[INFO] updating cached repository meddle0x53/mscheme
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/meddle0x53/mscheme
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/meddle0x53/mscheme" "work/ex/clippy-test-run/sources/stable/gh/meddle0x53/mscheme"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/meddle0x53/mscheme'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/meddle0x53/mscheme" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/meddle0x53/mscheme"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/meddle0x53/mscheme'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 84dafecf41861185cba65f3cfea7c347f31241dd
[INFO] sha for GitHub repo meddle0x53/mscheme: 84dafecf41861185cba65f3cfea7c347f31241dd
[INFO] validating manifest of meddle0x53/mscheme 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 meddle0x53/mscheme 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 meddle0x53/mscheme
[INFO] finished frobbing meddle0x53/mscheme
[INFO] frobbed toml for meddle0x53/mscheme written to work/ex/clippy-test-run/sources/stable/gh/meddle0x53/mscheme/Cargo.toml
[INFO] started frobbing meddle0x53/mscheme
[INFO] finished frobbing meddle0x53/mscheme
[INFO] frobbed toml for meddle0x53/mscheme written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/meddle0x53/mscheme/Cargo.toml
[INFO] crate meddle0x53/mscheme 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] [stderr]     Blocking waiting for file lock on the registry index
[INFO] linting meddle0x53/mscheme 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/meddle0x53/mscheme:/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] 3ca9ce2091afdf5158def8c8e76096c7335a8d05bd5aadad76ceed5d6813f5c2
[INFO] running `"docker" "start" "-a" "3ca9ce2091afdf5158def8c8e76096c7335a8d05bd5aadad76ceed5d6813f5c2"`
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking rustyline v1.0.0
[INFO] [stderr]     Checking mscheme v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer/iterator.rs:84:21
[INFO] [stderr]    |
[INFO] [stderr] 84 |             None => return Err(SyntaxError::UnexpectedEOL),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err(SyntaxError::UnexpectedEOL)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:16:23
[INFO] [stderr]    |
[INFO] [stderr] 16 |     repl::start("> ", (|s, runtime| interpreter::run(&s, runtime)))
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer/iterator.rs:84:21
[INFO] [stderr]    |
[INFO] [stderr] 84 |             None => return Err(SyntaxError::UnexpectedEOL),
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err(SyntaxError::UnexpectedEOL)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lexer/mod.rs:150:45
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 OpenParen, id("-"), Integer(778899), OpenParen, id("+"),
[INFO] [stderr]     |                                             ^^^^^^ help: consider: `778_899`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:16:23
[INFO] [stderr]    |
[INFO] [stderr] 16 |     repl::start("> ", (|s, runtime| interpreter::run(&s, runtime)))
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/errors.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | /         match self {
[INFO] [stderr] 14 | |             &SyntaxError::InvalidSymbol(line, column, ref message) => {
[INFO] [stderr] 15 | |                 write!(
[INFO] [stderr] 16 | |                     f,
[INFO] [stderr] ...  |
[INFO] [stderr] 26 | |             }
[INFO] [stderr] 27 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 13 |         match *self {
[INFO] [stderr] 14 |             SyntaxError::InvalidSymbol(line, column, ref message) => {
[INFO] [stderr] 15 |                 write!(
[INFO] [stderr] 16 |                     f,
[INFO] [stderr] 17 |                     "SyntaxError: {} (line: {}, column: {})",
[INFO] [stderr] 18 |                     message, line, column + 1
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/errors.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 | /         match self {
[INFO] [stderr] 55 | |             &ParseError::ClosingParenWithoutOpening => {
[INFO] [stderr] 56 | |                 write!(
[INFO] [stderr] 57 | |                     f, "ParseError: Closing parens don't match the opening ones"
[INFO] [stderr] ...  |
[INFO] [stderr] 62 | |             }
[INFO] [stderr] 63 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 54 |         match *self {
[INFO] [stderr] 55 |             ParseError::ClosingParenWithoutOpening => {
[INFO] [stderr] 56 |                 write!(
[INFO] [stderr] 57 |                     f, "ParseError: Closing parens don't match the opening ones"
[INFO] [stderr] 58 |                 )
[INFO] [stderr] 59 |             },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: Negation by multiplying with -1
[INFO] [stderr]   --> src/lexer/iterator.rs:69:37
[INFO] [stderr]    |
[INFO] [stderr] 69 |         Ok(Integer(if sign == '-' { -1 * value } else { value }))
[INFO] [stderr]    |                                     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::neg_multiply)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#neg_multiply
