[INFO] cloning repository https://github.com/h3lio5/monkey-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/h3lio5/monkey-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3lio5%2Fmonkey-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3lio5%2Fmonkey-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d357cf6c09144b767ac0d58a2f854dd5e1d8d19
[INFO] checking h3lio5/monkey-rs against try#b28cc4eb48a6415b914e8ad0308be255ff8d73ed for pr-156508
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3lio5%2Fmonkey-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/h3lio5/monkey-rs
[INFO] finished tweaking git repo https://github.com/h3lio5/monkey-rs
[INFO] tweaked toml for git repo https://github.com/h3lio5/monkey-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/h3lio5/monkey-rs on toolchain b28cc4eb48a6415b914e8ad0308be255ff8d73ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/h3lio5/monkey-rs 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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking h3lio5/monkey-rs against try#b28cc4eb48a6415b914e8ad0308be255ff8d73ed for pr-156508
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3lio5%2Fmonkey-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/h3lio5/monkey-rs
[INFO] finished tweaking git repo https://github.com/h3lio5/monkey-rs
[INFO] tweaked toml for git repo https://github.com/h3lio5/monkey-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/h3lio5/monkey-rs on toolchain b28cc4eb48a6415b914e8ad0308be255ff8d73ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/h3lio5/monkey-rs 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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v2.0.9
[INFO] [stderr]   Downloaded proc-macro2 v1.0.92
[INFO] [stderr]   Downloaded thiserror v2.0.9
[INFO] [stderr]   Downloaded unicode-ident v1.0.14
[INFO] [stderr]   Downloaded syn v2.0.92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b37b908030abbb2df7c740d96bdf7dcff06ee718a08dd6354469a8864617c9f3
[INFO] running `Command { std: "docker" "start" "-a" "b37b908030abbb2df7c740d96bdf7dcff06ee718a08dd6354469a8864617c9f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b37b908030abbb2df7c740d96bdf7dcff06ee718a08dd6354469a8864617c9f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b37b908030abbb2df7c740d96bdf7dcff06ee718a08dd6354469a8864617c9f3", kill_on_drop: false }`
[INFO] [stdout] b37b908030abbb2df7c740d96bdf7dcff06ee718a08dd6354469a8864617c9f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a97b53669725d012c4025006b641ac1531c4f8afe4af4bf8b4d77d9b19181157
[INFO] running `Command { std: "docker" "start" "-a" "a97b53669725d012c4025006b641ac1531c4f8afe4af4bf8b4d77d9b19181157", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling thiserror v2.0.9
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.92
[INFO] [stderr]    Compiling thiserror-impl v2.0.9
[INFO] [stderr]     Checking monkeylang-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/ast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::token::Token`
[INFO] [stdout]  --> src/object/errors.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::object::Object`
[INFO] [stdout]  --> src/vm/errors.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::object::Object;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::OpenOptions`
[INFO] [stdout]  --> src/vm/opcode.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::OpenOptions;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/ast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ast::*`
[INFO] [stdout]  --> src/evaluator/tests.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::token::Token`
[INFO] [stdout]  --> src/evaluator/tests.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::token::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::token::Token`
[INFO] [stdout]  --> src/object/errors.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ast::*` and `lexer`
[INFO] [stdout]  --> src/parser/tests.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{ast::*, lexer};
[INFO] [stdout]   |             ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::object::Object`
[INFO] [stdout]  --> src/vm/errors.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::object::Object;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::OpenOptions`
[INFO] [stdout]  --> src/vm/opcode.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::OpenOptions;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::*`
[INFO] [stdout]  --> src/vm/tests.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{ast::*, compiler::*, lexer::*, parser::*};
[INFO] [stdout]   |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statement`
[INFO] [stdout]   --> src/compiler/mod.rs:46:41
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn compile_let_statement(&mut self, statement: LetStatement) {
[INFO] [stdout]    |                                         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statement`
[INFO] [stdout]   --> src/compiler/mod.rs:50:44
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn compile_return_statement(&mut self, statement: ReturnStatement) {
[INFO] [stdout]    |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lexer/mod.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let mut lexer = Lexer {
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statement`
[INFO] [stdout]   --> src/compiler/mod.rs:46:41
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn compile_let_statement(&mut self, statement: LetStatement) {
[INFO] [stdout]    |                                         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statement`
[INFO] [stdout]   --> src/compiler/mod.rs:50:44
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn compile_return_statement(&mut self, statement: ReturnStatement) {
[INFO] [stdout]    |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `evaluator::errors::EvalError` is more private than the item `Evaluator::eval_program`
[INFO] [stdout]   --> src/evaluator/mod.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn eval_program(&mut self, program: Program) -> EvalResult<Object> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `Evaluator::eval_program` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `evaluator::errors::EvalError` is only usable at visibility `pub(in crate::evaluator)`
[INFO] [stdout]   --> src/evaluator/errors.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | pub(super) enum EvalError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Program` is never used
[INFO] [stdout]  --> src/ast.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type Program = Vec<Statement>;
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Statement` is never used
[INFO] [stdout]  --> src/ast.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Statement {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LetStatement` is never constructed
[INFO] [stdout]   --> src/ast.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct LetStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ReturnStatement` is never constructed
[INFO] [stdout]   --> src/ast.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct ReturnStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExpressionStatement` is never constructed
