] 517 |             result = 0;
[INFO] [stderr] 518 |         },
[INFO] [stderr] 519 |         Token::LogicalInequality => {
[INFO] [stderr] 520 |             result = 1;
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:196:5
[INFO] [stderr]     |
[INFO] [stderr] 196 | /     match tree.get_token() {
[INFO] [stderr] 197 | |         &Token::Identifier(ref i) => {
[INFO] [stderr] 198 | |             id_flag = true;
[INFO] [stderr] 199 | |             match_flag = true;
[INFO] [stderr] 200 | |         },
[INFO] [stderr] 201 | |         _ => print!("")
[INFO] [stderr] 202 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 196 |     match *tree.get_token() {
[INFO] [stderr] 197 |         Token::Identifier(ref i) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/parser.rs:256:50
[INFO] [stderr]     |
[INFO] [stderr] 256 |         tree.insert_variable(current_id.clone(), result.clone());
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: try removing the `clone` call: `result`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:552:9
[INFO] [stderr]     |
[INFO] [stderr] 552 | /         match tree.get_token() {
[INFO] [stderr] 553 | |             &Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 554 | |             &Token::Integer(ref i) => int_flag = true,
[INFO] [stderr] 555 | |             _ => panic!("parse_op: token is not identifier")
[INFO] [stderr] 556 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 552 |         match *tree.get_token() {
[INFO] [stderr] 553 |             Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 554 |             Token::Integer(ref i) => int_flag = true,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:581:5
[INFO] [stderr]     |
[INFO] [stderr] 581 | /     match tree.get_token() {
[INFO] [stderr] 582 | |         &Token::LogicalEquality => {
[INFO] [stderr] 583 | |             tree.current_statement.push_str(" == ");
[INFO] [stderr] 584 | |             result = 0;
[INFO] [stderr] ...   |
[INFO] [stderr] 606 | |         _ => panic!("parse_comp_op: unexpected comp op")
[INFO] [stderr] 607 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 581 |     match *tree.get_token() {
[INFO] [stderr] 582 |         Token::LogicalEquality => {
[INFO] [stderr] 583 |             tree.current_statement.push_str(" == ");
[INFO] [stderr] 584 |             result = 0;
[INFO] [stderr] 585 |         },
[INFO] [stderr] 586 |         Token::LogicalInequality => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/main.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let ref file: String = args[1];
[INFO] [stderr]    |         ----^^^^^^^^------------------- help: try: `let file: &String = &args[1];`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/tokenizer.rs:119:26
[INFO] [stderr]     |
[INFO] [stderr] 119 | pub fn init_driver(file: &String) {
[INFO] [stderr]     |                          ^^^^^^^ help: change this to: `&str`
[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 `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/tokenizer.rs:133:24
[INFO] [stderr]     |
[INFO] [stderr] 133 | fn tokenize_file(file: &String) -> Vec<Token> {
[INFO] [stderr]     |                        ^^^^^^^ help: change this to: `&str`
[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/tokenizer.rs:220:24
[INFO] [stderr]     |
[INFO] [stderr] 220 | fn tokenize_equal(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                        ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:233:29
[INFO] [stderr]     |
[INFO] [stderr] 233 | fn tokenize_logical_or(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                             ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:245:30
[INFO] [stderr]     |
[INFO] [stderr] 245 | fn tokenize_logical_and(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                              ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:255:26
[INFO] [stderr]     |
[INFO] [stderr] 255 | fn tokenize_inequal(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                          ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:265:25
[INFO] [stderr]     |
[INFO] [stderr] 265 | fn tokenize_lt_lte(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                         ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:275:25
[INFO] [stderr]     |
[INFO] [stderr] 275 | fn tokenize_gt_gte(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                         ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:292:30
[INFO] [stderr]     |
[INFO] [stderr] 292 | fn tokenize_subtraction(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                              ^^^^^^^^ help: change this to: `&[u8]`
[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: this boolean expression can be simplified
[INFO] [stderr]    --> src/tokenizer.rs:315:23