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/lexer/iterator.rs:111:36
[INFO] [stderr]     |
[INFO] [stderr] 111 |         while let Some((_, chr)) = self.next() {
[INFO] [stderr]     |                                    ^^^^^^^^^^^ help: try: `for (_, chr) in self { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_on_iterator)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[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/parser/mod.rs:17:22
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn parse(tokens: &Vec<Token>) -> Result<Vec<ASTNode>, ParseError> {
[INFO] [stderr]    |                      ^^^^^^^^^^^ help: change this to: `&[Token]`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser/mod.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 | /         match token {
[INFO] [stderr] 26 | |             &Token::OpenParen => {
[INFO] [stderr] 27 | |                 let inner = try!(parse_level(tokens, level + 1));
[INFO] [stderr] 28 | |                 ast_nodes.push(List(inner));
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |             },
[INFO] [stderr] 49 | |         };
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 25 |         match *token {
[INFO] [stderr] 26 |             Token::OpenParen => {
[INFO] [stderr] 27 |                 let inner = try!(parse_level(tokens, level + 1));
[INFO] [stderr] 28 |                 ast_nodes.push(List(inner));
[INFO] [stderr] 29 |             },
[INFO] [stderr] 30 |             Token::CloseParen => {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/parser/mod.rs:41:40
[INFO] [stderr]    |
[INFO] [stderr] 41 |                 ast_nodes.push(Integer(val.clone()));
[INFO] [stderr]    |                                        ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/parser/mod.rs:44:40
[INFO] [stderr]    |
[INFO] [stderr] 44 |                 ast_nodes.push(Boolean(val.clone()));
[INFO] [stderr]    |                                        ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/interpreter/value.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         match self {
[INFO] [stderr] 34 | |             &Symbol(_) => format!("'{}", self.display()),
[INFO] [stderr] 35 | |             &List(_) => format!("'{}", self.display()),
[INFO] [stderr] 36 | |             _ => self.display()
[INFO] [stderr] 37 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 33 |         match *self {
[INFO] [stderr] 34 |             Symbol(_) => format!("'{}", self.display()),
[INFO] [stderr] 35 |             List(_) => format!("'{}", self.display()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/interpreter/value.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 | /         match self {
[INFO] [stderr] 42 | |             &Symbol(ref val) => format!("{}", val),
[INFO] [stderr] 43 | |             &Integer(val) => format!("{}", val),
[INFO] [stderr] 44 | |             &Boolean(val) => format!("#{}", if val { "t" } else { "f" }),
[INFO] [stderr] ...  |
[INFO] [stderr] 59 | |             &Func(_, _) => format!("#<procedure>")
[INFO] [stderr] 60 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 41 |         match *self {
[INFO] [stderr] 42 |             Symbol(ref val) => format!("{}", val),
[INFO] [stderr] 43 |             Integer(val) => format!("{}", val),
[INFO] [stderr] 44 |             Boolean(val) => format!("#{}", if val { "t" } else { "f" }),
[INFO] [stderr] 45 |             StringValue(ref val) => format!("\"{}\"", val),
[INFO] [stderr] 46 |             List(ref val) => {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/interpreter/value.rs:42:33
[INFO] [stderr]    |
[INFO] [stderr] 42 |             &Symbol(ref val) => format!("{}", val),
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `val.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/interpreter/value.rs:59:28
[INFO] [stderr]    |
[INFO] [stderr] 59 |             &Func(_, _) => format!("#<procedure>")
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"#<procedure>".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/interpreter/runtime.rs:30:39
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn is_var_defined(&self, key: &String) -> bool {
[INFO] [stderr]    |                                       ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/interpreter/runtime.rs:34:38
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn get_var_value(&self, key: &String) -> Option<Value> {
[INFO] [stderr]    |                                      ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/interpreter/mod.rs:26:24
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub fn eval(ast_nodes: &Vec<ASTNode>, runtime: &RuntimeNode) -> Result<Value, RuntimeError> {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ help: change this to: `&[ASTNode]`
[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 all patterns
[INFO] [stderr]   --> src/interpreter/mod.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | /     match node {
[INFO] [stderr] 38 | |         &ASTNode::Identifier(ref v) => {
[INFO] [stderr] 39 | |             if let Some(val) = runtime.borrow().get_var_value(v) {