[INFO] [stdout]   --> src/ast.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct ExpressionStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]   --> src/ast.rs:34:10
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub enum Expression {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrefixExpression` is never constructed
[INFO] [stdout]   --> src/ast.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct PrefixExpression {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InfixExpression` is never constructed
[INFO] [stdout]   --> src/ast.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct InfixExpression {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IfExpression` is never constructed
[INFO] [stdout]   --> src/ast.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct IfExpression {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockStatement` is never constructed
[INFO] [stdout]   --> src/ast.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub struct BlockStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayLiteral` is never constructed
[INFO] [stdout]   --> src/ast.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct ArrayLiteral {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IndexExpression` is never constructed
[INFO] [stdout]   --> src/ast.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub struct IndexExpression {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HashLiteral` is never constructed
[INFO] [stdout]   --> src/ast.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub struct HashLiteral {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FuncLiteral` is never constructed
[INFO] [stdout]   --> src/ast.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct FuncLiteral {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CallExpression` is never constructed
[INFO] [stdout]    --> src/ast.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 | pub struct CallExpression {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InfixType` is never used
[INFO] [stdout]    --> src/ast.rs:110:10
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub enum InfixType {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ByteCode` is never constructed
[INFO] [stdout]  --> src/compiler/mod.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct ByteCode {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Compiler` is never constructed
[INFO] [stdout]   --> src/compiler/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Compiler {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/compiler/mod.rs:19:12
[INFO] [stdout]     |
[INFO] [stdout]  18 | impl Compiler {
[INFO] [stdout]     | ------------- associated items in this implementation
[INFO] [stdout]  19 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  26 |     pub fn compile_program(&mut self, program: Program) -> Result<(), String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  34 |     fn compile_statement(&mut self, statement: Statement) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  46 |     fn compile_let_statement(&mut self, statement: LetStatement) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  50 |     fn compile_return_statement(&mut self, statement: ReturnStatement) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  54 |     fn compile_expr_statement(&mut self, expr: Expression) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  65 |     fn compile_integer_literal(&mut self, token: Token) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  78 |     fn compile_boolean_literal(&mut self, token: Token) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  86 |     fn compile_infix_expr(&mut self, expr: InfixExpression) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 |     fn add_constant(&mut self, obj: Object) -> i16 {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn emit(&mut self, opcode: OpCode, operands: Vec<i16>) -> i16 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     pub fn bytecode(&self) -> ByteCode {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Env` is never used
[INFO] [stdout]   --> src/evaluator/mod.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | type Env = Rc<RefCell<Environment>>;
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Evaluator` is never constructed
[INFO] [stdout]   --> src/evaluator/mod.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Evaluator {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/evaluator/mod.rs:26:12
[INFO] [stdout]     |
[INFO] [stdout]  25 | impl Evaluator {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout]  26 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  32 |     pub fn eval_program(&mut self, program: Program) -> EvalResult<Object> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  43 |     fn eval_statement(&mut self, statement: Statement) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  51 |     fn eval_let_statement(&mut self, stmt: LetStatement) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  62 |     fn eval_return_statement(&mut self, stmt: ReturnStatement) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  67 |     fn eval_expression(&mut self, expression: Expression) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  84 |     fn eval_boolean(&self, token: Token) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  94 |     fn eval_integer(&self, token: Token) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     fn eval_string(&self, token: Token) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     fn eval_identifier(&self, token: Token) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     fn eval_prefix_expression(&mut self, expr: PrefixExpression) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn eval_bang_prefix_expression(&self, right: Object) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     fn eval_minus_prefix_expression(&self, right: Object) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 151 |     fn eval_infix_expression(&mut self, expr: InfixExpression) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 174 |     fn eval_integer_infix_expression(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 199 |     fn eval_string_infix_expression(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 214 |     fn eval_boolean_infix_expression(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 231 |     fn eval_if_expression(&mut self, expr: IfExpression) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 243 |     fn eval_block_statement(&mut self, block: BlockStatement) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 254 |     fn eval_func_literal(&self, expr: FuncLiteral) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 |     fn eval_call_expression(&mut self, expr: CallExpression) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 276 |     fn eval_arguments(&mut self, arguments: Vec<Expression>) -> EvalResult<Vec<Object>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 283 |     fn execute_function(&mut self, func: FuncObject, args: Vec<Object>) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 297 |     fn eval_array_expression(&mut self, expr: ArrayLiteral) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 307 |     fn eval_index_expression(&mut self, expr: IndexExpression) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 330 |     fn eval_array_index_expression(&mut self, array: &[Object], index: &i64) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 337 |     fn eval_hash_expression(&mut self, expr: HashLiteral) -> EvalResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 348 |     fn is_truthy(&self, obj: &Object) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EvalError` is never used
