[INFO] cloning repository https://github.com/rdni/interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rdni/interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frdni%2Finterpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frdni%2Finterpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3db731d6c384f74617bc692a607f77b73aedcec
[INFO] linting rdni/interpreter against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frdni%2Finterpreter" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rdni/interpreter
[INFO] finished tweaking git repo https://github.com/rdni/interpreter
[INFO] tweaked toml for git repo https://github.com/rdni/interpreter written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rdni/interpreter on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rdni/interpreter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6dd4fca90981c10ae8fdb09a04d648128733599fb9b3c297821f84c829ff2a80
[INFO] running `Command { std: "docker" "start" "-a" "6dd4fca90981c10ae8fdb09a04d648128733599fb9b3c297821f84c829ff2a80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6dd4fca90981c10ae8fdb09a04d648128733599fb9b3c297821f84c829ff2a80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd4fca90981c10ae8fdb09a04d648128733599fb9b3c297821f84c829ff2a80", kill_on_drop: false }`
[INFO] [stdout] 6dd4fca90981c10ae8fdb09a04d648128733599fb9b3c297821f84c829ff2a80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4cb04c9ef22c2cc6a3c807210e989628500079dff5a6a45e1d684cb44e63085e
[INFO] running `Command { std: "docker" "start" "-a" "4cb04c9ef22c2cc6a3c807210e989628500079dff5a6a45e1d684cb44e63085e", kill_on_drop: false }`
[INFO] [stderr]     Checking interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]    --> src/frontend/parser.rs:291:17
[INFO] [stdout]     |
[INFO] [stdout] 291 |                 value: value
[INFO] [stdout]     |                 ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout]     = note: `#[warn(clippy::redundant_field_names)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]    --> src/frontend/parser.rs:291:17
[INFO] [stdout]     |
[INFO] [stdout] 291 |                 value: value
[INFO] [stdout]     |                 ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout]     = note: `#[warn(clippy::redundant_field_names)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of an `Arc` that is not `Send` and `Sync`
[INFO] [stdout]    --> src/frontend/ast.rs:162:27
[INFO] [stdout]     |
[INFO] [stdout] 162 |             let new_env = Arc::new(Mutex::new(Environment::new(Some(Arc::clone(&env)))));
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Arc<Mutex<Environment>>` is not `Send` and `Sync` as `Mutex<Environment>` is neither `Send` nor `Sync`
[INFO] [stdout]     = help: if the `Arc` will not be used across threads replace it with an `Rc`
[INFO] [stdout]     = help: otherwise make `Mutex<Environment>` `Send` and `Sync` or consider a wrapper type such as `Mutex`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[INFO] [stdout]     = note: `#[warn(clippy::arc_with_non_send_sync)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/frontend/lexer.rs:83:15
[INFO] [stdout]    |
[INFO] [stdout] 83 |         while src.len() > 0 {
[INFO] [stdout]    |               ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]    = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/frontend/lexer.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 | /             if src[0] == '/' {
[INFO] [stdout] 85 | |                 if src.len() > 1 {
[INFO] [stdout] 86 | |                     if src[1] == '/' {
[INFO] [stdout] 87 | |                         while src[0] != '\n' || src[0] != '\r' {
[INFO] [stdout] ...  |
[INFO] [stdout] 92 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]    = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 84 ~             if src[0] == '/'
[INFO] [stdout] 85 ~                 && src.len() > 1 {
[INFO] [stdout] 86 |                     if src[1] == '/' {
[INFO] [stdout] ...
