[INFO] cloning repository https://github.com/ironbody/lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ironbody/lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fironbody%2Flox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fironbody%2Flox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 99a21c8c94bcffa5f6be0a738d8efcbb696f4b88
[INFO] checking ironbody/lox against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fironbody%2Flox" "/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/ironbody/lox
[INFO] finished tweaking git repo https://github.com/ironbody/lox
[INFO] tweaked toml for git repo https://github.com/ironbody/lox written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ironbody/lox on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ironbody/lox 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "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] 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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dae381443b742bc789c05bd3e3a34980c925c42f3fea37b3ae68cbec92f9849a
[INFO] running `Command { std: "docker" "start" "-a" "dae381443b742bc789c05bd3e3a34980c925c42f3fea37b3ae68cbec92f9849a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dae381443b742bc789c05bd3e3a34980c925c42f3fea37b3ae68cbec92f9849a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dae381443b742bc789c05bd3e3a34980c925c42f3fea37b3ae68cbec92f9849a", kill_on_drop: false }`
[INFO] [stdout] dae381443b742bc789c05bd3e3a34980c925c42f3fea37b3ae68cbec92f9849a
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e90a372f483a15595c37962538c1f775d3f1e0852ff553e23bd173c849738792
[INFO] running `Command { std: "docker" "start" "-a" "e90a372f483a15595c37962538c1f775d3f1e0852ff553e23bd173c849738792", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]     Checking thiserror v1.0.56
[INFO] [stderr]     Checking lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core::fmt`
[INFO] [stdout]  --> src/expr.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::fmt;
[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: `token::TokenType`
[INFO] [stdout]  --> src/interpreter.rs:1:62
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{expr::{Expr, ExpressionVisitor}, object::Object, token::TokenType};
[INFO] [stdout]   |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs` and `io`
[INFO] [stdout]   --> src/main.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{env, fs, io, process::exit};
[INFO] [stdout]    |                ^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenType`
[INFO] [stdout]   --> src/main.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 | use token::{Token, TokenType};
[INFO] [stdout]    |                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scanner::Scanner`
[INFO] [stdout]   --> src/main.rs:18:31
[INFO] [stdout]    |
[INFO] [stdout] 18 | use crate::{literal::Literal, scanner::Scanner};
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> src/interpreter.rs:16:28
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn visit_binary(&self, left: &crate::expr::Expr, operand: &crate::token::Token, right: &crate::expr::Expr) -> Result<Object, Interpre...
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operand`
[INFO] [stdout]   --> src/interpreter.rs:16:54
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn visit_binary(&self, left: &crate::expr::Expr, operand: &crate::token::Token, right: &crate::expr::Expr) -> Result<Object, Interpre...
[INFO] [stdout]    |                                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/interpreter.rs:16:85
[INFO] [stdout]    |
[INFO] [stdout] 16 | ...perand: &crate::token::Token, right: &crate::expr::Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operand`
[INFO] [stdout]   --> src/interpreter.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn visit_unary(&self, operand: &crate::token::Token, expr: &crate::expr::Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/interpreter.rs:20:58
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn visit_unary(&self, operand: &crate::token::Token, expr: &crate::expr::Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |                                                          ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_ast_printer` is never used
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn test_ast_printer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lox.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Scanner(Vec<ScannerError>),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 11 -     Scanner(Vec<ScannerError>),
[INFO] [stdout] 11 +     Scanner(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lox.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Parser(ParserError),
[INFO] [stdout]    |     ------ ^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 12 -     Parser(ParserError),
[INFO] [stdout] 12 +     Parser(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `error`, `report`, and `error_token` are never used
[INFO] [stdout]   --> src/lox.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Lox {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn error(&mut self, line: usize, message: &str) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn report(&mut self, line: usize, location: &str, message: &str) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn error_token(&mut self, token: &Token, message: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `message` and `token` are never read
[INFO] [stdout]  --> src/parser.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Custom { message: String, token: Token },
[INFO] [stdout]   |     ------   ^^^^^^^          ^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ParserError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `synchronize` is never used
[INFO] [stdout]    --> src/parser.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 204 |     fn synchronize(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Object` is never used
[INFO] [stdout]  --> src/object.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Object{
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InterpreterError` is never used
[INFO] [stdout]  --> src/interpreter.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum InterpreterError{
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Interpreter` is never constructed
[INFO] [stdout]  --> src/interpreter.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Interpreter;
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `evaluate` is never used