[INFO] [stderr] 40 | |                 Ok(val)
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |         }
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 37 |     match *node {
[INFO] [stderr] 38 |         ASTNode::Identifier(ref v) => {
[INFO] [stderr] 39 |             if let Some(val) = runtime.borrow().get_var_value(v) {
[INFO] [stderr] 40 |                 Ok(val)
[INFO] [stderr] 41 |             } else {
[INFO] [stderr] 42 |                 runtime_error!("Identifier not found! {:?}", node)
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/interpreter/mod.rs:49:16
[INFO] [stderr]    |
[INFO] [stderr] 49 |             if vec.len() > 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vec.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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/interpreter/mod.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn eval_list(nodes: &Vec<ASTNode>, env: RuntimeNode) -> Result<Value, RuntimeError> {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^ help: change this to: `&[ASTNode]`
[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: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/interpreter/mod.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let first = nodes.get(0).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^ help: try this: `&nodes[0]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/interpreter/mod.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | /     match first {
[INFO] [stderr] 62 | |         &ASTNode::Identifier(ref func) => {
[INFO] [stderr] 63 | |             match func.as_str() {
[INFO] [stderr] 64 | |                 "define" => define(nodes, env),
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |         }
[INFO] [stderr] 91 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 61 |     match *first {
[INFO] [stderr] 62 |         ASTNode::Identifier(ref func) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/interpreter/mod.rs:95:5
[INFO] [stderr]     |
[INFO] [stderr] 95  | /     match ast_node {
[INFO] [stderr] 96  | |         &ASTNode::Identifier(ref v) => Ok(Symbol(v.clone())),
[INFO] [stderr] 97  | |         &ASTNode::Integer(v) => Ok(Integer(v)),
[INFO] [stderr] 98  | |         &ASTNode::Boolean(v) => Ok(Boolean(v)),
[INFO] [stderr] ...   |
[INFO] [stderr] 104 | |         }
[INFO] [stderr] 105 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 95  |     match *ast_node {
[INFO] [stderr] 96  |         ASTNode::Identifier(ref v) => Ok(Symbol(v.clone())),
[INFO] [stderr] 97  |         ASTNode::Integer(v) => Ok(Integer(v)),
[INFO] [stderr] 98  |         ASTNode::Boolean(v) => Ok(Boolean(v)),
[INFO] [stderr] 99  |         ASTNode::StringNode(ref v) => Ok(StringValue(v.clone())),
[INFO] [stderr] 100 |         ASTNode::List(ref values) => {
[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/interpreter/mod.rs:108:22
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn define(ast_nodes: &Vec<ASTNode>, runtime: RuntimeNode) -> Result<Value, RuntimeError> {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^ help: change this to: `&[ASTNode]`
[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 all patterns
[INFO] [stderr]    --> src/interpreter/mod.rs:111:16
[INFO] [stderr]     |
[INFO] [stderr] 111 |       let name = match node_at!(ast_nodes, 1) {
[INFO] [stderr]     |  ________________^
[INFO] [stderr] 112 | |         &ASTNode::Identifier(ref x) => x,
[INFO] [stderr] 113 | |         _ => runtime_error!("Bad variable name in 'define': {:?}", ast_nodes)
[INFO] [stderr] 114 | |     };
[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] thread 'main' panicked at 'byte index 38 is out of bounds of `    let mut result = empty!();`', src/libcore/str/mod.rs:2092:9
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x7fa7cbdf4c53 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h00d1e05a61bd440b
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
[INFO] [stderr]    1:     0x7fa7cbdec368 - std::sys_common::backtrace::_print::hc0d53aca8da62f75
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x7fa7cbdf16c2 - std::panicking::default_hook::{{closure}}::h46d30bcc4bfff149
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    3:     0x7fa7cbdf142d - std::panicking::default_hook::h017696c2a8b7b16f
[INFO] [stderr]                                at src/libstd/panicking.rs:227
[INFO] [stderr]    4:     0x7fa7cdd78813 - rustc::util::common::panic_hook::h0c2559a338a9af32
[INFO] [stderr]    5:     0x7fa7cbdf1ea9 - std::panicking::rust_panic_with_hook::h8cbdfe43764887be
[INFO] [stderr]                                at src/libstd/panicking.rs:495
[INFO] [stderr]    6:     0x7fa7cbdf1951 - std::panicking::continue_panic_fmt::h3d3c5a833c00a5e1
[INFO] [stderr]                                at src/libstd/panicking.rs:398
[INFO] [stderr]    7:     0x7fa7cbdf1835 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:325
[INFO] [stderr]    8:     0x7fa7cbe190bc - core::panicking::panic_fmt::h4d67173bc68f6d5a
[INFO] [stderr]                                at src/libcore/panicking.rs:95
[INFO] [stderr]    9:     0x7fa7cbe1b61d - core::str::slice_error_fail::h2f8a3b25099b18dc
