[INFO] updating cached repository jparoz/huck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jparoz/huck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jparoz/huck" "work/ex/clippy-test-run/sources/stable/gh/jparoz/huck"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/jparoz/huck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jparoz/huck" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jparoz/huck"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jparoz/huck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f6107d31c3b5a8286a3effdfbfde6df6569270d7
[INFO] sha for GitHub repo jparoz/huck: f6107d31c3b5a8286a3effdfbfde6df6569270d7
[INFO] validating manifest of jparoz/huck 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 jparoz/huck 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 jparoz/huck
[INFO] finished frobbing jparoz/huck
[INFO] frobbed toml for jparoz/huck written to work/ex/clippy-test-run/sources/stable/gh/jparoz/huck/Cargo.toml
[INFO] started frobbing jparoz/huck
[INFO] finished frobbing jparoz/huck
[INFO] frobbed toml for jparoz/huck written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jparoz/huck/Cargo.toml
[INFO] crate jparoz/huck 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 jparoz/huck 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/jparoz/huck:/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] 16f9f73601dff051e720aa09327c0a063a301874848216ff6cc75ac1c41bff23
[INFO] running `"docker" "start" "-a" "16f9f73601dff051e720aa09327c0a063a301874848216ff6cc75ac1c41bff23"`
[INFO] [stderr]     Checking huck v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lex.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |             filename: filename,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `filename`
[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:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |             file: file,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `file`
[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:188:41
[INFO] [stderr]     |
[INFO] [stderr] 188 |                                         args: args,
[INFO] [stderr]     |                                         ^^^^^^^^^^ help: replace it with: `args`
[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:281:13
[INFO] [stderr]     |
[INFO] [stderr] 281 |             start: start,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `start`
[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:282:13
[INFO] [stderr]     |
[INFO] [stderr] 282 |             end: end,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `end`
[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:315:13
[INFO] [stderr]     |
[INFO] [stderr] 315 |             filename: filename,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `filename`
[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:316:13
[INFO] [stderr]     |
[INFO] [stderr] 316 |             file: file,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `file`
[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:317:13
[INFO] [stderr]     |
[INFO] [stderr] 317 |             iter: iter,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `iter`
[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:352:13
[INFO] [stderr]     |
[INFO] [stderr] 352 |             typ: typ,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `typ`
[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:465:13
[INFO] [stderr]     |
[INFO] [stderr] 465 |             start: start,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `start`
[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:466:13
[INFO] [stderr]     |
[INFO] [stderr] 466 |             end: end,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `end`
[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/parse.rs:47:33
[INFO] [stderr]    |
[INFO] [stderr] 47 |                                 name: name,
[INFO] [stderr]    |                                 ^^^^^^^^^^ help: replace it with: `name`
[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/parse.rs:49:37
[INFO] [stderr]    |
[INFO] [stderr] 49 |                                     args: args,
[INFO] [stderr]    |                                     ^^^^^^^^^^ help: replace it with: `args`
[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/parse.rs:50:37
[INFO] [stderr]    |
[INFO] [stderr] 50 |                                     rhs: rhs,
[INFO] [stderr]    |                                     ^^^^^^^^ help: replace it with: `rhs`
[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:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |             filename: filename,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `filename`
[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:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |             file: file,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `file`
[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:188:41
[INFO] [stderr]     |
[INFO] [stderr] 188 |                                         args: args,
[INFO] [stderr]     |                                         ^^^^^^^^^^ help: replace it with: `args`
[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:281:13
[INFO] [stderr]     |
[INFO] [stderr] 281 |             start: start,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `start`
[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:282:13
[INFO] [stderr]     |
[INFO] [stderr] 282 |             end: end,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `end`
[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:315:13
[INFO] [stderr]     |
[INFO] [stderr] 315 |             filename: filename,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `filename`
[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:316:13
[INFO] [stderr]     |
[INFO] [stderr] 316 |             file: file,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `file`
[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:317:13
[INFO] [stderr]     |