[INFO] [stdout]   --> src/interpreter.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Interpreter {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 10 |     fn evaluate(&self, expr: &Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lox.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         self.run(&content);
[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] 26 |         let _ = self.run(&content);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lox.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |                     self.run(&line);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 39 |                     let _ = self.run(&line);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt`
[INFO] [stdout]  --> src/expr.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::fmt;
[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: `token::TokenType`
[INFO] [stdout]  --> src/interpreter.rs:1:62
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{expr::{Expr, ExpressionVisitor}, object::Object, token::TokenType};
[INFO] [stdout]   |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs` and `io`
[INFO] [stdout]   --> src/main.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::{env, fs, io, process::exit};
[INFO] [stdout]    |                ^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenType`
[INFO] [stdout]   --> src/main.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 | use token::{Token, TokenType};
[INFO] [stdout]    |                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scanner::Scanner`
[INFO] [stdout]   --> src/main.rs:18:31
[INFO] [stdout]    |
[INFO] [stdout] 18 | use crate::{literal::Literal, scanner::Scanner};
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> src/interpreter.rs:16:28
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn visit_binary(&self, left: &crate::expr::Expr, operand: &crate::token::Token, right: &crate::expr::Expr) -> Result<Object, Interpre...
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operand`
[INFO] [stdout]   --> src/interpreter.rs:16:54
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn visit_binary(&self, left: &crate::expr::Expr, operand: &crate::token::Token, right: &crate::expr::Expr) -> Result<Object, Interpre...
[INFO] [stdout]    |                                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/interpreter.rs:16:85
[INFO] [stdout]    |
[INFO] [stdout] 16 | ...perand: &crate::token::Token, right: &crate::expr::Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operand`
[INFO] [stdout]   --> src/interpreter.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn visit_unary(&self, operand: &crate::token::Token, expr: &crate::expr::Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/interpreter.rs:20:58
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn visit_unary(&self, operand: &crate::token::Token, expr: &crate::expr::Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |                                                          ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_ast_printer` is never used
[INFO] [stdout]   --> src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn test_ast_printer() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lox.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Scanner(Vec<ScannerError>),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 11 -     Scanner(Vec<ScannerError>),
[INFO] [stdout] 11 +     Scanner(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lox.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Parser(ParserError),
[INFO] [stdout]    |     ------ ^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 12 -     Parser(ParserError),
[INFO] [stdout] 12 +     Parser(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `error`, `report`, and `error_token` are never used
[INFO] [stdout]   --> src/lox.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Lox {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn error(&mut self, line: usize, message: &str) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn report(&mut self, line: usize, location: &str, message: &str) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn error_token(&mut self, token: &Token, message: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `message` and `token` are never read
[INFO] [stdout]  --> src/parser.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Custom { message: String, token: Token },
[INFO] [stdout]   |     ------   ^^^^^^^          ^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ParserError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `synchronize` is never used
[INFO] [stdout]    --> src/parser.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 204 |     fn synchronize(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Object` is never used
[INFO] [stdout]  --> src/object.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Object{
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InterpreterError` is never used
[INFO] [stdout]  --> src/interpreter.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum InterpreterError{
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Interpreter` is never constructed
[INFO] [stdout]  --> src/interpreter.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Interpreter;
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `evaluate` is never used
[INFO] [stdout]   --> src/interpreter.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Interpreter {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 10 |     fn evaluate(&self, expr: &Expr) -> Result<Object, InterpreterError> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lox.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         self.run(&content);
[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] 26 |         let _ = self.run(&content);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lox.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |                     self.run(&line);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 39 |                     let _ = self.run(&line);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.38s
[INFO] running `Command { std: "docker" "inspect" "e90a372f483a15595c37962538c1f775d3f1e0852ff553e23bd173c849738792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e90a372f483a15595c37962538c1f775d3f1e0852ff553e23bd173c849738792", kill_on_drop: false }`
[INFO] [stdout] e90a372f483a15595c37962538c1f775d3f1e0852ff553e23bd173c849738792
