[INFO] updating cached repository komamitsu/tiny-rust-lisp
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/komamitsu/tiny-rust-lisp
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/komamitsu/tiny-rust-lisp" "work/ex/clippy-test-run/sources/stable/gh/komamitsu/tiny-rust-lisp"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/komamitsu/tiny-rust-lisp'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/komamitsu/tiny-rust-lisp" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/komamitsu/tiny-rust-lisp"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/komamitsu/tiny-rust-lisp'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6da2dc40d3a3f382f2530509cab95995da6f3451
[INFO] sha for GitHub repo komamitsu/tiny-rust-lisp: 6da2dc40d3a3f382f2530509cab95995da6f3451
[INFO] validating manifest of komamitsu/tiny-rust-lisp 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 komamitsu/tiny-rust-lisp 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 komamitsu/tiny-rust-lisp
[INFO] finished frobbing komamitsu/tiny-rust-lisp
[INFO] frobbed toml for komamitsu/tiny-rust-lisp written to work/ex/clippy-test-run/sources/stable/gh/komamitsu/tiny-rust-lisp/Cargo.toml
[INFO] started frobbing komamitsu/tiny-rust-lisp
[INFO] finished frobbing komamitsu/tiny-rust-lisp
[INFO] frobbed toml for komamitsu/tiny-rust-lisp written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/komamitsu/tiny-rust-lisp/Cargo.toml
[INFO] crate komamitsu/tiny-rust-lisp 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 komamitsu/tiny-rust-lisp against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/komamitsu/tiny-rust-lisp:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 78023d45d10ec08978e41d34e23858bb61b870ba3c9a5690c2f74da372f4c97f
[INFO] running `"docker" "start" "-a" "78023d45d10ec08978e41d34e23858bb61b870ba3c9a5690c2f74da372f4c97f"`
[INFO] [stderr]     Checking tiny-rust-lisp v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lexer.rs:12:25
[INFO] [stderr]    |
[INFO] [stderr] 12 |         ExtendedToken { token: token, index: index, len: len }
[INFO] [stderr]    |                         ^^^^^^^^^^^^ help: replace it with: `token`
[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/lexer.rs:12:39
[INFO] [stderr]    |
[INFO] [stderr] 12 |         ExtendedToken { token: token, index: index, len: len }
[INFO] [stderr]    |                                       ^^^^^^^^^^^^ help: replace it with: `index`
[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/lexer.rs:12:53
[INFO] [stderr]    |
[INFO] [stderr] 12 |         ExtendedToken { token: token, index: index, 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/parser.rs:22:18
[INFO] [stderr]    |
[INFO] [stderr] 22 |         Parser { tokens: tokens }
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^ help: replace it with: `tokens`
[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/lexer.rs:12:25
[INFO] [stderr]    |
[INFO] [stderr] 12 |         ExtendedToken { token: token, index: index, len: len }
[INFO] [stderr]    |                         ^^^^^^^^^^^^ help: replace it with: `token`
[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/lexer.rs:12:39
[INFO] [stderr]    |
[INFO] [stderr] 12 |         ExtendedToken { token: token, index: index, len: len }
[INFO] [stderr]    |                                       ^^^^^^^^^^^^ help: replace it with: `index`
[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/lexer.rs:12:53
[INFO] [stderr]    |
[INFO] [stderr] 12 |         ExtendedToken { token: token, index: index, 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/parser.rs:22:18
[INFO] [stderr]    |
[INFO] [stderr] 22 |         Parser { tokens: tokens }
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^ help: replace it with: `tokens`
[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/eval.rs:214:22
[INFO] [stderr]     |
[INFO] [stderr] 214 |                   else {
[INFO] [stderr]     |  ______________________^
[INFO] [stderr] 215 | |                     if let Node::Keyword(ref k) = *arg.clone() {
[INFO] [stderr] 216 | |                         key = Some(k.clone())
[INFO] [stderr] 217 | |                     }
[INFO] [stderr] ...   |
[INFO] [stderr] 221 | |                     }
[INFO] [stderr] 222 | |                 }
[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] 214 |                 else if let Node::Keyword(ref k) = *arg.clone() {
[INFO] [stderr] 215 |     key = Some(k.clone())
[INFO] [stderr] 216 | }
[INFO] [stderr] 217 | else {
[INFO] [stderr] 218 |     return Err(EvalError(format!(
[INFO] [stderr] 219 |                 "`setq` accepts only Node::Keyword as a key, but got {:?}", arg)));
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/eval.rs:214:22
[INFO] [stderr]     |
[INFO] [stderr] 214 |                   else {
[INFO] [stderr]     |  ______________________^
[INFO] [stderr] 215 | |                     if let Node::Keyword(ref k) = *arg.clone() {
[INFO] [stderr] 216 | |                         key = Some(k.clone())
[INFO] [stderr] 217 | |                     }
[INFO] [stderr] ...   |
[INFO] [stderr] 221 | |                     }
[INFO] [stderr] 222 | |                 }
[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] 214 |                 else if let Node::Keyword(ref k) = *arg.clone() {
[INFO] [stderr] 215 |     key = Some(k.clone())