[INFO] [stderr]                                at src/libcore/str/mod.rs:0
[INFO] [stderr]   10:     0x7fa7ccc27238 - core::str::traits::<impl core::slice::SliceIndex<str> for core::ops::range::RangeTo<usize>>::index::{{closure}}::h4971ebf7c303fb06
[INFO] [stderr]   11:     0x7fa7ccc29ced - <core::iter::Map<I, F> as core::iter::iterator::Iterator>::fold::h7c7c970f8732e403
[INFO] [stderr]   12:     0x7fa7ccc13b25 - <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter::hcf81033af4d7a756
[INFO] [stderr]   13:     0x7fa7ccbfd49f - <rustc_errors::emitter::EmitterWriter as rustc_errors::emitter::Emitter>::emit::h50e1d2cf7b978a5a
[INFO] [stderr]   14:     0x7fa7ccc221b3 - rustc_errors::Handler::emit_db::h60fb65338a7b5561
[INFO] [stderr]   15:     0x7fa7ccc0ee27 - rustc_errors::diagnostic_builder::DiagnosticBuilder::emit::h99e2c4975c3f8028
[INFO] [stderr]   16:     0x563c2b185e08 - clippy_lints::utils::span_lint_and_then::h795763088feffed0
[INFO] [stderr]   17:     0x563c2b138236 - <clippy_lints::matches::MatchPass as rustc::lint::LateLintPass<'a, 'tcx>>::check_expr::h5bb1e9cafccfa4fb
[INFO] [stderr]   18:     0x7fa7cdd474c0 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr::h8a29c722cdf7cb16
[INFO] [stderr]   19:     0x7fa7cdd49361 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_local::hd79792d840fd268c
[INFO] [stderr]   20:     0x7fa7cdd495ec - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_block::h6655506fe3948600
[INFO] [stderr]   21:     0x7fa7cdd4758a - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr::h8a29c722cdf7cb16
[INFO] [stderr]   22:     0x7fa7cdd4663f - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_body::h21cf9292ae8432c6
[INFO] [stderr]   23:     0x7fa7cdd4647c - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_nested_body::he8fb9a062ac4b1c8
[INFO] [stderr]   24:     0x7fa7cdd47cce - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_fn::h4aaa2b7e199bfb22
[INFO] [stderr]   25:     0x7fa7cdca82c6 - rustc::hir::intravisit::walk_item::hada2286ef6037169
[INFO] [stderr]   26:     0x7fa7cdd46b0b - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item::h4954886470941d9b
[INFO] [stderr]   27:     0x7fa7cdd48fa0 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod::h10e5a891f2fbd5fe
[INFO] [stderr]   28:     0x7fa7cdca80e8 - rustc::hir::intravisit::walk_item::hada2286ef6037169
[INFO] [stderr]   29:     0x7fa7cdd46b0b - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item::h4954886470941d9b
[INFO] [stderr]   30:     0x7fa7cdd48fa0 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod::h10e5a891f2fbd5fe
[INFO] [stderr]   31:     0x7fa7cdc99c3e - rustc::hir::intravisit::walk_crate::h4afac11c57fcab86
[INFO] [stderr]   32:     0x7fa7cdd5029b - rustc::lint::context::check_crate::hccbef8b90ef472b3
[INFO] [stderr]   33:     0x7fa7ce97bf25 - rustc::util::common::time::hf306edffe5bc1331
[INFO] [stderr]   34:     0x7fa7ce9f5c7e - rustc::ty::context::tls::enter_context::he8336509407aafca
[INFO] [stderr]   35:     0x7fa7ce9c4b81 - <std::thread::local::LocalKey<T>>::with::h104ad8c2b4754810
[INFO] [stderr]   36:     0x7fa7ce9f8ea5 - rustc::ty::context::TyCtxt::create_and_enter::h74cefb108a2f7b6f
[INFO] [stderr]   37:     0x7fa7ce94c915 - rustc_driver::driver::compile_input::hca3f044299fe7ad7
[INFO] [stderr]   38:     0x7fa7cea18352 - rustc_driver::run_compiler_with_pool::hafad319513331ac6
[INFO] [stderr]   39:     0x7fa7ce955415 - <scoped_tls::ScopedKey<T>>::set::h8ef00e2a892c3c56
[INFO] [stderr]   40:     0x7fa7cea1737a - rustc_driver::run_compiler::h7e74f116e6e5e483
[INFO] [stderr]   41:     0x563c2afeecd7 - <scoped_tls::ScopedKey<T>>::set::h8ec3c2b8cbec5474
[INFO] [stderr]   42:     0x563c2afdd5d2 - syntax::with_globals::h5a01e3b26631ef2a
[INFO] [stderr]   43:     0x7fa7cbe0e319 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:102
[INFO] [stderr]   44:     0x563c2afde71b - rustc_driver::run::hccd91432ebf6f6b3
[INFO] [stderr]   45:     0x563c2afec92b - clippy_driver::main::hf97ab97bd1d252bd
[INFO] [stderr]   46:     0x563c2afeb122 - std::rt::lang_start::{{closure}}::h090d6ed12d543f7e
[INFO] [stderr]   47:     0x7fa7cbdf17d2 - std::panicking::try::do_call::h69790245ac2d03fe
[INFO] [stderr]                                at src/libstd/rt.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:310
[INFO] [stderr]   48:     0x7fa7cbe0e319 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:102
[INFO] [stderr]   49:     0x7fa7cbdf2263 - std::rt::lang_start_internal::h540c897fe52ba9c5
[INFO] [stderr]                                at src/libstd/panicking.rs:289
[INFO] [stderr]                                at src/libstd/panic.rs:398
[INFO] [stderr]                                at src/libstd/rt.rs:58
[INFO] [stderr]   50:     0x563c2afec971 - main
[INFO] [stderr]   51:     0x7fa7cb5d82e0 - __libc_start_main
[INFO] [stderr]   52:     0x563c2afd5b88 - <unknown>
[INFO] [stderr] query stack during panic:
[INFO] [stderr] end of query stack
[INFO] [stderr] 
[INFO] [stderr] error: internal compiler error: unexpected panic
[INFO] [stderr] 
[INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug.