[INFO] [stdout] 90 |                     }
[INFO] [stdout] 91 ~                 }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/frontend/lexer.rs:85:17
[INFO] [stdout]    |
[INFO] [stdout] 85 | /                 if src.len() > 1 {
[INFO] [stdout] 86 | |                     if src[1] == '/' {
[INFO] [stdout] 87 | |                         while src[0] != '\n' || src[0] != '\r' {
[INFO] [stdout] 88 | |                             src.remove(0);
[INFO] [stdout] ...  |
[INFO] [stdout] 91 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 85 ~                 if src.len() > 1
[INFO] [stdout] 86 ~                     && src[1] == '/' {
[INFO] [stdout] 87 |                         while src[0] != '\n' || src[0] != '\r' {
[INFO] [stdout] 88 |                             src.remove(0);
[INFO] [stdout] 89 |                         }
[INFO] [stdout] 90 ~                     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/frontend/lexer.rs:130:23
[INFO] [stdout]     |
[INFO] [stdout] 130 |                 while src.len() > 0 && (src[0] != '"' || escaped) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/frontend/lexer.rs:166:27
[INFO] [stdout]     |
[INFO] [stdout] 166 |                     while src.len() > 0 && (src[0].is_numeric() || src[0] == '.') {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/frontend/lexer.rs:174:27
[INFO] [stdout]     |
[INFO] [stdout] 174 |                     while src.len() > 0 && (is_valid_ident_char(src[0])) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:208:9
[INFO] [stdout]     |
[INFO] [stdout] 208 | /         return StmtWrapper::new(Box::new(ReturnStmt {
[INFO] [stdout] 209 | |             kind: NodeType::Return,
[INFO] [stdout] 210 | |             value
[INFO] [stdout] 211 | |         }));
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 208 ~         StmtWrapper::new(Box::new(ReturnStmt {
[INFO] [stdout] 209 +             kind: NodeType::Return,
[INFO] [stdout] 210 +             value
[INFO] [stdout] 211 ~         }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 | /         return StmtWrapper::new(Box::new(FunctionDeclaration { 
[INFO] [stdout] 233 | |             kind: NodeType::FunctionDeclaration,
[INFO] [stdout] 234 | |             parameters: params,
[INFO] [stdout] 235 | |             name,
[INFO] [stdout] 236 | |             body,
[INFO] [stdout] 237 | |         }));
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 232 ~         StmtWrapper::new(Box::new(FunctionDeclaration { 
[INFO] [stdout] 233 +             kind: NodeType::FunctionDeclaration,
[INFO] [stdout] 234 +             parameters: params,
[INFO] [stdout] 235 +             name,
[INFO] [stdout] 236 +             body,
[INFO] [stdout] 237 ~         }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/frontend/parser.rs:403:31
[INFO] [stdout]     |
[INFO] [stdout] 403 |         if !self.not_eof() && !self.at_comparative_expr().is_none() {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `self.at_comparative_expr().is_some()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:498:8
[INFO] [stdout]     |
[INFO] [stdout] 498 |        return args;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 498 -        return args;
[INFO] [stdout] 498 +        args
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:509:9
[INFO] [stdout]     |
[INFO] [stdout] 509 |         return args;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 509 -         return args;
[INFO] [stdout] 509 +         args
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting float literal to `f64` is unnecessary
[INFO] [stdout]   --> src/runtime/interpreter.rs:17:107
[INFO] [stdout]    |
[INFO] [stdout] 17 |             Box::new(MK_NUMBER!(if let StmtValue::F64(val) = ast_node.get_value().unwrap() { val } else { 0.0 as f64}))},
[INFO] [stdout]    |                                                                                                           ^^^^^^^^^^ help: try: `0.0_f64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let value = eval_identifier(identifier.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ------------------------------------------------------------------ unnecessary `let` binding
[INFO] [stdout] 31 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 30 ~             
[INFO] [stdout] 31 ~             (eval_identifier(identifier.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             let value = eval_object_expr(object.clone(), Arc::clone(&env));
[INFO] [stdout]    |             --------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 36 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 35 ~             
[INFO] [stdout] 36 ~             (eval_object_expr(object.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |             let value = eval_member_expr(member_expr.clone(), Arc::clone(&env));
[INFO] [stdout]    |             -------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 45 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 44 ~             
[INFO] [stdout] 45 ~             (eval_member_expr(member_expr.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let value = eval_assignment(assignment_expr.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ----------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 50 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 49 ~             
[INFO] [stdout] 50 ~             (eval_assignment(assignment_expr.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let value = eval_call(call_expr.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ----------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 55 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 54 ~             
