[INFO] updating cached repository quells/rcc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/quells/rcc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/quells/rcc" "work/ex/clippy-test-run/sources/stable/gh/quells/rcc"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/quells/rcc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/quells/rcc" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/quells/rcc"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/quells/rcc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a19454b6b33872efb5c3c6e3a7941accfb6246cd
[INFO] sha for GitHub repo quells/rcc: a19454b6b33872efb5c3c6e3a7941accfb6246cd
[INFO] validating manifest of quells/rcc 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 quells/rcc 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 quells/rcc
[INFO] finished frobbing quells/rcc
[INFO] frobbed toml for quells/rcc written to work/ex/clippy-test-run/sources/stable/gh/quells/rcc/Cargo.toml
[INFO] started frobbing quells/rcc
[INFO] finished frobbing quells/rcc
[INFO] frobbed toml for quells/rcc written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/quells/rcc/Cargo.toml
[INFO] crate quells/rcc 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 quells/rcc 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-7/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/quells/rcc:/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] ddbfbf83b28de26e1eaef1441fd27c84753ac1fa6ea20a77d0c6917587735b1e
[INFO] running `"docker" "start" "-a" "ddbfbf83b28de26e1eaef1441fd27c84753ac1fa6ea20a77d0c6917587735b1e"`
[INFO] [stderr]     Checking rcc v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lexer.rs:96:28
[INFO] [stderr]     |
[INFO] [stderr] 96  |                       } else {
[INFO] [stderr]     |  ____________________________^
[INFO] [stderr] 97  | |                         if let Ok(n) = i32::from_str(s) {
[INFO] [stderr] 98  | |                             tokens.push(Token::Integer(n));
[INFO] [stderr] 99  | |                         } else {
[INFO] [stderr] 100 | |                             panic!("could not tokenize integer: {}", s)
[INFO] [stderr] 101 | |                         }
[INFO] [stderr] 102 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 96  |                     } else if let Ok(n) = i32::from_str(s) {
[INFO] [stderr] 97  |     tokens.push(Token::Integer(n));
[INFO] [stderr] 98  | } else {
[INFO] [stderr] 99  |     panic!("could not tokenize integer: {}", s)
[INFO] [stderr] 100 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/parser.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | const END_OF_TOKENS: &'static str = "unexpected end of token stream";
[INFO] [stderr]   |                      -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lexer.rs:96:28
[INFO] [stderr]     |
[INFO] [stderr] 96  |                       } else {
[INFO] [stderr]     |  ____________________________^
[INFO] [stderr] 97  | |                         if let Ok(n) = i32::from_str(s) {
[INFO] [stderr] 98  | |                             tokens.push(Token::Integer(n));
[INFO] [stderr] 99  | |                         } else {
[INFO] [stderr] 100 | |                             panic!("could not tokenize integer: {}", s)
[INFO] [stderr] 101 | |                         }
[INFO] [stderr] 102 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 96  |                     } else if let Ok(n) = i32::from_str(s) {
[INFO] [stderr] 97  |     tokens.push(Token::Integer(n));
[INFO] [stderr] 98  | } else {
[INFO] [stderr] 99  |     panic!("could not tokenize integer: {}", s)
[INFO] [stderr] 100 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/parser.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | const END_OF_TOKENS: &'static str = "unexpected end of token stream";
[INFO] [stderr]   |                      -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lexer.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | /         match self {
[INFO] [stderr] 14 | |             &KeywordToken::Int => write!(f, "<INT>"),
[INFO] [stderr] 15 | |             &KeywordToken::Return => write!(f, "<RETURN>"),
[INFO] [stderr] 16 | |         }
[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] 13 |         match *self {