[INFO] [stderr] 
[INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.32.0 (9fda7c223 2019-01-16) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: -C debuginfo=2 --crate-type bin
[INFO] [stderr] 
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `mscheme`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/errors.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | /         match self {
[INFO] [stderr] 14 | |             &SyntaxError::InvalidSymbol(line, column, ref message) => {
[INFO] [stderr] 15 | |                 write!(
[INFO] [stderr] 16 | |                     f,
[INFO] [stderr] ...  |
[INFO] [stderr] 26 | |             }
[INFO] [stderr] 27 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 13 |         match *self {
[INFO] [stderr] 14 |             SyntaxError::InvalidSymbol(line, column, ref message) => {
[INFO] [stderr] 15 |                 write!(
[INFO] [stderr] 16 |                     f,
[INFO] [stderr] 17 |                     "SyntaxError: {} (line: {}, column: {})",
[INFO] [stderr] 18 |                     message, line, column + 1
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/errors.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 | /         match self {
[INFO] [stderr] 55 | |             &ParseError::ClosingParenWithoutOpening => {
[INFO] [stderr] 56 | |                 write!(
[INFO] [stderr] 57 | |                     f, "ParseError: Closing parens don't match the opening ones"
[INFO] [stderr] ...  |
[INFO] [stderr] 62 | |             }
[INFO] [stderr] 63 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 54 |         match *self {
[INFO] [stderr] 55 |             ParseError::ClosingParenWithoutOpening => {
[INFO] [stderr] 56 |                 write!(
[INFO] [stderr] 57 |                     f, "ParseError: Closing parens don't match the opening ones"
[INFO] [stderr] 58 |                 )
[INFO] [stderr] 59 |             },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: Negation by multiplying with -1
[INFO] [stderr]   --> src/lexer/iterator.rs:69:37
[INFO] [stderr]    |
[INFO] [stderr] 69 |         Ok(Integer(if sign == '-' { -1 * value } else { value }))
[INFO] [stderr]    |                                     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::neg_multiply)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#neg_multiply
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/lexer/iterator.rs:111:36
[INFO] [stderr]     |
[INFO] [stderr] 111 |         while let Some((_, chr)) = self.next() {
[INFO] [stderr]     |                                    ^^^^^^^^^^^ help: try: `for (_, chr) in self { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_on_iterator)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[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/parser/mod.rs:17:22
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn parse(tokens: &Vec<Token>) -> Result<Vec<ASTNode>, ParseError> {
[INFO] [stderr]    |                      ^^^^^^^^^^^ help: change this to: `&[Token]`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/parser/mod.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 | /         match token {
[INFO] [stderr] 26 | |             &Token::OpenParen => {
[INFO] [stderr] 27 | |                 let inner = try!(parse_level(tokens, level + 1));
[INFO] [stderr] 28 | |                 ast_nodes.push(List(inner));
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |             },
[INFO] [stderr] 49 | |         };
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 25 |         match *token {
[INFO] [stderr] 26 |             Token::OpenParen => {
[INFO] [stderr] 27 |                 let inner = try!(parse_level(tokens, level + 1));
[INFO] [stderr] 28 |                 ast_nodes.push(List(inner));
[INFO] [stderr] 29 |             },
[INFO] [stderr] 30 |             Token::CloseParen => {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/parser/mod.rs:41:40
[INFO] [stderr]    |
[INFO] [stderr] 41 |                 ast_nodes.push(Integer(val.clone()));
[INFO] [stderr]    |                                        ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/parser/mod.rs:44:40
[INFO] [stderr]    |
[INFO] [stderr] 44 |                 ast_nodes.push(Boolean(val.clone()));
[INFO] [stderr]    |                                        ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/interpreter/value.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         match self {
[INFO] [stderr] 34 | |             &Symbol(_) => format!("'{}", self.display()),
[INFO] [stderr] 35 | |             &List(_) => format!("'{}", self.display()),