[INFO] [stderr] 216 | }
[INFO] [stderr] 217 | else {
[INFO] [stderr] 218 |     return Err(EvalError(format!(
[INFO] [stderr] 219 |                 "`setq` accepts only Node::Keyword as a key, but got {:?}", arg)));
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                     node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                     ^^^^ help: consider using `_node` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]    --> src/eval.rs:166:12
[INFO] [stderr]     |
[INFO] [stderr] 166 |            env: &mut Env,
[INFO] [stderr]     |            ^^^ help: consider using `_env` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:168:12
[INFO] [stderr]     |
[INFO] [stderr] 168 |            node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |            ^^^^ help: consider using `_node` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]    --> src/eval.rs:183:12
[INFO] [stderr]     |
[INFO] [stderr] 183 |            env: &mut Env,
[INFO] [stderr]     |            ^^^ help: consider using `_env` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:185:12
[INFO] [stderr]     |
[INFO] [stderr] 185 |            node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |            ^^^^ help: consider using `_node` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]    --> src/eval.rs:231:22
[INFO] [stderr]     |
[INFO] [stderr] 231 |     fn lambda(&self, env: &mut Env, args: &[Rc<Node>], node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                      ^^^ help: consider using `_env` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:231:56
[INFO] [stderr]     |
[INFO] [stderr] 231 |     fn lambda(&self, env: &mut Env, args: &[Rc<Node>], node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                                                        ^^^^ help: consider using `_node` instead
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `eval::Env`
[INFO] [stderr]   --> src/eval.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     pub fn new() -> Self {
[INFO] [stderr] 17 | |         Env {
[INFO] [stderr] 18 | |             envs: vec![HashMap::new()]
[INFO] [stderr] 19 | |         }
[INFO] [stderr] 20 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 11 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/eval.rs:28:28
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn get(&self, key: &String) -> Option<Rc<Node>> {
[INFO] [stderr]    |                            ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/eval.rs:48:33
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn remove(&mut self, k: &String) -> Option<Rc<Node>> {
[INFO] [stderr]    |                                 ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `eval::Eval`
[INFO] [stderr]   --> src/eval.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 | /     pub fn new() -> Self {
[INFO] [stderr] 69 | |         Eval {}
[INFO] [stderr] 70 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 8  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/eval.rs:101:35
[INFO] [stderr]     |
[INFO] [stderr] 101 |             None => Err(EvalError(format!("Empty argument")))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty argument".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] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/eval.rs:136:35
[INFO] [stderr]     |
[INFO] [stderr] 136 |             None => Err(EvalError(format!("Empty argument")))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty argument".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] error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
[INFO] [stderr]    --> src/eval.rs:191:69
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         Some((_, tl)) => Rc::new(Node::QuotedList((*tl.clone()).to_vec())),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::clone_double_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_double_ref
[INFO] [stderr] help: try dereferencing it
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         Some((_, tl)) => Rc::new(Node::QuotedList((*&(*tl).clone()).to_vec())),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^
[INFO] [stderr] help: or try being explicit about what type to clone
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         Some((_, tl)) => Rc::new(Node::QuotedList((*&[std::rc::Rc<parser::Node>]::clone(tl)).to_vec())),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/eval.rs:233:13
[INFO] [stderr]     |
[INFO] [stderr] 233 | /             match (&*args[0].clone(), &*args[1].clone()) {
[INFO] [stderr] 234 | |                 (&Node::List(ref xs), &Node::List(ref body)) => {
[INFO] [stderr] 235 | |                     let mut fargs = Vec::new();
[INFO] [stderr] 236 | |                     let mut errors = Vec::new();
[INFO] [stderr] ...   |
[INFO] [stderr] 255 | |                 _ => ()
[INFO] [stderr] 256 | |             }
[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] 233 |             if let (&Node::List(ref xs), &Node::List(ref body)) = (&*args[0].clone(), &*args[1].clone()) {
[INFO] [stderr] 234 |     let mut fargs = Vec::new();
[INFO] [stderr] 235 |     let mut errors = Vec::new();
[INFO] [stderr] 236 | 
[INFO] [stderr] 237 |     for x in xs {
[INFO] [stderr] 238 |         match *x.clone() {
[INFO] [stderr]   ...