[INFO] [stderr] 14 |             KeywordToken::Int => write!(f, "<INT>"),
[INFO] [stderr] 15 |             KeywordToken::Return => write!(f, "<RETURN>"),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lexer.rs:87:20
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 if buffer.len() > 0 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!buffer.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 don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lexer.rs:106:17
[INFO] [stderr]     |
[INFO] [stderr] 106 | /                 match single_char_token {
[INFO] [stderr] 107 | |                     &Token::Whitespace => (),
[INFO] [stderr] 108 | |                     _ => tokens.push((*single_char_token).clone()),
[INFO] [stderr] 109 | |                 }
[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] 106 |                 match *single_char_token {
[INFO] [stderr] 107 |                     Token::Whitespace => (),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lexer.rs:113:24
[INFO] [stderr]     |
[INFO] [stderr] 113 |                     if buffer.len() == 0 {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `buffer.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 | /         match self {
[INFO] [stderr] 12 | |             &Program::Function(ref func) => write!(f, "{:?}", func),
[INFO] [stderr] 13 | |         }
[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] 11 |         match *self {
[INFO] [stderr] 12 |             Program::Function(ref func) => write!(f, "{:?}", func),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 | /         match self {
[INFO] [stderr] 23 | |             &Function::IntVoid(ref id, ref s) => write!(f, "int {}:<{:?}>", id, s),
[INFO] [stderr] 24 | |         }
[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] 22 |         match *self {
[INFO] [stderr] 23 |             Function::IntVoid(ref id, ref s) => write!(f, "int {}:<{:?}>", id, s),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         match self {
[INFO] [stderr] 34 | |             &Statement::Return(ref e) => write!(f, "return {:?}", e),
[INFO] [stderr] 35 | |         }
[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] 33 |         match *self {
[INFO] [stderr] 34 |             Statement::Return(ref e) => write!(f, "return {:?}", e),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 | /         match self {
[INFO] [stderr] 46 | |             &Expr::Term(ref t) => write!(f, "{:?}", t),
[INFO] [stderr] 47 | |             &Expr::BinOp(ref a, ref op, ref b) => write!(f, "expr({:?}{:?}{:?})", a, op, b),
[INFO] [stderr] 48 | |         }
[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] 45 |         match *self {
[INFO] [stderr] 46 |             Expr::Term(ref t) => write!(f, "{:?}", t),
[INFO] [stderr] 47 |             Expr::BinOp(ref a, ref op, ref b) => write!(f, "expr({:?}{:?}{:?})", a, op, b),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 | /         match self {
[INFO] [stderr] 59 | |             &Term::Factor(ref x) => write!(f, "{:?}", x),
[INFO] [stderr] 60 | |             &Term::BinOp(ref a, ref op, ref b) => write!(f, "term({:?}{:?}{:?})", a, op, b),
[INFO] [stderr] 61 | |         }
[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] 58 |         match *self {
[INFO] [stderr] 59 |             Term::Factor(ref x) => write!(f, "{:?}", x),
[INFO] [stderr] 60 |             Term::BinOp(ref a, ref op, ref b) => write!(f, "term({:?}{:?}{:?})", a, op, b),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 | /         match self {
[INFO] [stderr] 73 | |             &Factor::Expr(ref e) => write!(f, "{:?}", e),
[INFO] [stderr] 74 | |             &Factor::UnOp(ref op, ref x) => write!(f, "{:?}{:?}", op, x),
[INFO] [stderr] 75 | |             &Factor::Int(ref i) => write!(f, "{}", i),
[INFO] [stderr] 76 | |         }
[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] 72 |         match *self {
[INFO] [stderr] 73 |             Factor::Expr(ref e) => write!(f, "{:?}", e),
[INFO] [stderr] 74 |             Factor::UnOp(ref op, ref x) => write!(f, "{:?}{:?}", op, x),
[INFO] [stderr] 75 |             Factor::Int(ref i) => write!(f, "{}", i),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 | /         match self {
[INFO] [stderr] 88 | |             &UnaryOp::Negation => write!(f, "-"),