[INFO] [stderr] 36 | |             _ => self.display()
[INFO] [stderr] 37 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 33 |         match *self {
[INFO] [stderr] 34 |             Symbol(_) => format!("'{}", self.display()),
[INFO] [stderr] 35 |             List(_) => format!("'{}", self.display()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/interpreter/value.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 | /         match self {
[INFO] [stderr] 42 | |             &Symbol(ref val) => format!("{}", val),
[INFO] [stderr] 43 | |             &Integer(val) => format!("{}", val),
[INFO] [stderr] 44 | |             &Boolean(val) => format!("#{}", if val { "t" } else { "f" }),
[INFO] [stderr] ...  |
[INFO] [stderr] 59 | |             &Func(_, _) => format!("#<procedure>")
[INFO] [stderr] 60 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 41 |         match *self {
[INFO] [stderr] 42 |             Symbol(ref val) => format!("{}", val),
[INFO] [stderr] 43 |             Integer(val) => format!("{}", val),
[INFO] [stderr] 44 |             Boolean(val) => format!("#{}", if val { "t" } else { "f" }),
[INFO] [stderr] 45 |             StringValue(ref val) => format!("\"{}\"", val),
[INFO] [stderr] 46 |             List(ref val) => {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/interpreter/value.rs:42:33
[INFO] [stderr]    |
[INFO] [stderr] 42 |             &Symbol(ref val) => format!("{}", val),
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `val.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/interpreter/value.rs:59:28
[INFO] [stderr]    |
[INFO] [stderr] 59 |             &Func(_, _) => format!("#<procedure>")
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"#<procedure>".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/interpreter/runtime.rs:30:39
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn is_var_defined(&self, key: &String) -> bool {
[INFO] [stderr]    |                                       ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/interpreter/runtime.rs:34:38
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn get_var_value(&self, key: &String) -> Option<Value> {
[INFO] [stderr]    |                                      ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/interpreter/mod.rs:26:24
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub fn eval(ast_nodes: &Vec<ASTNode>, runtime: &RuntimeNode) -> Result<Value, RuntimeError> {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ help: change this to: `&[ASTNode]`
[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 all patterns
[INFO] [stderr]   --> src/interpreter/mod.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | /     match node {
[INFO] [stderr] 38 | |         &ASTNode::Identifier(ref v) => {
[INFO] [stderr] 39 | |             if let Some(val) = runtime.borrow().get_var_value(v) {
[INFO] [stderr] 40 | |                 Ok(val)
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |         }
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 37 |     match *node {
[INFO] [stderr] 38 |         ASTNode::Identifier(ref v) => {
[INFO] [stderr] 39 |             if let Some(val) = runtime.borrow().get_var_value(v) {
[INFO] [stderr] 40 |                 Ok(val)
[INFO] [stderr] 41 |             } else {
[INFO] [stderr] 42 |                 runtime_error!("Identifier not found! {:?}", node)
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/interpreter/mod.rs:49:16
[INFO] [stderr]    |
[INFO] [stderr] 49 |             if vec.len() > 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vec.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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/interpreter/mod.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn eval_list(nodes: &Vec<ASTNode>, env: RuntimeNode) -> Result<Value, RuntimeError> {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^ help: change this to: `&[ASTNode]`
[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: called `.get().unwrap()` on a slice. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/interpreter/mod.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let first = nodes.get(0).unwrap();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^ help: try this: `&nodes[0]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/interpreter/mod.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | /     match first {
[INFO] [stderr] 62 | |         &ASTNode::Identifier(ref func) => {
[INFO] [stderr] 63 | |             match func.as_str() {
[INFO] [stderr] 64 | |                 "define" => define(nodes, env),