[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/eval.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 | /         match *node.clone() {
[INFO] [stderr] 265 | |             Node::Func(ref xs, ref body) => {
[INFO] [stderr] 266 | |                 if xs.len() != args.len() {
[INFO] [stderr] 267 | |                     panic!("The numbers of argments don't match: expected({:?}), got({:?})", xs, args);
[INFO] [stderr] ...   |
[INFO] [stderr] 283 | |             _ => ()
[INFO] [stderr] 284 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[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] 264 |         if let Node::Func(ref xs, ref body) = *node.clone() {
[INFO] [stderr] 265 |     if xs.len() != args.len() {
[INFO] [stderr] 266 |         panic!("The numbers of argments don't match: expected({:?}), got({:?})", xs, args);
[INFO] [stderr] 267 |     }
[INFO] [stderr] 268 | 
[INFO] [stderr] 269 |     env.push_env();
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/eval.rs:292:9
[INFO] [stderr]     |
[INFO] [stderr] 292 | /         match &*node.clone() {
[INFO] [stderr] 293 | |             &Node::Integer(_) => Ok(node),
[INFO] [stderr] 294 | |             &Node::Keyword(ref kwd) => {
[INFO] [stderr] 295 | |                 let nd = match env.get(&kwd) {
[INFO] [stderr] ...   |
[INFO] [stderr] 304 | |             _ => Ok(node),
[INFO] [stderr] 305 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 292 |         match *node.clone() {
[INFO] [stderr] 293 |             Node::Integer(_) => Ok(node),
[INFO] [stderr] 294 |             Node::Keyword(ref kwd) => {
[INFO] [stderr] 295 |                 let nd = match env.get(&kwd) {
[INFO] [stderr] 296 |                     Some(x) => x,
[INFO] [stderr] 297 |                     None => return Ok(Rc::new(Node::Keyword(kwd.clone()))),
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/eval.rs:308:61
[INFO] [stderr]     |
[INFO] [stderr] 308 |     fn eval_func(&self, env: &mut Env, node: &Rc<Node>, xs: &Vec<Rc<Node>>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^ help: change this to: `&[Rc<Node>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/eval.rs:310:9
[INFO] [stderr]     |
[INFO] [stderr] 310 | /         if let &Node::Keyword(ref kwd) = &*hd.clone() {
[INFO] [stderr] 311 | |             match kwd.as_str() {
[INFO] [stderr] 312 | |                 "+" => self.calc_integer(env, &|a, i| a + i, tl, node),
[INFO] [stderr] 313 | |                 "-" => self.calc_integer(env, &|a, i| a - i, tl, node),
[INFO] [stderr] ...   |
[INFO] [stderr] 337 | |             Err(EvalError(format!("Unexpected node: {:?}", node)))
[INFO] [stderr] 338 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 310 |         if let Node::Keyword(ref kwd) = *hd.clone() {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `Lisp`
[INFO] [stderr]   --> src/lib.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     pub fn new() -> Self {
[INFO] [stderr] 36 | |         Lisp {
[INFO] [stderr] 37 | |             eval: Eval::new(),
[INFO] [stderr] 38 | |             env: Env::new(),
[INFO] [stderr] 39 | |         }
[INFO] [stderr] 40 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 34 | impl Default for Lisp {
[INFO] [stderr] 35 |     fn default() -> Self {
[INFO] [stderr] 36 |         Self::new()
[INFO] [stderr] 37 |     }
[INFO] [stderr] 38 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `tiny-rust-lisp`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                     node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                     ^^^^ help: consider using `_node` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]    --> src/eval.rs:166:12
[INFO] [stderr]     |
[INFO] [stderr] 166 |            env: &mut Env,
[INFO] [stderr]     |            ^^^ help: consider using `_env` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:168:12
[INFO] [stderr]     |
[INFO] [stderr] 168 |            node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |            ^^^^ help: consider using `_node` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]    --> src/eval.rs:183:12
[INFO] [stderr]     |
[INFO] [stderr] 183 |            env: &mut Env,
[INFO] [stderr]     |            ^^^ help: consider using `_env` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:185:12