[INFO] [stdout]  --> src/evaluator/errors.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(super) enum EvalError {
[INFO] [stdout]   |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `EvalResult` is never used
[INFO] [stdout]   --> src/evaluator/errors.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub(super) type EvalResult<T> = Result<T, EvalError>;
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]  --> src/lexer/mod.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Lexer<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lexer/mod.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let mut lexer = Lexer {
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lexer/mod.rs:16:12
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl<'a> Lexer<'a> {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout]  16 |     pub fn new(input: &'a str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  26 |     pub fn next_token(&mut self) -> Token {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  59 |     fn skip_whitespace(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  65 |     fn handle_equality(&mut self, token1: Token, token2: Token) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  74 |     fn read_number(&mut self, first_digit: char, sign: i64) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  91 |     fn handle_minus_or_negative_number(&mut self) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     fn read_identifier(&mut self, first_letter: char) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn read_string(&mut self) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Object` is never used
[INFO] [stdout]   --> src/object/mod.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Object {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FuncObject` is never constructed
[INFO] [stdout]   --> src/object/mod.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub(crate) struct FuncObject {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Environment` is never constructed
[INFO] [stdout]  --> src/object/environment.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Environment {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `new_enclosed`, `set`, and `get` are never used
[INFO] [stdout]   --> src/object/environment.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Environment {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn new_enclosed(outer: Rc<RefCell<Environment>>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn set(&mut self, key: &str, value: Object) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn get(&self, key: &str) -> Result<Object, EnvironmentErrors> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EnvironmentErrors` is never used
[INFO] [stdout]  --> src/object/errors.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum EnvironmentErrors {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Precedence` is never used
[INFO] [stdout]   --> src/parser/mod.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub(self) enum Precedence {
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser/mod.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Parser<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/parser/mod.rs:33:12
[INFO] [stdout]     |
[INFO] [stdout]  31 | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout]  32 |     /// Creates a new Parser instance
[INFO] [stdout]  33 |     pub fn new(lexer: Lexer<'a>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  45 |     pub fn parse_program(&mut self) -> Result<Program, ParseError> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  55 |     fn parse_statement(&mut self) -> Result<Statement, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  63 |     fn parse_let_statement(&mut self) -> Result<Statement, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  77 |     fn parse_return_statement(&mut self) -> Result<Statement, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  85 |     fn parse_expression_statement(&mut self) -> Result<Statement, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  97 |     fn parse_expression(&mut self, precedence: Precedence) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     fn parse_prefix_expression(&mut self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 145 |     fn parse_integer_literal_expression(&self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |     fn parse_string_literal_expression(&self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 155 |     fn parse_boolean_literal_expression(&self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 160 |     fn parse_identifier_expression(&self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 165 |     fn parse_infix_expression(&mut self, left: Expression) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn parse_function_literal_expression(&mut self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 197 |     fn parse_function_parameters(&mut self) -> Result<Vec<Token>, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 218 |     fn parse_block_statement(&mut self) -> Result<BlockStatement, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 237 |     fn parse_call_expression(&mut self, function: Expression) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 248 |     fn parse_array_literal_expression(&mut self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 254 |     fn parse_list_expression(&mut self, end: Token) -> Result<Vec<Expression>, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 273 |     fn parse_hash_literal_expression(&mut self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 299 |     fn parse_index_expression(&mut self, left: Expression) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 311 |     fn parse_grouped_expression(&mut self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 318 |     fn parse_if_expression(&mut self) -> Result<Expression, ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 344 |     fn advance(&mut self) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 349 |     fn expect_next(&mut self, token: Token) -> Result<(), ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 357 |     fn expect_now(&self, token: Token) -> Result<(), ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 366 |     fn is_current_token(&self, token: Token) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 371 |     fn is_peek_token(&self, token: Token) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 376 |     fn is_ident_token(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 380 |     fn expect_peek(&mut self, token: Token) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 393 |     fn raise_token_mismatch_error(&self, expected: Token, found: Token) -> Result<(), ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 398 |     fn token_precedence(&self, token: &Token) -> Precedence {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 414 |     fn peek_token_precedence(&self) -> Precedence {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 419 |     fn current_token_precedence(&self) -> Precedence {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 423 |     fn has_infix_parse_function(&self, token: &Token) -> InfixType {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 441 |     fn collect_identifier(&mut self, identifiers: &mut Vec<Token>) -> Result<(), ParseError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ParseError` is never used