[INFO] [stdout] 55 ~             (eval_call(call_expr.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let value = eval_var_declaration(var_declaration.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ---------------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 61 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 60 ~             
[INFO] [stdout] 61 ~             (eval_var_declaration(var_declaration.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let value = eval_function_declaration(function_declaration.clone(), Arc::clone(&env));
[INFO] [stdout]    |             -------------------------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 66 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 65 ~             
[INFO] [stdout] 66 ~             (eval_function_declaration(function_declaration.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `BooleanValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/runtime/values.rs:70:18
[INFO] [stdout]    |
[INFO] [stdout] 70 |         Box::new(self.clone())
[INFO] [stdout]    |                  ^^^^^^^^^^^^ help: try dereferencing it: `*self`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]    = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]    --> src/runtime/values.rs:124:18
[INFO] [stdout]     |
[INFO] [stdout] 124 |         Box::new(self.clone())
[INFO] [stdout]     |                  ^^^^^^^^^^^^ help: try dereferencing it: `*self`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `std::string::String`
[INFO] [stdout]    --> src/runtime/values.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |             String::from(self.value.to_string().replace(".0", ""))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `self.value.to_string().replace(".0", "")`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout]     = note: `#[warn(clippy::useless_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `std::string::String`
[INFO] [stdout]    --> src/runtime/values.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             String::from(self.value.to_string())
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `self.value.to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/runtime/values.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |         self.properties.len() != 0
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!self.properties.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]    --> src/runtime/values.rs:219:23
[INFO] [stdout]     |
[INFO] [stdout] 219 |             value += &format!("{}", property.to_string());
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `property.to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]     = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/runtime/values.rs:228:9
[INFO] [stdout]     |
[INFO] [stdout] 228 |         self.elements.len() != 0
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!self.elements.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stdout]    --> src/runtime/values.rs:241:15
[INFO] [stdout]     |
[INFO] [stdout] 241 |     pub func: Rc<dyn Fn(Vec<Box<dyn RuntimeValue>>, &Mutex<Environment>) -> Box<dyn RuntimeValue> + 'static>,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stdout]     = note: `#[warn(clippy::type_complexity)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/runtime/values.rs:303:9
[INFO] [stdout]     |
[INFO] [stdout] 303 |         self.value.len() != 0
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!self.value.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of an `Arc` that is not `Send` and `Sync`
[INFO] [stdout]    --> src/runtime/values.rs:320:23
[INFO] [stdout]     |
[INFO] [stdout] 320 |         let new_env = Arc::new(Mutex::new(Environment::new(Some(Arc::clone(&env)))));
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Arc<Mutex<Environment>>` is not `Send` and `Sync` as `Mutex<Environment>` is neither `Send` nor `Sync`
[INFO] [stdout]     = help: if the `Arc` will not be used across threads replace it with an `Rc`
[INFO] [stdout]     = help: otherwise make `Mutex<Environment>` `Send` and `Sync` or consider a wrapper type such as `Mutex`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stdout]   --> src/runtime/environment.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |         if let None = parent {
[INFO] [stdout]    |         -------^^^^--------- help: try: `if parent.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this will change drop order of the result, as well as all temporaries
[INFO] [stdout]    = note: add `#[allow(clippy::redundant_pattern_matching)]` if this is important
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stdout]    = note: `#[warn(clippy::redundant_pattern_matching)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `if let .. else` expression looks like `matches!` macro
[INFO] [stdout]   --> src/runtime/environment.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         if let None = self.parent {
[INFO] [stdout] 70 | |             true
[INFO] [stdout] 71 | |         } else {
[INFO] [stdout] 72 | |             false
[INFO] [stdout] 73 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout]    = note: `#[warn(clippy::match_like_matches_macro)]` on by default
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]    |
[INFO] [stdout] 69 -         if let None = self.parent {
[INFO] [stdout] 70 -             true
[INFO] [stdout] 71 -         } else {
[INFO] [stdout] 72 -             false