[INFO] [stderr]     |
[INFO] [stderr] 185 |            node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |            ^^^^ help: consider using `_node` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]    --> src/eval.rs:231:22
[INFO] [stderr]     |
[INFO] [stderr] 231 |     fn lambda(&self, env: &mut Env, args: &[Rc<Node>], node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                      ^^^ help: consider using `_env` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/eval.rs:231:56
[INFO] [stderr]     |
[INFO] [stderr] 231 |     fn lambda(&self, env: &mut Env, args: &[Rc<Node>], node: &Rc<Node>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                                                        ^^^^ help: consider using `_node` instead
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `eval::Env`
[INFO] [stderr]   --> src/eval.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     pub fn new() -> Self {
[INFO] [stderr] 17 | |         Env {
[INFO] [stderr] 18 | |             envs: vec![HashMap::new()]
[INFO] [stderr] 19 | |         }
[INFO] [stderr] 20 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 11 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/eval.rs:28:28
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn get(&self, key: &String) -> Option<Rc<Node>> {
[INFO] [stderr]    |                            ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/eval.rs:48:33
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn remove(&mut self, k: &String) -> Option<Rc<Node>> {
[INFO] [stderr]    |                                 ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `eval::Eval`
[INFO] [stderr]   --> src/eval.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 | /     pub fn new() -> Self {
[INFO] [stderr] 69 | |         Eval {}
[INFO] [stderr] 70 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 8  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/eval.rs:101:35
[INFO] [stderr]     |
[INFO] [stderr] 101 |             None => Err(EvalError(format!("Empty argument")))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty argument".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] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/eval.rs:136:35
[INFO] [stderr]     |
[INFO] [stderr] 136 |             None => Err(EvalError(format!("Empty argument")))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty argument".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] error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
[INFO] [stderr]    --> src/eval.rs:191:69
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         Some((_, tl)) => Rc::new(Node::QuotedList((*tl.clone()).to_vec())),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::clone_double_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_double_ref
[INFO] [stderr] help: try dereferencing it
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         Some((_, tl)) => Rc::new(Node::QuotedList((*&(*tl).clone()).to_vec())),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^
[INFO] [stderr] help: or try being explicit about what type to clone
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         Some((_, tl)) => Rc::new(Node::QuotedList((*&[std::rc::Rc<parser::Node>]::clone(tl)).to_vec())),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/eval.rs:233:13
[INFO] [stderr]     |
[INFO] [stderr] 233 | /             match (&*args[0].clone(), &*args[1].clone()) {
[INFO] [stderr] 234 | |                 (&Node::List(ref xs), &Node::List(ref body)) => {
[INFO] [stderr] 235 | |                     let mut fargs = Vec::new();
[INFO] [stderr] 236 | |                     let mut errors = Vec::new();
[INFO] [stderr] ...   |
[INFO] [stderr] 255 | |                 _ => ()
[INFO] [stderr] 256 | |             }
[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] 233 |             if let (&Node::List(ref xs), &Node::List(ref body)) = (&*args[0].clone(), &*args[1].clone()) {
[INFO] [stderr] 234 |     let mut fargs = Vec::new();
[INFO] [stderr] 235 |     let mut errors = Vec::new();
[INFO] [stderr] 236 | 
[INFO] [stderr] 237 |     for x in xs {
[INFO] [stderr] 238 |         match *x.clone() {
[INFO] [stderr]   ...