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |         }
[INFO] [stderr] 91 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 61 |     match *first {
[INFO] [stderr] 62 |         ASTNode::Identifier(ref func) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/interpreter/mod.rs:95:5
[INFO] [stderr]     |
[INFO] [stderr] 95  | /     match ast_node {
[INFO] [stderr] 96  | |         &ASTNode::Identifier(ref v) => Ok(Symbol(v.clone())),
[INFO] [stderr] 97  | |         &ASTNode::Integer(v) => Ok(Integer(v)),
[INFO] [stderr] 98  | |         &ASTNode::Boolean(v) => Ok(Boolean(v)),
[INFO] [stderr] ...   |
[INFO] [stderr] 104 | |         }
[INFO] [stderr] 105 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 95  |     match *ast_node {
[INFO] [stderr] 96  |         ASTNode::Identifier(ref v) => Ok(Symbol(v.clone())),
[INFO] [stderr] 97  |         ASTNode::Integer(v) => Ok(Integer(v)),
[INFO] [stderr] 98  |         ASTNode::Boolean(v) => Ok(Boolean(v)),
[INFO] [stderr] 99  |         ASTNode::StringNode(ref v) => Ok(StringValue(v.clone())),
[INFO] [stderr] 100 |         ASTNode::List(ref values) => {
[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/interpreter/mod.rs:108:22
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn define(ast_nodes: &Vec<ASTNode>, runtime: RuntimeNode) -> Result<Value, RuntimeError> {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^ help: change this to: `&[ASTNode]`
[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 all patterns
[INFO] [stderr]    --> src/interpreter/mod.rs:111:16
[INFO] [stderr]     |
[INFO] [stderr] 111 |       let name = match node_at!(ast_nodes, 1) {
[INFO] [stderr]     |  ________________^
[INFO] [stderr] 112 | |         &ASTNode::Identifier(ref x) => x,
[INFO] [stderr] 113 | |         _ => runtime_error!("Bad variable name in 'define': {:?}", ast_nodes)
[INFO] [stderr] 114 | |     };
[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] thread 'main' panicked at 'byte index 38 is out of bounds of `    let mut result = empty!();`', src/libcore/str/mod.rs:2092:9
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x7f3b6598ac53 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h00d1e05a61bd440b
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
[INFO] [stderr]    1:     0x7f3b65982368 - std::sys_common::backtrace::_print::hc0d53aca8da62f75
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x7f3b659876c2 - std::panicking::default_hook::{{closure}}::h46d30bcc4bfff149
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    3:     0x7f3b6598742d - std::panicking::default_hook::h017696c2a8b7b16f
[INFO] [stderr]                                at src/libstd/panicking.rs:227
[INFO] [stderr]    4:     0x7f3b6790e813 - rustc::util::common::panic_hook::h0c2559a338a9af32
[INFO] [stderr]    5:     0x7f3b65987ea9 - std::panicking::rust_panic_with_hook::h8cbdfe43764887be
[INFO] [stderr]                                at src/libstd/panicking.rs:495
[INFO] [stderr]    6:     0x7f3b65987951 - std::panicking::continue_panic_fmt::h3d3c5a833c00a5e1
[INFO] [stderr]                                at src/libstd/panicking.rs:398
[INFO] [stderr]    7:     0x7f3b65987835 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:325
[INFO] [stderr]    8:     0x7f3b659af0bc - core::panicking::panic_fmt::h4d67173bc68f6d5a
[INFO] [stderr]                                at src/libcore/panicking.rs:95
[INFO] [stderr]    9:     0x7f3b659b161d - core::str::slice_error_fail::h2f8a3b25099b18dc
[INFO] [stderr]                                at src/libcore/str/mod.rs:0
[INFO] [stderr]   10:     0x7f3b667bd238 - core::str::traits::<impl core::slice::SliceIndex<str> for core::ops::range::RangeTo<usize>>::index::{{closure}}::h4971ebf7c303fb06
[INFO] [stderr]   11:     0x7f3b667bfced - <core::iter::Map<I, F> as core::iter::iterator::Iterator>::fold::h7c7c970f8732e403
[INFO] [stderr]   12:     0x7f3b667a9b25 - <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter::hcf81033af4d7a756
[INFO] [stderr]   13:     0x7f3b6679349f - <rustc_errors::emitter::EmitterWriter as rustc_errors::emitter::Emitter>::emit::h50e1d2cf7b978a5a
[INFO] [stderr]   14:     0x7f3b667b81b3 - rustc_errors::Handler::emit_db::h60fb65338a7b5561
[INFO] [stderr]   15:     0x7f3b667a4e27 - rustc_errors::diagnostic_builder::DiagnosticBuilder::emit::h99e2c4975c3f8028
[INFO] [stderr]   16:     0x55fac5705e08 - clippy_lints::utils::span_lint_and_then::h795763088feffed0
[INFO] [stderr]   17:     0x55fac56b8236 - <clippy_lints::matches::MatchPass as rustc::lint::LateLintPass<'a, 'tcx>>::check_expr::h5bb1e9cafccfa4fb