[INFO] [stdout] 73 -         }
[INFO] [stdout] 69 +         matches!(self.parent, None)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stdout]   --> src/runtime/environment.rs:69:16
[INFO] [stdout]    |
[INFO] [stdout] 69 |         if let None = self.parent {
[INFO] [stdout]    |         -------^^^^-------------- help: try: `if self.parent.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this will change drop order of the result, as well as all temporaries
[INFO] [stdout]    = note: add `#[allow(clippy::redundant_pattern_matching)]` if this is important
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/runtime/environment.rs:101:24
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Arc::clone(&inner)
[INFO] [stdout]     |                        ^^^^^^ help: change this to: `inner`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/runtime/environment.rs:104:39
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 Some(v) => Arc::clone(&v),
[INFO] [stdout]     |                                       ^^ help: change this to: `v`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded late initialization
[INFO] [stdout]    --> src/runtime/environment.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let env;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
[INFO] [stdout]     = note: `#[warn(clippy::needless_late_init)]` on by default
[INFO] [stdout] help: move the declaration `env` here and remove the assignments from the branches
[INFO] [stdout]     |
[INFO] [stdout] 120 ~         
[INFO] [stdout] 121 ~         let env = if bypass {
[INFO] [stdout] 122 ~             Arc::clone(&self.0)
[INFO] [stdout] 123 |         } else {
[INFO] [stdout] 124 ~             self.resolve(&varname)
[INFO] [stdout] 125 ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/runtime/native_funcs.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     return Box::new(NumberValue {
[INFO] [stdout] 22 | |         value: SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs_f64()
[INFO] [stdout] 23 | |     });
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 21 ~     Box::new(NumberValue {
[INFO] [stdout] 22 +         value: SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs_f64()
[INFO] [stdout] 23 ~     })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/runtime/native_funcs.rs:35:18
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let number = args[0].as_any().downcast_ref::<NumberValue>().unwrap().clone();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*args[0].as_any().downcast_ref::<NumberValue>().unwrap()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/runtime/native_funcs.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | /     if args.len() == 1 {
[INFO] [stdout] 48 | |         if args[0].get_type() == ValueType::String {
[INFO] [stdout] 49 | |             print!("{}", args[0].as_any().downcast_ref::<StringValue>().expect("Failed to downcast to StringValue.").to_string());
[INFO] [stdout] 50 | |             io::stdout().flush().unwrap();
[INFO] [stdout] 51 | |         }
[INFO] [stdout] 52 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 47 ~     if args.len() == 1
[INFO] [stdout] 48 ~         && args[0].get_type() == ValueType::String {
[INFO] [stdout] 49 |             print!("{}", args[0].as_any().downcast_ref::<StringValue>().expect("Failed to downcast to StringValue.").to_string());
[INFO] [stdout] 50 |             io::stdout().flush().unwrap();
[INFO] [stdout] 51 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/eval/eval_statements.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     return Box::new(NullValue {});
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 29 -     return Box::new(NullValue {});
[INFO] [stdout] 29 +     Box::new(NullValue {})
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: equality checks against true are unnecessary
[INFO] [stdout]   --> src/eval/eval_statements.rs:58:11
[INFO] [stdout]    |
[INFO] [stdout] 58 |     while eval(while_stmt.condition.to_stmt_from_expr(), last_env).as_bool() == true {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `eval(while_stmt.condition.to_stmt_from_expr(), last_env).as_bool()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stdout]    = note: `#[warn(clippy::bool_comparison)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/eval/eval_statements.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |         if iterable.elements.len() == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `iterable.elements.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/eval/eval_expressions.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 |             number = rhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue").clone();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue")`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/eval/eval_expressions.rs:30:22
[INFO] [stdout]    |
[INFO] [stdout] 30 |             number = lhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue").clone();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*lhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue")`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]    --> src/eval/eval_expressions.rs:184:32
[INFO] [stdout]     |
[INFO] [stdout] 184 | ... = eval(member_expr.property.to_stmt_from_expr(), Arc::clone(&env)).as_any().downcast_ref::<NumberValue>().expect("Expected number when indexing list").clone();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*eval(member_expr.property.to_stmt_from_expr(), Arc::clone(&env)).as_any().downcast_ref::<NumberValue>().expect("Expected number when indexing list")`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/eval/eval_expressions.rs:223:5
