[INFO] updating cached repository quells/monkey-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/quells/monkey-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/quells/monkey-rs" "work/ex/clippy-test-run/sources/stable/gh/quells/monkey-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/quells/monkey-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/quells/monkey-rs" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/quells/monkey-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/quells/monkey-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c72db7b1331c354e4352ea71be5ebe3c905e9c62
[INFO] sha for GitHub repo quells/monkey-rs: c72db7b1331c354e4352ea71be5ebe3c905e9c62
[INFO] validating manifest of quells/monkey-rs 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/monkey-rs 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/monkey-rs
[INFO] finished frobbing quells/monkey-rs
[INFO] frobbed toml for quells/monkey-rs written to work/ex/clippy-test-run/sources/stable/gh/quells/monkey-rs/Cargo.toml
[INFO] started frobbing quells/monkey-rs
[INFO] finished frobbing quells/monkey-rs
[INFO] frobbed toml for quells/monkey-rs written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/quells/monkey-rs/Cargo.toml
[INFO] crate quells/monkey-rs 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/monkey-rs 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-0/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/monkey-rs:/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] c94170fbc4c8b428b9882c1538fe04bb3d36cc5340a4ea700b7edde6b379e005
[INFO] running `"docker" "start" "-a" "c94170fbc4c8b428b9882c1538fe04bb3d36cc5340a4ea700b7edde6b379e005"`
[INFO] [stderr]     Checking monkey v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             kind: kind,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `kind`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |             line: line,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `line`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |             character: character,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `character`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |             kind: kind,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `kind`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lex.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 179 |             len: len,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `len`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lex.rs:184:13
[INFO] [stderr]     |
[INFO] [stderr] 184 |             keywords: keywords,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `keywords`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             kind: kind,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `kind`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |             line: line,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `line`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |             character: character,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `character`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lex.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |             kind: kind,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `kind`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lex.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 179 |             len: len,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `len`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lex.rs:184:13
[INFO] [stderr]     |
[INFO] [stderr] 184 |             keywords: keywords,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `keywords`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/lex.rs:82:35
[INFO] [stderr]    |
[INFO] [stderr] 82 |             TokenKind::Integer => format!("{}", self.literal),
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `self.literal.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 `vec!`
[INFO] [stderr]    --> src/lex.rs:165:23
[INFO] [stderr]     |
[INFO] [stderr] 165 |           for (s, t) in vec![
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 166 | |             ("let", TokenKind::Let),
[INFO] [stderr] 167 | |             ("fn", TokenKind::Function),
[INFO] [stderr] 168 | |             ("if", TokenKind::If),
[INFO] [stderr] ...   |
[INFO] [stderr] 172 | |             ("false", TokenKind::False),
[INFO] [stderr] 173 | |         ] {
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_vec)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr]     = 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: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lex.rs:219:9
[INFO] [stderr]     |
[INFO] [stderr] 219 | /         loop {
[INFO] [stderr] 220 | |             let c = match self.read() {
[INFO] [stderr] 221 | |                 Some(c) => c,
[INFO] [stderr] 222 | |                 None => break,
[INFO] [stderr] ...   |
[INFO] [stderr] 289 | |             }
[INFO] [stderr] 290 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(c) = self.read() { .. }`
[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: length comparison to zero
[INFO] [stderr]    --> src/lex.rs:225:20
[INFO] [stderr]     |
[INFO] [stderr] 225 |                 if literal.len() == 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `literal.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lex.rs:231:16
[INFO] [stderr]     |
[INFO] [stderr] 231 |             if literal.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `literal.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]    --> src/lex.rs:243:40
[INFO] [stderr]     |
[INFO] [stderr] 243 |                 let default = possible.into_iter()
[INFO] [stderr]     |                                        ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/lex.rs:249:23
[INFO] [stderr]     |
[INFO] [stderr] 249 |                   match possible.into_iter()
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 250 | |                 .filter(|(pc, _)| option_eq(*pc, next_c))
[INFO] [stderr] 251 | |                 .next() {
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]     = note: replace `filter(|(pc, _)| option_eq(*pc, next_c)).next()` with `find(|(pc, _)| option_eq(*pc, next_c))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]    --> src/lex.rs:249:32
[INFO] [stderr]     |
[INFO] [stderr] 249 |                 match possible.into_iter()
[INFO] [stderr]     |                                ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lex.rs:283:13
[INFO] [stderr]     |
[INFO] [stderr] 283 | /             match kind {
[INFO] [stderr] 284 | |                 TokenKind::EOF => {
[INFO] [stderr] 285 | |                     kind = TokenKind::Illegal;