[INFO] [stderr]     |
[INFO] [stderr] 315 |               } else if (buf[i] as char >= 'a' && buf[i] as char <= 'z') ||
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 316 | |                       (buf[i] as char >= 'A' && buf[i] as char <= 'z') {
[INFO] [stderr]     | |______________________________________________________________________^
[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] help: try
[INFO] [stderr]     |
[INFO] [stderr] 315 |             } else if !(buf[i] as char < 'a' && buf[i] as char < 'A' || buf[i] as char > 'z') {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 315 |             } else if (buf[i] as char >= 'a' || buf[i] as char >= 'A') && buf[i] as char <= 'z' {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/tokenizer.rs:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |         i + 1;
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: statement with no effect
[INFO] [stderr]    --> src/tokenizer.rs:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |         i + 1;
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::no_effect)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#no_effect
[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/tokenizer.rs:336:27
[INFO] [stderr]     |
[INFO] [stderr] 336 | fn tokenize_division(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                           ^^^^^^^^ help: change this to: `&[u8]`
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/tokenizer.rs:341:13
[INFO] [stderr]     |
[INFO] [stderr] 341 |             i = i + 1;
[INFO] [stderr]     |             ^^^^^^^^^ help: replace it with: `i += 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/tokenizer.rs:352:13
[INFO] [stderr]     |
[INFO] [stderr] 352 |             i = i+1;
[INFO] [stderr]     |             ^^^^^^^ help: replace it with: `i += 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: manual implementation of an assign operation
[INFO] [stderr]    --> src/tokenizer.rs:356:21
[INFO] [stderr]     |
[INFO] [stderr] 356 |                     i = i + 2;
[INFO] [stderr]     |                     ^^^^^^^^^ help: replace it with: `i += 2`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/tokenizer.rs:371:26
[INFO] [stderr]     |
[INFO] [stderr] 371 | fn tokenize_integer(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                          ^^^^^^^^ help: change this to: `&[u8]`
[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: this boolean expression can be simplified
[INFO] [stderr]    --> src/tokenizer.rs:388:19
[INFO] [stderr]     |
[INFO] [stderr] 388 |           } else if (buf[i] as char >= 'a' && buf[i] as char <= 'z') ||
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 389 | |                   (buf[i] as char >= 'A' && buf[i] as char <= 'z') {
[INFO] [stderr]     | |__________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 388 |         } else if !(buf[i] as char < 'a' && buf[i] as char < 'A' || buf[i] as char > 'z') {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 388 |         } else if (buf[i] as char >= 'a' || buf[i] as char >= 'A') && buf[i] as char <= 'z' {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/tokenizer.rs:406:26
[INFO] [stderr]     |
[INFO] [stderr] 406 | fn tokenize_keyword(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                          ^^^^^^^^ help: change this to: `&[u8]`
[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/tokenizer.rs:454:29
[INFO] [stderr]     |
[INFO] [stderr] 454 | fn tokenize_identifier(buf: &Vec<u8>, state: &mut usize) -> Token {
[INFO] [stderr]     |                             ^^^^^^^^ help: change this to: `&[u8]`
[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: this boolean expression can be simplified
[INFO] [stderr]    --> src/tokenizer.rs:485:19
[INFO] [stderr]     |
[INFO] [stderr] 485 |           } else if (buf[i] as char >= 'a' && buf[i] as char <= 'z') ||
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 486 | |                   (buf[i] as char >= 'A' && buf[i] as char <= 'z') {
[INFO] [stderr]     | |__________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 485 |         } else if !(buf[i] as char < 'a' && buf[i] as char < 'A' || buf[i] as char > 'z') {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 485 |         } else if (buf[i] as char >= 'a' || buf[i] as char >= 'A') && buf[i] as char <= 'z' {
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/executor.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 | /     match tree.get_token() {
[INFO] [stderr] 104 | |         &Token::Identifier(ref i) => {
[INFO] [stderr] 105 | |             id_flag = true;
[INFO] [stderr] 106 | |             match_flag = true;
[INFO] [stderr] 107 | |         },
[INFO] [stderr] 108 | |         _ => print!("")
[INFO] [stderr] 109 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 103 |     match *tree.get_token() {