[INFO] [stdout]     |
[INFO] [stdout] 223 |     return Box::new(object);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 223 -     return Box::new(object);
[INFO] [stdout] 223 +     Box::new(object)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing last element with `obj.elements.get(obj.elements.len() - 1)`
[INFO] [stdout]    --> src/eval/eval_expressions.rs:280:20
[INFO] [stdout]     |
[INFO] [stdout] 280 |             return obj.elements.get(obj.elements.len() - 1).unwrap().clone();
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `obj.elements.last()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_last_with_len
[INFO] [stdout]     = note: `#[warn(clippy::get_last_with_len)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of an `Arc` that is not `Send` and `Sync`
[INFO] [stdout]    --> src/frontend/ast.rs:162:27
[INFO] [stdout]     |
[INFO] [stdout] 162 |             let new_env = Arc::new(Mutex::new(Environment::new(Some(Arc::clone(&env)))));
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Arc<Mutex<Environment>>` is not `Send` and `Sync` as `Mutex<Environment>` is neither `Send` nor `Sync`
[INFO] [stdout]     = help: if the `Arc` will not be used across threads replace it with an `Rc`
[INFO] [stdout]     = help: otherwise make `Mutex<Environment>` `Send` and `Sync` or consider a wrapper type such as `Mutex`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[INFO] [stdout]     = note: `#[warn(clippy::arc_with_non_send_sync)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/frontend/lexer.rs:83:15
[INFO] [stdout]    |
[INFO] [stdout] 83 |         while src.len() > 0 {
[INFO] [stdout]    |               ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]    = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/frontend/lexer.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 | /             if src[0] == '/' {
[INFO] [stdout] 85 | |                 if src.len() > 1 {
[INFO] [stdout] 86 | |                     if src[1] == '/' {
[INFO] [stdout] 87 | |                         while src[0] != '\n' || src[0] != '\r' {
[INFO] [stdout] ...  |
[INFO] [stdout] 92 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]    = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 84 ~             if src[0] == '/'
[INFO] [stdout] 85 ~                 && src.len() > 1 {
[INFO] [stdout] 86 |                     if src[1] == '/' {
[INFO] [stdout] ...
[INFO] [stdout] 90 |                     }
[INFO] [stdout] 91 ~                 }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/frontend/lexer.rs:85:17
[INFO] [stdout]    |
[INFO] [stdout] 85 | /                 if src.len() > 1 {
[INFO] [stdout] 86 | |                     if src[1] == '/' {
[INFO] [stdout] 87 | |                         while src[0] != '\n' || src[0] != '\r' {
[INFO] [stdout] 88 | |                             src.remove(0);
[INFO] [stdout] ...  |
[INFO] [stdout] 91 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 85 ~                 if src.len() > 1
[INFO] [stdout] 86 ~                     && src[1] == '/' {
[INFO] [stdout] 87 |                         while src[0] != '\n' || src[0] != '\r' {
[INFO] [stdout] 88 |                             src.remove(0);
[INFO] [stdout] 89 |                         }
[INFO] [stdout] 90 ~                     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/frontend/lexer.rs:130:23
[INFO] [stdout]     |
[INFO] [stdout] 130 |                 while src.len() > 0 && (src[0] != '"' || escaped) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/frontend/lexer.rs:166:27
[INFO] [stdout]     |
[INFO] [stdout] 166 |                     while src.len() > 0 && (src[0].is_numeric() || src[0] == '.') {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/frontend/lexer.rs:174:27
[INFO] [stdout]     |
[INFO] [stdout] 174 |                     while src.len() > 0 && (is_valid_ident_char(src[0])) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!src.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of an `Arc` that is not `Send` and `Sync`
[INFO] [stdout]   --> src/main.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let env = Arc::new(Mutex::new(Environment::new(None)));
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Arc<Mutex<Environment>>` is not `Send` and `Sync` as `Mutex<Environment>` is neither `Send` nor `Sync`
[INFO] [stdout]    = help: if the `Arc` will not be used across threads replace it with an `Rc`
[INFO] [stdout]    = help: otherwise make `Mutex<Environment>` `Send` and `Sync` or consider a wrapper type such as `Mutex`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[INFO] [stdout]    = note: `#[warn(clippy::arc_with_non_send_sync)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:208:9
[INFO] [stdout]     |
[INFO] [stdout] 208 | /         return StmtWrapper::new(Box::new(ReturnStmt {
[INFO] [stdout] 209 | |             kind: NodeType::Return,
[INFO] [stdout] 210 | |             value
[INFO] [stdout] 211 | |         }));
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 208 ~         StmtWrapper::new(Box::new(ReturnStmt {
[INFO] [stdout] 209 +             kind: NodeType::Return,
[INFO] [stdout] 210 +             value
[INFO] [stdout] 211 ~         }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 | /         return StmtWrapper::new(Box::new(FunctionDeclaration { 
[INFO] [stdout] 233 | |             kind: NodeType::FunctionDeclaration,
[INFO] [stdout] 234 | |             parameters: params,
