[INFO] cloning repository https://github.com/Delioos/crafting-interpreters
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Delioos/crafting-interpreters" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelioos%2Fcrafting-interpreters", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelioos%2Fcrafting-interpreters'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f23064cee23579b08c6f1786f112609c2b81adb4
[INFO] checking Delioos/crafting-interpreters against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelioos%2Fcrafting-interpreters" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Delioos/crafting-interpreters
[INFO] finished tweaking git repo https://github.com/Delioos/crafting-interpreters
[INFO] tweaked toml for git repo https://github.com/Delioos/crafting-interpreters written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Delioos/crafting-interpreters 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/Delioos/crafting-interpreters 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 00c5ad1e445a0f1ec88c133518e40242fb3fe5125ce211760ccd52806f76648b
[INFO] running `Command { std: "docker" "start" "-a" "00c5ad1e445a0f1ec88c133518e40242fb3fe5125ce211760ccd52806f76648b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00c5ad1e445a0f1ec88c133518e40242fb3fe5125ce211760ccd52806f76648b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00c5ad1e445a0f1ec88c133518e40242fb3fe5125ce211760ccd52806f76648b", kill_on_drop: false }`
[INFO] [stdout] 00c5ad1e445a0f1ec88c133518e40242fb3fe5125ce211760ccd52806f76648b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ce2f4eb931ad845b4b7ca2d672f24b626395c8391e13235ff8adf187139ff30f
[INFO] running `Command { std: "docker" "start" "-a" "ce2f4eb931ad845b4b7ca2d672f24b626395c8391e13235ff8adf187139ff30f", kill_on_drop: false }`
[INFO] [stderr]     Checking tracing-core v0.1.33
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking thiserror v2.0.12
[INFO] [stderr]     Checking crafting-interpreters v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `process::ExitCode`
[INFO] [stdout]  --> src/lox/lox.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     process::ExitCode,
[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: `tracing_subscriber::reload::Error`
[INFO] [stdout]   --> src/lox/lox.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tracing_subscriber::reload::Error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ScanningError`
[INFO] [stdout]  --> src/lox/scanner.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ScanningError, TokenType,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tracing::error`
[INFO] [stdout]   --> src/lox/scanner.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tracing::error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/lox/token.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scanner::*`
[INFO] [stdout]  --> src/lox/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use scanner::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `process::ExitCode`
[INFO] [stdout]  --> src/lox/lox.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     process::ExitCode,
[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: `tracing_subscriber::reload::Error`
[INFO] [stdout]   --> src/lox/lox.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tracing_subscriber::reload::Error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ScanningError`
[INFO] [stdout]  --> src/lox/scanner.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ScanningError, TokenType,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tracing::error`
[INFO] [stdout]   --> src/lox/scanner.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tracing::error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/lox/token.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scanner::*`
[INFO] [stdout]  --> src/lox/mod.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use scanner::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lox/lox.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let mut lox = Lox { had_error: false };
[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: variable `lox` is assigned to, but never used
[INFO] [stdout]   --> src/lox/lox.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let mut lox = Lox { had_error: false };
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_lox` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `lox` is never read
[INFO] [stdout]   --> src/lox/lox.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         lox.had_error = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ILinkedList` is never used
[INFO] [stdout]  --> src/challenges/chall_one.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | trait ILinkedList {
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/challenges/chall_one.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Node<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]   --> src/challenges/chall_one.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct LinkedList {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/challenges/chall_one.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl<T> Node<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 33 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/challenges/chall_one.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl LinkedList {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 43 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TokenError` is never used
[INFO] [stdout]   --> src/lox/scanner.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum TokenError {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]   --> src/lox/scanner.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Scanner {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lox/scanner.rs:30:8
[INFO] [stdout]     |
[INFO] [stdout]  29 | impl Scanner {
[INFO] [stdout]     | ------------ associated items in this implementation