[INFO] [stderr] 286 | |                     break;
[INFO] [stderr] 287 | |                 },
[INFO] [stderr] 288 | |                 _ => (),
[INFO] [stderr] 289 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 283 |             if let TokenKind::EOF = kind {
[INFO] [stderr] 284 |     kind = TokenKind::Illegal;
[INFO] [stderr] 285 |     break;
[INFO] [stderr] 286 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lex.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 | /     loop {
[INFO] [stderr] 311 | |         match lexer.next_token() {
[INFO] [stderr] 312 | |             Some(t) => tokens.push(t),
[INFO] [stderr] 313 | |             None => break,
[INFO] [stderr] 314 | |         }
[INFO] [stderr] 315 | |     }
[INFO] [stderr]     | |_____^ help: try: `while let Some(t) = lexer.next_token() { .. }`
[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 .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/lex.rs:324:28
[INFO] [stderr]     |
[INFO] [stderr] 324 |     for (e, a) in expected.into_iter().zip(actual) {
[INFO] [stderr]     |                            ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]  --> src/repl.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     match prompt {
[INFO] [stderr] 5 | |         Some(p) => print!("{}", p),
[INFO] [stderr] 6 | |         None => (),
[INFO] [stderr] 7 | |     }
[INFO] [stderr]   | |_____^ help: try this: `if let Some(p) = prompt { print!("{}", p) }`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/lex.rs:82:35
[INFO] [stderr]    |
[INFO] [stderr] 82 |             TokenKind::Integer => format!("{}", self.literal),
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `self.literal.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: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/lex.rs:128:18
[INFO] [stderr]     |
[INFO] [stderr] 128 |           let op = match expected {
[INFO] [stderr]     |  __________________^
[INFO] [stderr] 129 | |             true => "==",
[INFO] [stderr] 130 | |             false => "!=",
[INFO] [stderr] 131 | |         };
[INFO] [stderr]     | |_________^ help: consider using an if/else expression: `if expected { "==" } else { "!=" }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]    --> src/lex.rs:165:23
[INFO] [stderr]     |
[INFO] [stderr] 165 |           for (s, t) in vec![
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 166 | |             ("let", TokenKind::Let),
[INFO] [stderr] 167 | |             ("fn", TokenKind::Function),
[INFO] [stderr] 168 | |             ("if", TokenKind::If),
[INFO] [stderr] ...   |
[INFO] [stderr] 172 | |             ("false", TokenKind::False),
[INFO] [stderr] 173 | |         ] {
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_vec)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr]     = 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: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lex.rs:219:9
[INFO] [stderr]     |
[INFO] [stderr] 219 | /         loop {
[INFO] [stderr] 220 | |             let c = match self.read() {
[INFO] [stderr] 221 | |                 Some(c) => c,
[INFO] [stderr] 222 | |                 None => break,
[INFO] [stderr] ...   |
[INFO] [stderr] 289 | |             }
[INFO] [stderr] 290 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(c) = self.read() { .. }`
[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: length comparison to zero
[INFO] [stderr]    --> src/lex.rs:225:20
[INFO] [stderr]     |
[INFO] [stderr] 225 |                 if literal.len() == 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `literal.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lex.rs:231:16
[INFO] [stderr]     |
[INFO] [stderr] 231 |             if literal.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `literal.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]    --> src/lex.rs:243:40
[INFO] [stderr]     |
[INFO] [stderr] 243 |                 let default = possible.into_iter()
[INFO] [stderr]     |                                        ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/lex.rs:249:23
[INFO] [stderr]     |
[INFO] [stderr] 249 |                   match possible.into_iter()
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 250 | |                 .filter(|(pc, _)| option_eq(*pc, next_c))
[INFO] [stderr] 251 | |                 .next() {
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]     = note: replace `filter(|(pc, _)| option_eq(*pc, next_c)).next()` with `find(|(pc, _)| option_eq(*pc, next_c))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]    --> src/lex.rs:249:32
[INFO] [stderr]     |
[INFO] [stderr] 249 |                 match possible.into_iter()
[INFO] [stderr]     |                                ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lex.rs:283:13
[INFO] [stderr]     |
[INFO] [stderr] 283 | /             match kind {
[INFO] [stderr] 284 | |                 TokenKind::EOF => {
[INFO] [stderr] 285 | |                     kind = TokenKind::Illegal;
[INFO] [stderr] 286 | |                     break;
[INFO] [stderr] 287 | |                 },
[INFO] [stderr] 288 | |                 _ => (),
[INFO] [stderr] 289 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 283 |             if let TokenKind::EOF = kind {
[INFO] [stderr] 284 |     kind = TokenKind::Illegal;
[INFO] [stderr] 285 |     break;
[INFO] [stderr] 286 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lex.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 | /     loop {
[INFO] [stderr] 311 | |         match lexer.next_token() {
[INFO] [stderr] 312 | |             Some(t) => tokens.push(t),
[INFO] [stderr] 313 | |             None => break,
[INFO] [stderr] 314 | |         }
[INFO] [stderr] 315 | |     }
[INFO] [stderr]     | |_____^ help: try: `while let Some(t) = lexer.next_token() { .. }`
[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 .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/lex.rs:324:28
[INFO] [stderr]     |
[INFO] [stderr] 324 |     for (e, a) in expected.into_iter().zip(actual) {
[INFO] [stderr]     |                            ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]  --> src/repl.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     match prompt {
[INFO] [stderr] 5 | |         Some(p) => print!("{}", p),
[INFO] [stderr] 6 | |         None => (),
[INFO] [stderr] 7 | |     }
[INFO] [stderr]   | |_____^ help: try this: `if let Some(p) = prompt { print!("{}", p) }`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "c94170fbc4c8b428b9882c1538fe04bb3d36cc5340a4ea700b7edde6b379e005"`
[INFO] running `"docker" "rm" "-f" "c94170fbc4c8b428b9882c1538fe04bb3d36cc5340a4ea700b7edde6b379e005"`
[INFO] [stdout] c94170fbc4c8b428b9882c1538fe04bb3d36cc5340a4ea700b7edde6b379e005