[INFO] [stdout] 235 | |             name,
[INFO] [stdout] 236 | |             body,
[INFO] [stdout] 237 | |         }));
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 232 ~         StmtWrapper::new(Box::new(FunctionDeclaration { 
[INFO] [stdout] 233 +             kind: NodeType::FunctionDeclaration,
[INFO] [stdout] 234 +             parameters: params,
[INFO] [stdout] 235 +             name,
[INFO] [stdout] 236 +             body,
[INFO] [stdout] 237 ~         }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/frontend/parser.rs:403:31
[INFO] [stdout]     |
[INFO] [stdout] 403 |         if !self.not_eof() && !self.at_comparative_expr().is_none() {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `self.at_comparative_expr().is_some()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:498:8
[INFO] [stdout]     |
[INFO] [stdout] 498 |        return args;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 498 -        return args;
[INFO] [stdout] 498 +        args
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/parser.rs:509:9
[INFO] [stdout]     |
[INFO] [stdout] 509 |         return args;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 509 -         return args;
[INFO] [stdout] 509 +         args
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting float literal to `f64` is unnecessary
[INFO] [stdout]   --> src/runtime/interpreter.rs:17:107
[INFO] [stdout]    |
[INFO] [stdout] 17 |             Box::new(MK_NUMBER!(if let StmtValue::F64(val) = ast_node.get_value().unwrap() { val } else { 0.0 as f64}))},
[INFO] [stdout]    |                                                                                                           ^^^^^^^^^^ help: try: `0.0_f64`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let value = eval_identifier(identifier.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ------------------------------------------------------------------ unnecessary `let` binding
[INFO] [stdout] 31 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 30 ~             
[INFO] [stdout] 31 ~             (eval_identifier(identifier.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             let value = eval_object_expr(object.clone(), Arc::clone(&env));
[INFO] [stdout]    |             --------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 36 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 35 ~             
[INFO] [stdout] 36 ~             (eval_object_expr(object.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |             let value = eval_member_expr(member_expr.clone(), Arc::clone(&env));
[INFO] [stdout]    |             -------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 45 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 44 ~             
[INFO] [stdout] 45 ~             (eval_member_expr(member_expr.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let value = eval_assignment(assignment_expr.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ----------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 50 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 49 ~             
[INFO] [stdout] 50 ~             (eval_assignment(assignment_expr.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let value = eval_call(call_expr.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ----------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 55 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 54 ~             
[INFO] [stdout] 55 ~             (eval_call(call_expr.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let value = eval_var_declaration(var_declaration.clone(), Arc::clone(&env));
[INFO] [stdout]    |             ---------------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 61 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 60 ~             
[INFO] [stdout] 61 ~             (eval_var_declaration(var_declaration.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/runtime/interpreter.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let value = eval_function_declaration(function_declaration.clone(), Arc::clone(&env));
[INFO] [stdout]    |             -------------------------------------------------------------------------------------- unnecessary `let` binding
[INFO] [stdout] 66 |             value
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 65 ~             
[INFO] [stdout] 66 ~             (eval_function_declaration(function_declaration.clone(), Arc::clone(&env))) as _
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `BooleanValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/runtime/values.rs:70:18
[INFO] [stdout]    |
[INFO] [stdout] 70 |         Box::new(self.clone())
[INFO] [stdout]    |                  ^^^^^^^^^^^^ help: try dereferencing it: `*self`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]    = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]    --> src/runtime/values.rs:124:18
[INFO] [stdout]     |
[INFO] [stdout] 124 |         Box::new(self.clone())
[INFO] [stdout]     |                  ^^^^^^^^^^^^ help: try dereferencing it: `*self`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `std::string::String`
[INFO] [stdout]    --> src/runtime/values.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |             String::from(self.value.to_string().replace(".0", ""))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `self.value.to_string().replace(".0", "")`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout]     = note: `#[warn(clippy::useless_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `std::string::String`