[INFO] [stderr] 89 | |             &UnaryOp::BitwiseComplement => write!(f, "~"),
[INFO] [stderr] 90 | |             &UnaryOp::LogicalNegation => write!(f, "!"),
[INFO] [stderr] 91 | |         }
[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] 87 |         match *self {
[INFO] [stderr] 88 |             UnaryOp::Negation => write!(f, "-"),
[INFO] [stderr] 89 |             UnaryOp::BitwiseComplement => write!(f, "~"),
[INFO] [stderr] 90 |             UnaryOp::LogicalNegation => write!(f, "!"),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 | /         match self {
[INFO] [stderr] 104 | |             &BinaryOp::Addition => write!(f, "+"),
[INFO] [stderr] 105 | |             &BinaryOp::Subtraction => write!(f, "-"),
[INFO] [stderr] 106 | |             &BinaryOp::Multiplication => write!(f, "*"),
[INFO] [stderr] 107 | |             &BinaryOp::Division => write!(f, "/"),
[INFO] [stderr] 108 | |         }
[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] 103 |         match *self {
[INFO] [stderr] 104 |             BinaryOp::Addition => write!(f, "+"),
[INFO] [stderr] 105 |             BinaryOp::Subtraction => write!(f, "-"),
[INFO] [stderr] 106 |             BinaryOp::Multiplication => write!(f, "*"),
[INFO] [stderr] 107 |             BinaryOp::Division => write!(f, "/"),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:121:21
[INFO] [stderr]     |
[INFO] [stderr] 121 |         None => Err(format!("{}", END_OF_TOKENS)),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `END_OF_TOKENS.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:139:45
[INFO] [stderr]     |
[INFO] [stderr] 139 |                                 None => Err(format!("{}", END_OF_TOKENS)),
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `END_OF_TOKENS.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:167:21
[INFO] [stderr]     |
[INFO] [stderr] 167 |         None => Err(format!("expected one of (!~-0123456789, found none")),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"expected one of (!~-0123456789, found none".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:175:13
[INFO] [stderr]     |
[INFO] [stderr] 175 | /             loop {
[INFO] [stderr] 176 | |                 match outer.split_first() {
[INFO] [stderr] 177 | |                     Some((next, rest)) => {
[INFO] [stderr] 178 | |                         match next {
[INFO] [stderr] ...   |
[INFO] [stderr] 203 | |                 }
[INFO] [stderr] 204 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Some((next, rest)) = outer.split_first() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:215:13
[INFO] [stderr]     |
[INFO] [stderr] 215 | /             loop {
[INFO] [stderr] 216 | |                 match outer.split_first() {
[INFO] [stderr] 217 | |                     Some((next, rest)) => {
[INFO] [stderr] 218 | |                         match next {
[INFO] [stderr] ...   |
[INFO] [stderr] 245 | |                 }
[INFO] [stderr] 246 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Some((next, rest)) = outer.split_first() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:274:5
[INFO] [stderr]     |
[INFO] [stderr] 274 | /     loop {
[INFO] [stderr] 275 | |         match parse_statement(outer) {
[INFO] [stderr] 276 | |             Ok((statement, rest)) => {
[INFO] [stderr] 277 | |                 statements.push(statement);
[INFO] [stderr] ...   |
[INFO] [stderr] 281 | |         }
[INFO] [stderr] 282 | |     }
[INFO] [stderr]     | |_____^ help: try: `while let Ok((statement, rest)) = parse_statement(outer) { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:327:34
[INFO] [stderr]     |
[INFO] [stderr] 327 |                         _ => Err(format!("missing expected identifier token")),
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"missing expected identifier token".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:330:29
[INFO] [stderr]     |
[INFO] [stderr] 330 |                 None => Err(format!("{}", END_OF_TOKENS)),
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `END_OF_TOKENS.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: useless use of `format!`
[INFO] [stderr]  --> src/generator_gas.rs:5:30
[INFO] [stderr]   |
[INFO] [stderr] 5 |         UnaryOp::Negation => format!("  neg     %eax        /* Negate EAX */"),