[INFO] [stderr] 317 |             iter: iter,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `iter`
[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:352:13
[INFO] [stderr]     |
[INFO] [stderr] 352 |             typ: typ,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `typ`
[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:465:13
[INFO] [stderr]     |
[INFO] [stderr] 465 |             start: start,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `start`
[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:466:13
[INFO] [stderr]     |
[INFO] [stderr] 466 |             end: end,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `end`
[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/parse.rs:47:33
[INFO] [stderr]    |
[INFO] [stderr] 47 |                                 name: name,
[INFO] [stderr]    |                                 ^^^^^^^^^^ help: replace it with: `name`
[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/parse.rs:49:37
[INFO] [stderr]    |
[INFO] [stderr] 49 |                                     args: args,
[INFO] [stderr]    |                                     ^^^^^^^^^^ help: replace it with: `args`
[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/parse.rs:50:37
[INFO] [stderr]    |
[INFO] [stderr] 50 |                                     rhs: rhs,
[INFO] [stderr]    |                                     ^^^^^^^^ help: replace it with: `rhs`
[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: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lex.rs:588:28
[INFO] [stderr]     |
[INFO] [stderr] 588 |                       } else {
[INFO] [stderr]     |  ____________________________^
[INFO] [stderr] 589 | |                         if let Some(c) = self.eat() {
[INFO] [stderr] 590 | |                             if c == '`' {
[INFO] [stderr] 591 | |                                 Some(self.snip(Backtick))
[INFO] [stderr] ...   |
[INFO] [stderr] 601 | |                         }
[INFO] [stderr] 602 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lex.rs:588:28
[INFO] [stderr]     |
[INFO] [stderr] 588 |                       } else {
[INFO] [stderr]     |  ____________________________^
[INFO] [stderr] 589 | |                         if let Some(c) = self.eat() {
[INFO] [stderr] 590 | |                             if c == '`' {
[INFO] [stderr] 591 | |                                 Some(self.snip(Backtick))
[INFO] [stderr] ...   |
[INFO] [stderr] 601 | |                         }
[INFO] [stderr] 602 | |                     }
[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] 588 |                     } else if let Some(c) = self.eat() {
[INFO] [stderr] 589 |     if c == '`' {
[INFO] [stderr] 590 |         Some(self.snip(Backtick))
[INFO] [stderr] 591 |     } else {
[INFO] [stderr] 592 |         self.error(format!("Expected '`' to end infix function \
[INFO] [stderr] 593 |                                 call, but found {:?}",
[INFO] [stderr]   ...
[INFO] [stderr] 
[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] 588 |                     } else if let Some(c) = self.eat() {
[INFO] [stderr] 589 |     if c == '`' {
[INFO] [stderr] 590 |         Some(self.snip(Backtick))
[INFO] [stderr] 591 |     } else {
[INFO] [stderr] 592 |         self.error(format!("Expected '`' to end infix function \
[INFO] [stderr] 593 |                                 call, but found {:?}",
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TypeSignature`
[INFO] [stderr]   --> src/ast.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     TypeSignature { names: Vec<&'a str>, typ: Type<'a> },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lit`
[INFO] [stderr]   --> src/ast.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     Lit(Literal),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/ast.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Var(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lam`
[INFO] [stderr]   --> src/ast.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     Lam(Lambda<'a>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `App`
[INFO] [stderr]   --> src/ast.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     App(Box<Expr<'a>>, Box<Expr<'a>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/ast.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Var(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Concrete`
[INFO] [stderr]   --> src/ast.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     Concrete(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `App`
[INFO] [stderr]   --> src/ast.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     App(Box<Type<'a>>, Box<Type<'a>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lex.rs:45:27
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn requires_separator(&self) -> bool {
[INFO] [stderr]    |                           ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lex.rs:54:19
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn is_literal(&self) -> bool {
[INFO] [stderr]    |                   ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lex.rs:62:29
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn is_pattern_start(&self) -> bool {
[INFO] [stderr]    |                             ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/lex.rs:123:9
[INFO] [stderr]     |
[INFO] [stderr] 123 |         self.iter.peek().map(|x| *x)
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.iter.peek().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/lex.rs:353:30
[INFO] [stderr]     |
[INFO] [stderr] 353 |             text: &self.file[self.start..self.end + 1],
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `self.start..=self.end`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 28
[INFO] [stderr]    --> src/lex.rs:481:5
[INFO] [stderr]     |
[INFO] [stderr] 481 | /     fn next(&mut self) -> Option<Self::Item> {
[INFO] [stderr] 482 | |         while let Some(c) = self.eat() {
[INFO] [stderr] 483 | |             // Check for (line) comments.