[INFO] [stdout]    --> src/runtime/values.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             String::from(self.value.to_string())
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `self.value.to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/runtime/values.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |         self.properties.len() != 0
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!self.properties.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]    --> src/runtime/values.rs:219:23
[INFO] [stdout]     |
[INFO] [stdout] 219 |             value += &format!("{}", property.to_string());
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `property.to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]     = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/runtime/values.rs:228:9
[INFO] [stdout]     |
[INFO] [stdout] 228 |         self.elements.len() != 0
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!self.elements.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stdout]    --> src/runtime/values.rs:241:15
[INFO] [stdout]     |
[INFO] [stdout] 241 |     pub func: Rc<dyn Fn(Vec<Box<dyn RuntimeValue>>, &Mutex<Environment>) -> Box<dyn RuntimeValue> + 'static>,
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stdout]     = note: `#[warn(clippy::type_complexity)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/runtime/values.rs:303:9
[INFO] [stdout]     |
[INFO] [stdout] 303 |         self.value.len() != 0
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!self.value.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of an `Arc` that is not `Send` and `Sync`
[INFO] [stdout]    --> src/runtime/values.rs:320:23
[INFO] [stdout]     |
[INFO] [stdout] 320 |         let new_env = Arc::new(Mutex::new(Environment::new(Some(Arc::clone(&env)))));
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Arc<Mutex<Environment>>` is not `Send` and `Sync` as `Mutex<Environment>` is neither `Send` nor `Sync`
[INFO] [stdout]     = help: if the `Arc` will not be used across threads replace it with an `Rc`
[INFO] [stdout]     = help: otherwise make `Mutex<Environment>` `Send` and `Sync` or consider a wrapper type such as `Mutex`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stdout]   --> src/runtime/environment.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |         if let None = parent {
[INFO] [stdout]    |         -------^^^^--------- help: try: `if parent.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this will change drop order of the result, as well as all temporaries
[INFO] [stdout]    = note: add `#[allow(clippy::redundant_pattern_matching)]` if this is important
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stdout]    = note: `#[warn(clippy::redundant_pattern_matching)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `if let .. else` expression looks like `matches!` macro
[INFO] [stdout]   --> src/runtime/environment.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         if let None = self.parent {
[INFO] [stdout] 70 | |             true
[INFO] [stdout] 71 | |         } else {
[INFO] [stdout] 72 | |             false
[INFO] [stdout] 73 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout]    = note: `#[warn(clippy::match_like_matches_macro)]` on by default
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]    |
[INFO] [stdout] 69 -         if let None = self.parent {
[INFO] [stdout] 70 -             true
[INFO] [stdout] 71 -         } else {
[INFO] [stdout] 72 -             false
[INFO] [stdout] 73 -         }
[INFO] [stdout] 69 +         matches!(self.parent, None)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stdout]   --> src/runtime/environment.rs:69:16
[INFO] [stdout]    |
[INFO] [stdout] 69 |         if let None = self.parent {
[INFO] [stdout]    |         -------^^^^-------------- help: try: `if self.parent.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this will change drop order of the result, as well as all temporaries
[INFO] [stdout]    = note: add `#[allow(clippy::redundant_pattern_matching)]` if this is important
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/runtime/environment.rs:101:24
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Arc::clone(&inner)
[INFO] [stdout]     |                        ^^^^^^ help: change this to: `inner`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/runtime/environment.rs:104:39
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 Some(v) => Arc::clone(&v),
[INFO] [stdout]     |                                       ^^ help: change this to: `v`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded late initialization
[INFO] [stdout]    --> src/runtime/environment.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let env;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
[INFO] [stdout]     = note: `#[warn(clippy::needless_late_init)]` on by default
[INFO] [stdout] help: move the declaration `env` here and remove the assignments from the branches
[INFO] [stdout]     |
[INFO] [stdout] 120 ~         
[INFO] [stdout] 121 ~         let env = if bypass {
[INFO] [stdout] 122 ~             Arc::clone(&self.0)
[INFO] [stdout] 123 |         } else {
[INFO] [stdout] 124 ~             self.resolve(&varname)
[INFO] [stdout] 125 ~         };
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/runtime/native_funcs.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     return Box::new(NumberValue {
[INFO] [stdout] 22 | |         value: SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs_f64()