[INFO] [stderr]   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"  neg     %eax        /* Negate EAX */".to_string()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]  --> src/generator_gas.rs:6:39
[INFO] [stderr]   |
[INFO] [stderr] 6 |         UnaryOp::BitwiseComplement => format!("  not     %eax        /* Bitwise Complement EAX */"),
[INFO] [stderr]   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"  not     %eax        /* Bitwise Complement EAX */".to_string()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/generator_gas.rs:7:37
[INFO] [stderr]    |
[INFO] [stderr] 7  |           UnaryOp::LogicalNegation => format!(r"  cmpl    $0, %eax    /* ZF to (exp == 0) */
[INFO] [stderr]    |  _____________________________________^
[INFO] [stderr] 8  | |   movl    $0, %eax    /* zero out EAX without changing FLAGS */
[INFO] [stderr] 9  | |   sete    %al         /* set AL register (low byte of EAX) to (ZF == true) */
[INFO] [stderr] 10 | |                       /* EAX is logically negated */"),
[INFO] [stderr]    | |______________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 7  |         UnaryOp::LogicalNegation => r"  cmpl    $0, %eax    /* ZF to (exp == 0) */
[INFO] [stderr] 8  |   movl    $0, %eax    /* zero out EAX without changing FLAGS */
[INFO] [stderr] 9  |   sete    %al         /* set AL register (low byte of EAX) to (ZF == true) */
[INFO] [stderr] 10 |                       /* EAX is logically negated */".to_string(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lexer.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | /         match self {
[INFO] [stderr] 14 | |             &KeywordToken::Int => write!(f, "<INT>"),
[INFO] [stderr] 15 | |             &KeywordToken::Return => write!(f, "<RETURN>"),
[INFO] [stderr] 16 | |         }
[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] 13 |         match *self {
[INFO] [stderr] 14 |             KeywordToken::Int => write!(f, "<INT>"),
[INFO] [stderr] 15 |             KeywordToken::Return => write!(f, "<RETURN>"),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/lib.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     dest_file.write((&asm).as_bytes())?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::unused_io_amount)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lexer.rs:87:20
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 if buffer.len() > 0 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!buffer.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 don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lexer.rs:106:17
[INFO] [stderr]     |
[INFO] [stderr] 106 | /                 match single_char_token {
[INFO] [stderr] 107 | |                     &Token::Whitespace => (),
[INFO] [stderr] 108 | |                     _ => tokens.push((*single_char_token).clone()),
[INFO] [stderr] 109 | |                 }
[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] 106 |                 match *single_char_token {
[INFO] [stderr] 107 |                     Token::Whitespace => (),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lexer.rs:113:24
[INFO] [stderr]     |
[INFO] [stderr] 113 |                     if buffer.len() == 0 {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `buffer.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 | /         match self {
[INFO] [stderr] 12 | |             &Program::Function(ref func) => write!(f, "{:?}", func),
[INFO] [stderr] 13 | |         }
[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] 11 |         match *self {
[INFO] [stderr] 12 |             Program::Function(ref func) => write!(f, "{:?}", func),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rcc`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 | /         match self {
[INFO] [stderr] 23 | |             &Function::IntVoid(ref id, ref s) => write!(f, "int {}:<{:?}>", id, s),
[INFO] [stderr] 24 | |         }
[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] 22 |         match *self {
[INFO] [stderr] 23 |             Function::IntVoid(ref id, ref s) => write!(f, "int {}:<{:?}>", id, s),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         match self {
[INFO] [stderr] 34 | |             &Statement::Return(ref e) => write!(f, "return {:?}", e),
[INFO] [stderr] 35 | |         }