[INFO] [stderr]   18:     0x7f3b678dd4c0 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr::h8a29c722cdf7cb16
[INFO] [stderr]   19:     0x7f3b678df361 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_local::hd79792d840fd268c
[INFO] [stderr]   20:     0x7f3b678df5ec - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_block::h6655506fe3948600
[INFO] [stderr]   21:     0x7f3b678dd58a - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr::h8a29c722cdf7cb16
[INFO] [stderr]   22:     0x7f3b678dc63f - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_body::h21cf9292ae8432c6
[INFO] [stderr]   23:     0x7f3b678dc47c - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_nested_body::he8fb9a062ac4b1c8
[INFO] [stderr]   24:     0x7f3b678ddcce - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_fn::h4aaa2b7e199bfb22
[INFO] [stderr]   25:     0x7f3b6783e2c6 - rustc::hir::intravisit::walk_item::hada2286ef6037169
[INFO] [stderr]   26:     0x7f3b678dcb0b - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item::h4954886470941d9b
[INFO] [stderr]   27:     0x7f3b678defa0 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod::h10e5a891f2fbd5fe
[INFO] [stderr]   28:     0x7f3b6783e0e8 - rustc::hir::intravisit::walk_item::hada2286ef6037169
[INFO] [stderr]   29:     0x7f3b678dcb0b - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_item::h4954886470941d9b
[INFO] [stderr]   30:     0x7f3b678defa0 - <rustc::lint::context::LateContext<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_mod::h10e5a891f2fbd5fe
[INFO] [stderr]   31:     0x7f3b6782fc3e - rustc::hir::intravisit::walk_crate::h4afac11c57fcab86
[INFO] [stderr]   32:     0x7f3b678e629b - rustc::lint::context::check_crate::hccbef8b90ef472b3
[INFO] [stderr]   33:     0x7f3b68511f25 - rustc::util::common::time::hf306edffe5bc1331
[INFO] [stderr]   34:     0x7f3b6858bc7e - rustc::ty::context::tls::enter_context::he8336509407aafca
[INFO] [stderr]   35:     0x7f3b6855ab81 - <std::thread::local::LocalKey<T>>::with::h104ad8c2b4754810
[INFO] [stderr]   36:     0x7f3b6858eea5 - rustc::ty::context::TyCtxt::create_and_enter::h74cefb108a2f7b6f
[INFO] [stderr]   37:     0x7f3b684e2915 - rustc_driver::driver::compile_input::hca3f044299fe7ad7
[INFO] [stderr]   38:     0x7f3b685ae352 - rustc_driver::run_compiler_with_pool::hafad319513331ac6
[INFO] [stderr]   39:     0x7f3b684eb415 - <scoped_tls::ScopedKey<T>>::set::h8ef00e2a892c3c56
[INFO] [stderr]   40:     0x7f3b685ad37a - rustc_driver::run_compiler::h7e74f116e6e5e483
[INFO] [stderr]   41:     0x55fac556ecd7 - <scoped_tls::ScopedKey<T>>::set::h8ec3c2b8cbec5474
[INFO] [stderr]   42:     0x55fac555d5d2 - syntax::with_globals::h5a01e3b26631ef2a
[INFO] [stderr]   43:     0x7f3b659a4319 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:102
[INFO] [stderr]   44:     0x55fac555e71b - rustc_driver::run::hccd91432ebf6f6b3
[INFO] [stderr]   45:     0x55fac556c92b - clippy_driver::main::hf97ab97bd1d252bd
[INFO] [stderr]   46:     0x55fac556b122 - std::rt::lang_start::{{closure}}::h090d6ed12d543f7e
[INFO] [stderr]   47:     0x7f3b659877d2 - std::panicking::try::do_call::h69790245ac2d03fe
[INFO] [stderr]                                at src/libstd/rt.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:310
[INFO] [stderr]   48:     0x7f3b659a4319 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:102
[INFO] [stderr]   49:     0x7f3b65988263 - std::rt::lang_start_internal::h540c897fe52ba9c5
[INFO] [stderr]                                at src/libstd/panicking.rs:289
[INFO] [stderr]                                at src/libstd/panic.rs:398
[INFO] [stderr]                                at src/libstd/rt.rs:58
[INFO] [stderr]   50:     0x55fac556c971 - main
[INFO] [stderr]   51:     0x7f3b6516e2e0 - __libc_start_main
[INFO] [stderr]   52:     0x55fac5555b88 - <unknown>
[INFO] [stderr] query stack during panic:
[INFO] [stderr] end of query stack
[INFO] [stderr] 
[INFO] [stderr] error: internal compiler error: unexpected panic
[INFO] [stderr] 
[INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug.
[INFO] [stderr] 
[INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.32.0 (9fda7c223 2019-01-16) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: -C debuginfo=2
[INFO] [stderr] 
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `mscheme`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3ca9ce2091afdf5158def8c8e76096c7335a8d05bd5aadad76ceed5d6813f5c2"`
[INFO] running `"docker" "rm" "-f" "3ca9ce2091afdf5158def8c8e76096c7335a8d05bd5aadad76ceed5d6813f5c2"`
[INFO] [stdout] 3ca9ce2091afdf5158def8c8e76096c7335a8d05bd5aadad76ceed5d6813f5c2