[INFO] [stdout] 23 | |     });
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 21 ~     Box::new(NumberValue {
[INFO] [stdout] 22 +         value: SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs_f64()
[INFO] [stdout] 23 ~     })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of an `Arc` that is not `Send` and `Sync`
[INFO] [stdout]   --> src/main.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let env = Arc::new(Mutex::new(Environment::new(None)));
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Arc<Mutex<Environment>>` is not `Send` and `Sync` as `Mutex<Environment>` is neither `Send` nor `Sync`
[INFO] [stdout]    = help: if the `Arc` will not be used across threads replace it with an `Rc`
[INFO] [stdout]    = help: otherwise make `Mutex<Environment>` `Send` and `Sync` or consider a wrapper type such as `Mutex`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
[INFO] [stdout]    = note: `#[warn(clippy::arc_with_non_send_sync)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/runtime/native_funcs.rs:35:18
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let number = args[0].as_any().downcast_ref::<NumberValue>().unwrap().clone();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*args[0].as_any().downcast_ref::<NumberValue>().unwrap()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/runtime/native_funcs.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | /     if args.len() == 1 {
[INFO] [stdout] 48 | |         if args[0].get_type() == ValueType::String {
[INFO] [stdout] 49 | |             print!("{}", args[0].as_any().downcast_ref::<StringValue>().expect("Failed to downcast to StringValue.").to_string());
[INFO] [stdout] 50 | |             io::stdout().flush().unwrap();
[INFO] [stdout] 51 | |         }
[INFO] [stdout] 52 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 47 ~     if args.len() == 1
[INFO] [stdout] 48 ~         && args[0].get_type() == ValueType::String {
[INFO] [stdout] 49 |             print!("{}", args[0].as_any().downcast_ref::<StringValue>().expect("Failed to downcast to StringValue.").to_string());
[INFO] [stdout] 50 |             io::stdout().flush().unwrap();
[INFO] [stdout] 51 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/eval/eval_statements.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     return Box::new(NullValue {});
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 29 -     return Box::new(NullValue {});
[INFO] [stdout] 29 +     Box::new(NullValue {})
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: equality checks against true are unnecessary
[INFO] [stdout]   --> src/eval/eval_statements.rs:58:11
[INFO] [stdout]    |
[INFO] [stdout] 58 |     while eval(while_stmt.condition.to_stmt_from_expr(), last_env).as_bool() == true {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `eval(while_stmt.condition.to_stmt_from_expr(), last_env).as_bool()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stdout]    = note: `#[warn(clippy::bool_comparison)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/eval/eval_statements.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |         if iterable.elements.len() == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `iterable.elements.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/eval/eval_expressions.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 |             number = rhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue").clone();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue")`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]   --> src/eval/eval_expressions.rs:30:22
[INFO] [stdout]    |
[INFO] [stdout] 30 |             number = lhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue").clone();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*lhs.as_any().downcast_ref::<NumberValue>().expect("Failed to downcast to NumberValue")`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `NumberValue` which implements the `Copy` trait
[INFO] [stdout]    --> src/eval/eval_expressions.rs:184:32
[INFO] [stdout]     |
[INFO] [stdout] 184 | ... = eval(member_expr.property.to_stmt_from_expr(), Arc::clone(&env)).as_any().downcast_ref::<NumberValue>().expect("Expected number when indexing list").clone();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*eval(member_expr.property.to_stmt_from_expr(), Arc::clone(&env)).as_any().downcast_ref::<NumberValue>().expect("Expected number when indexing list")`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/eval/eval_expressions.rs:223:5
[INFO] [stdout]     |
[INFO] [stdout] 223 |     return Box::new(object);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 223 -     return Box::new(object);
[INFO] [stdout] 223 +     Box::new(object)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing last element with `obj.elements.get(obj.elements.len() - 1)`
[INFO] [stdout]    --> src/eval/eval_expressions.rs:280:20
[INFO] [stdout]     |
[INFO] [stdout] 280 |             return obj.elements.get(obj.elements.len() - 1).unwrap().clone();
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `obj.elements.last()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_last_with_len
[INFO] [stdout]     = note: `#[warn(clippy::get_last_with_len)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "4cb04c9ef22c2cc6a3c807210e989628500079dff5a6a45e1d684cb44e63085e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cb04c9ef22c2cc6a3c807210e989628500079dff5a6a45e1d684cb44e63085e", kill_on_drop: false }`
[INFO] [stdout] 4cb04c9ef22c2cc6a3c807210e989628500079dff5a6a45e1d684cb44e63085e