[INFO] [stdout]  30 |     fn new(source: String) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  62 |     fn is_finished(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  66 |     fn is_alpha(&self, c: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  70 |     fn peek(&self) -> char {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  77 |     fn peek_next(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  85 |     fn add_token(&mut self, nature: TokenType) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  90 |     fn add_token_with_literal(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn match_next(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |     fn advance(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     fn string(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 155 |     fn number(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 185 |     fn comment_block(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 203 |     fn identifier(&mut self) -> TokenType {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 222 |     fn scan_token(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 327 |     fn scan_tokens(&mut self) -> Vec<Token> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]   --> src/lox/token.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     line: u64,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has a derived impl for the trait `Clone`, 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/lox/scanner.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         self.add_token_with_literal(nature, Literal::None);
[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] 86 |         let _ = self.add_token_with_literal(nature, Literal::None);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lox/scanner.rs:286:21
[INFO] [stdout]     |
[INFO] [stdout] 286 |                     self.comment_block();
[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] 286 |                     let _ = self.comment_block();
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lox/lox.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let mut lox = Lox { had_error: false };
[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: variable `lox` is assigned to, but never used
[INFO] [stdout]   --> src/lox/lox.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let mut lox = Lox { had_error: false };
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_lox` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `lox` is never read
[INFO] [stdout]   --> src/lox/lox.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         lox.had_error = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/challenges/chall_one.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | trait ILinkedList {
[INFO] [stdout]   |       ----------- associated function in this trait
[INFO] [stdout] 9 |     fn new() -> Self;
[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 `prev` is never read
[INFO] [stdout]   --> src/challenges/chall_one.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Node<T> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 22 |     prev: Option<Box<Node<T>>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TokenError` is never used
[INFO] [stdout]   --> src/lox/scanner.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum TokenError {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]   --> src/lox/scanner.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Scanner {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lox/scanner.rs:30:8
[INFO] [stdout]     |
[INFO] [stdout]  29 | impl Scanner {
[INFO] [stdout]     | ------------ associated items in this implementation
[INFO] [stdout]  30 |     fn new(source: String) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  62 |     fn is_finished(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  66 |     fn is_alpha(&self, c: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  70 |     fn peek(&self) -> char {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  77 |     fn peek_next(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  85 |     fn add_token(&mut self, nature: TokenType) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  90 |     fn add_token_with_literal(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn match_next(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |     fn advance(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     fn string(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 155 |     fn number(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 185 |     fn comment_block(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 203 |     fn identifier(&mut self) -> TokenType {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 222 |     fn scan_token(&mut self) -> Result<(), TokenError> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 327 |     fn scan_tokens(&mut self) -> Vec<Token> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]   --> src/lox/token.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     line: u64,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has a derived impl for the trait `Clone`, 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/lox/scanner.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         self.add_token_with_literal(nature, Literal::None);
[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] 86 |         let _ = self.add_token_with_literal(nature, Literal::None);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lox/scanner.rs:286:21
[INFO] [stdout]     |
[INFO] [stdout] 286 |                     self.comment_block();
[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] 286 |                     let _ = self.comment_block();
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LevelFilter`, `instrument::WithSubscriber`, and `self`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     instrument::WithSubscriber,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     level_filters::{self, LevelFilter},
[INFO] [stdout]   |                     ^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.49s
[INFO] [stdout] warning: unused imports: `LevelFilter`, `instrument::WithSubscriber`, and `self`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     instrument::WithSubscriber,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     level_filters::{self, LevelFilter},
[INFO] [stdout]   |                     ^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ce2f4eb931ad845b4b7ca2d672f24b626395c8391e13235ff8adf187139ff30f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce2f4eb931ad845b4b7ca2d672f24b626395c8391e13235ff8adf187139ff30f", kill_on_drop: false }`
[INFO] [stdout] ce2f4eb931ad845b4b7ca2d672f24b626395c8391e13235ff8adf187139ff30f