[INFO] [stdout]  --> src/parser/errors.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum ParseError {
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Token` is never used
[INFO] [stdout]  --> src/token.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `get_keyword_or_identifier` is never used
[INFO] [stdout]   --> src/token.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl Token {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 49 |     pub fn get_keyword_or_identifier(identifier: &str) -> Token {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STACK_SIZE` is never used
[INFO] [stdout]   --> src/vm/mod.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const STACK_SIZE: usize = 2048;
[INFO] [stdout]    |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Vm` is never constructed
[INFO] [stdout]   --> src/vm/mod.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Vm {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/vm/mod.rs:23:8
[INFO] [stdout]     |
[INFO] [stdout]  22 | impl Vm {
[INFO] [stdout]     | ------- associated items in this implementation
[INFO] [stdout]  23 |     fn new(bytecode: ByteCode) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  35 |     fn run(&mut self) -> VmResult<()> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  58 |     fn handle_constant_opcode(&mut self, ip: &mut usize) -> VmResult<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  76 |     fn handle_binary_opcode(&mut self, opcode: OpCode, ip: &mut usize) -> VmResult<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  94 |     fn handle_comparision_opcode(&mut self, opcode: OpCode, ip: &mut usize) -> VmResult<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn execute_integer_comparision_op(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |     fn execute_binary_integer_op(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn handle_pop_opcode(&mut self, ip: &mut usize) -> VmResult<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |     fn handle_bool_opcode(&mut self, opcode: OpCode, ip: &mut usize) -> VmResult<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 169 |     fn stack_push(&mut self, obj: Object) -> VmResult<()> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn stack_pop(&mut self) -> VmResult<Object> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |     fn last_popped_stack_element(&self) -> Option<Object> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `VmError` is never used
[INFO] [stdout]  --> src/vm/errors.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum VmError {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `VmResult` is never used
[INFO] [stdout]   --> src/vm/errors.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(super) type VmResult<T> = Result<T, VmError>;
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `opcode_encode` is never used
[INFO] [stdout]   --> src/vm/opcode.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn opcode_encode(opcode: OpCode, operands: Vec<i16>) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser/tests.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut program = parser.parse_program();
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser/tests.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let mut program = parser.parse_program();
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parser/tests.rs:490:9
[INFO] [stdout]     |
[INFO] [stdout] 490 |     let mut program = parser.parse_program();
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> src/vm/tests.rs:60:10
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let (vm, run_result) = test_helper_parse_input("1 / 0");
[INFO] [stdout]    |          ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> src/vm/tests.rs:84:10
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let (vm, vm_run_result) = test_helper_parse_input("true < false");
[INFO] [stdout]    |          ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> src/vm/tests.rs:87:10
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let (vm, vm_run_result) = test_helper_parse_input("true < 2");
[INFO] [stdout]    |          ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `evaluator::errors::EvalError` is more private than the item `Evaluator::eval_program`
[INFO] [stdout]   --> src/evaluator/mod.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn eval_program(&mut self, program: Program) -> EvalResult<Object> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `Evaluator::eval_program` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `evaluator::errors::EvalError` is only usable at visibility `pub(in crate::evaluator)`
[INFO] [stdout]   --> src/evaluator/errors.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | pub(super) enum EvalError {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `input` and `line_number` are never read
[INFO] [stdout]   --> src/lexer/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Lexer<'a> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 10 |     input: &'a str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     cursor: Peekable<Chars<'a>>,
[INFO] [stdout] 12 |     line_number: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Lexer` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ParseError` and `ParseExpressionError` are never constructed
[INFO] [stdout]   --> src/parser/errors.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub enum ParseError {
[INFO] [stdout]    |          ---------- variants in this enum
[INFO] [stdout]  7 |     #[error("parsing error")]
[INFO] [stdout]  8 |     ParseError,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     ParseExpressionError { expression: String },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/vm/tests.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     compiler.compile_program(program);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let _ = compiler.compile_program(program);
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.00s
[INFO] running `Command { std: "docker" "inspect" "a97b53669725d012c4025006b641ac1531c4f8afe4af4bf8b4d77d9b19181157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a97b53669725d012c4025006b641ac1531c4f8afe4af4bf8b4d77d9b19181157", kill_on_drop: false }`
[INFO] [stdout] a97b53669725d012c4025006b641ac1531c4f8afe4af4bf8b4d77d9b19181157