[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] 33 |         match *self {
[INFO] [stderr] 34 |             Statement::Return(ref e) => write!(f, "return {:?}", e),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 | /         match self {
[INFO] [stderr] 46 | |             &Expr::Term(ref t) => write!(f, "{:?}", t),
[INFO] [stderr] 47 | |             &Expr::BinOp(ref a, ref op, ref b) => write!(f, "expr({:?}{:?}{:?})", a, op, b),
[INFO] [stderr] 48 | |         }
[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] 45 |         match *self {
[INFO] [stderr] 46 |             Expr::Term(ref t) => write!(f, "{:?}", t),
[INFO] [stderr] 47 |             Expr::BinOp(ref a, ref op, ref b) => write!(f, "expr({:?}{:?}{:?})", a, op, b),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 | /         match self {
[INFO] [stderr] 59 | |             &Term::Factor(ref x) => write!(f, "{:?}", x),
[INFO] [stderr] 60 | |             &Term::BinOp(ref a, ref op, ref b) => write!(f, "term({:?}{:?}{:?})", a, op, b),
[INFO] [stderr] 61 | |         }
[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] 58 |         match *self {
[INFO] [stderr] 59 |             Term::Factor(ref x) => write!(f, "{:?}", x),
[INFO] [stderr] 60 |             Term::BinOp(ref a, ref op, ref b) => write!(f, "term({:?}{:?}{:?})", a, op, b),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 | /         match self {
[INFO] [stderr] 73 | |             &Factor::Expr(ref e) => write!(f, "{:?}", e),
[INFO] [stderr] 74 | |             &Factor::UnOp(ref op, ref x) => write!(f, "{:?}{:?}", op, x),
[INFO] [stderr] 75 | |             &Factor::Int(ref i) => write!(f, "{}", i),
[INFO] [stderr] 76 | |         }
[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] 72 |         match *self {
[INFO] [stderr] 73 |             Factor::Expr(ref e) => write!(f, "{:?}", e),
[INFO] [stderr] 74 |             Factor::UnOp(ref op, ref x) => write!(f, "{:?}{:?}", op, x),
[INFO] [stderr] 75 |             Factor::Int(ref i) => write!(f, "{}", i),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 | /         match self {
[INFO] [stderr] 88 | |             &UnaryOp::Negation => write!(f, "-"),
[INFO] [stderr] 89 | |             &UnaryOp::BitwiseComplement => write!(f, "~"),
[INFO] [stderr] 90 | |             &UnaryOp::LogicalNegation => write!(f, "!"),
[INFO] [stderr] 91 | |         }
[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] 87 |         match *self {
[INFO] [stderr] 88 |             UnaryOp::Negation => write!(f, "-"),
[INFO] [stderr] 89 |             UnaryOp::BitwiseComplement => write!(f, "~"),
[INFO] [stderr] 90 |             UnaryOp::LogicalNegation => write!(f, "!"),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/parser.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 | /         match self {
[INFO] [stderr] 104 | |             &BinaryOp::Addition => write!(f, "+"),
[INFO] [stderr] 105 | |             &BinaryOp::Subtraction => write!(f, "-"),
[INFO] [stderr] 106 | |             &BinaryOp::Multiplication => write!(f, "*"),
[INFO] [stderr] 107 | |             &BinaryOp::Division => write!(f, "/"),
[INFO] [stderr] 108 | |         }
[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] 103 |         match *self {
[INFO] [stderr] 104 |             BinaryOp::Addition => write!(f, "+"),
[INFO] [stderr] 105 |             BinaryOp::Subtraction => write!(f, "-"),
[INFO] [stderr] 106 |             BinaryOp::Multiplication => write!(f, "*"),
[INFO] [stderr] 107 |             BinaryOp::Division => write!(f, "/"),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:121:21
[INFO] [stderr]     |
[INFO] [stderr] 121 |         None => Err(format!("{}", END_OF_TOKENS)),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `END_OF_TOKENS.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:139:45
[INFO] [stderr]     |
[INFO] [stderr] 139 |                                 None => Err(format!("{}", END_OF_TOKENS)),
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `END_OF_TOKENS.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:167:21
[INFO] [stderr]     |
[INFO] [stderr] 167 |         None => Err(format!("expected one of (!~-0123456789, found none")),
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"expected one of (!~-0123456789, found none".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:175:13