[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/eval.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 | /         match *node.clone() {
[INFO] [stderr] 265 | |             Node::Func(ref xs, ref body) => {
[INFO] [stderr] 266 | |                 if xs.len() != args.len() {
[INFO] [stderr] 267 | |                     panic!("The numbers of argments don't match: expected({:?}), got({:?})", xs, args);
[INFO] [stderr] ...   |
[INFO] [stderr] 283 | |             _ => ()
[INFO] [stderr] 284 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[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] 264 |         if let Node::Func(ref xs, ref body) = *node.clone() {
[INFO] [stderr] 265 |     if xs.len() != args.len() {
[INFO] [stderr] 266 |         panic!("The numbers of argments don't match: expected({:?}), got({:?})", xs, args);
[INFO] [stderr] 267 |     }
[INFO] [stderr] 268 | 
[INFO] [stderr] 269 |     env.push_env();
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/eval.rs:292:9
[INFO] [stderr]     |
[INFO] [stderr] 292 | /         match &*node.clone() {
[INFO] [stderr] 293 | |             &Node::Integer(_) => Ok(node),
[INFO] [stderr] 294 | |             &Node::Keyword(ref kwd) => {
[INFO] [stderr] 295 | |                 let nd = match env.get(&kwd) {
[INFO] [stderr] ...   |
[INFO] [stderr] 304 | |             _ => Ok(node),
[INFO] [stderr] 305 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 292 |         match *node.clone() {
[INFO] [stderr] 293 |             Node::Integer(_) => Ok(node),
[INFO] [stderr] 294 |             Node::Keyword(ref kwd) => {
[INFO] [stderr] 295 |                 let nd = match env.get(&kwd) {
[INFO] [stderr] 296 |                     Some(x) => x,
[INFO] [stderr] 297 |                     None => return Ok(Rc::new(Node::Keyword(kwd.clone()))),
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/eval.rs:308:61
[INFO] [stderr]     |
[INFO] [stderr] 308 |     fn eval_func(&self, env: &mut Env, node: &Rc<Node>, xs: &Vec<Rc<Node>>) -> Result<Rc<Node>, EvalError> {
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^ help: change this to: `&[Rc<Node>]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/eval.rs:310:9
[INFO] [stderr]     |
[INFO] [stderr] 310 | /         if let &Node::Keyword(ref kwd) = &*hd.clone() {
[INFO] [stderr] 311 | |             match kwd.as_str() {
[INFO] [stderr] 312 | |                 "+" => self.calc_integer(env, &|a, i| a + i, tl, node),
[INFO] [stderr] 313 | |                 "-" => self.calc_integer(env, &|a, i| a - i, tl, node),
[INFO] [stderr] ...   |
[INFO] [stderr] 337 | |             Err(EvalError(format!("Unexpected node: {:?}", node)))
[INFO] [stderr] 338 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 310 |         if let Node::Keyword(ref kwd) = *hd.clone() {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/eval.rs:442:9
[INFO] [stderr]     |
[INFO] [stderr] 442 | /         Eval::new().eval(
[INFO] [stderr] 443 | |             env1,
[INFO] [stderr] 444 | |             Rc::new(Node::List(
[INFO] [stderr] 445 | |                 vec![
[INFO] [stderr] ...   |
[INFO] [stderr] 467 | |             ))
[INFO] [stderr] 468 | |         );
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `Lisp`
[INFO] [stderr]   --> src/lib.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     pub fn new() -> Self {
[INFO] [stderr] 36 | |         Lisp {
[INFO] [stderr] 37 | |             eval: Eval::new(),
[INFO] [stderr] 38 | |             env: Env::new(),
[INFO] [stderr] 39 | |         }
[INFO] [stderr] 40 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 34 | impl Default for Lisp {
[INFO] [stderr] 35 |     fn default() -> Self {
[INFO] [stderr] 36 |         Self::new()
[INFO] [stderr] 37 |     }
[INFO] [stderr] 38 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `tiny-rust-lisp`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "78023d45d10ec08978e41d34e23858bb61b870ba3c9a5690c2f74da372f4c97f"`
[INFO] running `"docker" "rm" "-f" "78023d45d10ec08978e41d34e23858bb61b870ba3c9a5690c2f74da372f4c97f"`
[INFO] [stdout] 78023d45d10ec08978e41d34e23858bb61b870ba3c9a5690c2f74da372f4c97f