[INFO] [stderr] 484 | |             if c == '-' {
[INFO] [stderr] ...   |
[INFO] [stderr] 677 | |         None
[INFO] [stderr] 678 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/parse.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |       if let Some(_) = tokens.eat_if(Module) {
[INFO] [stderr]    |  _____-      ^^^^^^^
[INFO] [stderr] 14 | |         tokens.expect(Ident).map(|tok| module.name = tok.text);
[INFO] [stderr] 15 | |         tokens.expect(Semi);
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____- help: try this: `if tokens.eat_if(Module).is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/parse.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         tokens.expect(Ident).map(|tok| module.name = tok.text);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: try this: `if let Some(tok) = tokens.expect(Ident) { ... }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::option_map_unit_fn)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TypeSignature`
[INFO] [stderr]   --> src/ast.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     TypeSignature { names: Vec<&'a str>, typ: Type<'a> },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lit`
[INFO] [stderr]   --> src/ast.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     Lit(Literal),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/ast.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Var(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lam`
[INFO] [stderr]   --> src/ast.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     Lam(Lambda<'a>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `App`
[INFO] [stderr]   --> src/ast.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     App(Box<Expr<'a>>, Box<Expr<'a>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/ast.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Var(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Concrete`
[INFO] [stderr]   --> src/ast.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     Concrete(&'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `App`
[INFO] [stderr]   --> src/ast.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     App(Box<Type<'a>>, Box<Type<'a>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lex.rs:45:27
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn requires_separator(&self) -> bool {
[INFO] [stderr]    |                           ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lex.rs:54:19
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn is_literal(&self) -> bool {
[INFO] [stderr]    |                   ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lex.rs:62:29
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn is_pattern_start(&self) -> bool {
[INFO] [stderr]    |                             ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/lex.rs:123:9
[INFO] [stderr]     |
[INFO] [stderr] 123 |         self.iter.peek().map(|x| *x)
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.iter.peek().cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/lex.rs:353:30
[INFO] [stderr]     |
[INFO] [stderr] 353 |             text: &self.file[self.start..self.end + 1],
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `self.start..=self.end`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 28
[INFO] [stderr]    --> src/lex.rs:481:5
[INFO] [stderr]     |
[INFO] [stderr] 481 | /     fn next(&mut self) -> Option<Self::Item> {
[INFO] [stderr] 482 | |         while let Some(c) = self.eat() {
[INFO] [stderr] 483 | |             // Check for (line) comments.
[INFO] [stderr] 484 | |             if c == '-' {
[INFO] [stderr] ...   |
[INFO] [stderr] 677 | |         None
[INFO] [stderr] 678 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/parse.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |       if let Some(_) = tokens.eat_if(Module) {
[INFO] [stderr]    |  _____-      ^^^^^^^
[INFO] [stderr] 14 | |         tokens.expect(Ident).map(|tok| module.name = tok.text);
[INFO] [stderr] 15 | |         tokens.expect(Semi);
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____- help: try this: `if tokens.eat_if(Module).is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/parse.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         tokens.expect(Ident).map(|tok| module.name = tok.text);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: try this: `if let Some(tok) = tokens.expect(Ident) { ... }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::option_map_unit_fn)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "16f9f73601dff051e720aa09327c0a063a301874848216ff6cc75ac1c41bff23"`
[INFO] running `"docker" "rm" "-f" "16f9f73601dff051e720aa09327c0a063a301874848216ff6cc75ac1c41bff23"`
[INFO] [stdout] 16f9f73601dff051e720aa09327c0a063a301874848216ff6cc75ac1c41bff23