[INFO] [stderr]     |
[INFO] [stderr] 175 | /             loop {
[INFO] [stderr] 176 | |                 match outer.split_first() {
[INFO] [stderr] 177 | |                     Some((next, rest)) => {
[INFO] [stderr] 178 | |                         match next {
[INFO] [stderr] ...   |
[INFO] [stderr] 203 | |                 }
[INFO] [stderr] 204 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Some((next, rest)) = outer.split_first() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:215:13
[INFO] [stderr]     |
[INFO] [stderr] 215 | /             loop {
[INFO] [stderr] 216 | |                 match outer.split_first() {
[INFO] [stderr] 217 | |                     Some((next, rest)) => {
[INFO] [stderr] 218 | |                         match next {
[INFO] [stderr] ...   |
[INFO] [stderr] 245 | |                 }
[INFO] [stderr] 246 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Some((next, rest)) = outer.split_first() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:274:5
[INFO] [stderr]     |
[INFO] [stderr] 274 | /     loop {
[INFO] [stderr] 275 | |         match parse_statement(outer) {
[INFO] [stderr] 276 | |             Ok((statement, rest)) => {
[INFO] [stderr] 277 | |                 statements.push(statement);
[INFO] [stderr] ...   |
[INFO] [stderr] 281 | |         }
[INFO] [stderr] 282 | |     }
[INFO] [stderr]     | |_____^ help: try: `while let Ok((statement, rest)) = parse_statement(outer) { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:327:34
[INFO] [stderr]     |
[INFO] [stderr] 327 |                         _ => Err(format!("missing expected identifier token")),
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"missing expected identifier token".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/parser.rs:330:29
[INFO] [stderr]     |
[INFO] [stderr] 330 |                 None => Err(format!("{}", END_OF_TOKENS)),
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `END_OF_TOKENS.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: useless use of `format!`
[INFO] [stderr]  --> src/generator_gas.rs:5:30
[INFO] [stderr]   |
[INFO] [stderr] 5 |         UnaryOp::Negation => format!("  neg     %eax        /* Negate EAX */"),
[INFO] [stderr]   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"  neg     %eax        /* Negate EAX */".to_string()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]  --> src/generator_gas.rs:6:39
[INFO] [stderr]   |
[INFO] [stderr] 6 |         UnaryOp::BitwiseComplement => format!("  not     %eax        /* Bitwise Complement EAX */"),
[INFO] [stderr]   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"  not     %eax        /* Bitwise Complement EAX */".to_string()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/generator_gas.rs:7:37
[INFO] [stderr]    |
[INFO] [stderr] 7  |           UnaryOp::LogicalNegation => format!(r"  cmpl    $0, %eax    /* ZF to (exp == 0) */
[INFO] [stderr]    |  _____________________________________^
[INFO] [stderr] 8  | |   movl    $0, %eax    /* zero out EAX without changing FLAGS */
[INFO] [stderr] 9  | |   sete    %al         /* set AL register (low byte of EAX) to (ZF == true) */
[INFO] [stderr] 10 | |                       /* EAX is logically negated */"),
[INFO] [stderr]    | |______________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 7  |         UnaryOp::LogicalNegation => r"  cmpl    $0, %eax    /* ZF to (exp == 0) */
[INFO] [stderr] 8  |   movl    $0, %eax    /* zero out EAX without changing FLAGS */
[INFO] [stderr] 9  |   sete    %al         /* set AL register (low byte of EAX) to (ZF == true) */
[INFO] [stderr] 10 |                       /* EAX is logically negated */".to_string(),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/lib.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     dest_file.write((&asm).as_bytes())?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::unused_io_amount)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rcc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ddbfbf83b28de26e1eaef1441fd27c84753ac1fa6ea20a77d0c6917587735b1e"`
[INFO] running `"docker" "rm" "-f" "ddbfbf83b28de26e1eaef1441fd27c84753ac1fa6ea20a77d0c6917587735b1e"`
[INFO] [stdout] ddbfbf83b28de26e1eaef1441fd27c84753ac1fa6ea20a77d0c6917587735b1e