[INFO] [stderr] 104 |         Token::Identifier(ref i) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/executor.rs:161:50
[INFO] [stderr]     |
[INFO] [stderr] 161 |         tree.insert_variable(current_id.clone(), result.clone());
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: try removing the `clone` call: `result`
[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: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/executor.rs:248:31
[INFO] [stderr]     |
[INFO] [stderr] 248 |     let mut start_state:u32 = tree.state.clone();
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `tree.state`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/executor.rs:486:9
[INFO] [stderr]     |
[INFO] [stderr] 486 | /         match tree.get_token() {
[INFO] [stderr] 487 | |             &Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 488 | |             &Token::Integer(ref i) => int_flag = true,
[INFO] [stderr] 489 | |             _ => panic!("execute_op: token is not identifier")
[INFO] [stderr] 490 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 486 |         match *tree.get_token() {
[INFO] [stderr] 487 |             Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 488 |             Token::Integer(ref i) => int_flag = true,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/executor.rs:515:5
[INFO] [stderr]     |
[INFO] [stderr] 515 | /     match tree.get_token() {
[INFO] [stderr] 516 | |         &Token::LogicalEquality => {
[INFO] [stderr] 517 | |             result = 0;
[INFO] [stderr] 518 | |         },
[INFO] [stderr] ...   |
[INFO] [stderr] 534 | |         _ => panic!("execute_comp_op: unexpected comp op")
[INFO] [stderr] 535 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 515 |     match *tree.get_token() {
[INFO] [stderr] 516 |         Token::LogicalEquality => {
[INFO] [stderr] 517 |             result = 0;
[INFO] [stderr] 518 |         },
[INFO] [stderr] 519 |         Token::LogicalInequality => {
[INFO] [stderr] 520 |             result = 1;
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:196:5
[INFO] [stderr]     |
[INFO] [stderr] 196 | /     match tree.get_token() {
[INFO] [stderr] 197 | |         &Token::Identifier(ref i) => {
[INFO] [stderr] 198 | |             id_flag = true;
[INFO] [stderr] 199 | |             match_flag = true;
[INFO] [stderr] 200 | |         },
[INFO] [stderr] 201 | |         _ => print!("")
[INFO] [stderr] 202 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 196 |     match *tree.get_token() {
[INFO] [stderr] 197 |         Token::Identifier(ref i) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/parser.rs:256:50
[INFO] [stderr]     |
[INFO] [stderr] 256 |         tree.insert_variable(current_id.clone(), result.clone());
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: try removing the `clone` call: `result`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:552:9
[INFO] [stderr]     |
[INFO] [stderr] 552 | /         match tree.get_token() {
[INFO] [stderr] 553 | |             &Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 554 | |             &Token::Integer(ref i) => int_flag = true,
[INFO] [stderr] 555 | |             _ => panic!("parse_op: token is not identifier")
[INFO] [stderr] 556 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 552 |         match *tree.get_token() {
[INFO] [stderr] 553 |             Token::Identifier(ref id) => id_flag = true,
[INFO] [stderr] 554 |             Token::Integer(ref i) => int_flag = true,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:581:5
[INFO] [stderr]     |
[INFO] [stderr] 581 | /     match tree.get_token() {
[INFO] [stderr] 582 | |         &Token::LogicalEquality => {
[INFO] [stderr] 583 | |             tree.current_statement.push_str(" == ");
[INFO] [stderr] 584 | |             result = 0;
[INFO] [stderr] ...   |
[INFO] [stderr] 606 | |         _ => panic!("parse_comp_op: unexpected comp op")
[INFO] [stderr] 607 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 581 |     match *tree.get_token() {
[INFO] [stderr] 582 |         Token::LogicalEquality => {
[INFO] [stderr] 583 |             tree.current_statement.push_str(" == ");
[INFO] [stderr] 584 |             result = 0;
[INFO] [stderr] 585 |         },
[INFO] [stderr] 586 |         Token::LogicalInequality => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/main.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let ref file: String = args[1];
[INFO] [stderr]    |         ----^^^^^^^^------------------- help: try: `let file: &String = &args[1];`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "0159f3c81fc11032ace18a33a083d24a7e4f34b69f8ff3fe51c9438b76d334f9"`
[INFO] running `"docker" "rm" "-f" "0159f3c81fc11032ace18a33a083d24a7e4f34b69f8ff3fe51c9438b76d334f9"`
[INFO] [stdout] 0159f3c81fc11032ace18a33a083d24a7e4f34b69f8ff3fe51c9438b76d334f9