[INFO] cloning repository https://github.com/sethwalker/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sethwalker/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsethwalker%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsethwalker%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 006c6877dd147bb3592040025631a70bdb2d0260
[INFO] building sethwalker/rlox against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsethwalker%2Frlox" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sethwalker/rlox on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sethwalker/rlox
[INFO] finished tweaking git repo https://github.com/sethwalker/rlox
[INFO] tweaked toml for git repo https://github.com/sethwalker/rlox written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sethwalker/rlox 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b35628df72b623e48a2fd5a112dbbacbe1de817879f94580c9879fb84b5f2b0
[INFO] running `Command { std: "docker" "start" "-a" "1b35628df72b623e48a2fd5a112dbbacbe1de817879f94580c9879fb84b5f2b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b35628df72b623e48a2fd5a112dbbacbe1de817879f94580c9879fb84b5f2b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b35628df72b623e48a2fd5a112dbbacbe1de817879f94580c9879fb84b5f2b0", kill_on_drop: false }`
[INFO] [stdout] 1b35628df72b623e48a2fd5a112dbbacbe1de817879f94580c9879fb84b5f2b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 058f3511fab4ea8886a2c5e83c13eaaee2dcf97e09d8bd31862065fefb130a03
[INFO] running `Command { std: "docker" "start" "-a" "058f3511fab4ea8886a2c5e83c13eaaee2dcf97e09d8bd31862065fefb130a03", kill_on_drop: false }`
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stdin`
[INFO] [stdout]   --> src/bin/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let stdin = io::stdin();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `report` is never used
[INFO] [stdout]   --> src/bin/../lox/lib.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Lox {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn report(line: u32, whilst: String, message: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Visitor` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:4:19
[INFO] [stdout]    |
[INFO] [stdout] 4  |           pub trait Visitor<T> {
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 | / define_ast!(
[INFO] [stdout] 52 | |     Expr,
[INFO] [stdout] 53 | |     (
[INFO] [stdout] 54 | |         Binary,
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout] 60 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     Expr,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Binary` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         Binary,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:24:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |           impl $class_name {
[INFO] [stdout]    |           ---------------- associated function in this implementation
[INFO] [stdout] 24 |               pub fn new($($field_name: $field_type),*) -> Self {
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 | / define_ast!(
[INFO] [stdout] 52 | |     Expr,
[INFO] [stdout] 53 | |     (
[INFO] [stdout] 54 | |         Binary,
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout] 60 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Grouping` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:57:6
[INFO] [stdout]    |
[INFO] [stdout] 57 |     (Grouping, expression: Box<Expr>),
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Literal` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 |     (Literal, value: Object),
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unary` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:59:6
[INFO] [stdout]    |
[INFO] [stdout] 59 |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:33:20
[INFO] [stdout]    |
[INFO] [stdout] 32 |           impl $base_name {
[INFO] [stdout]    |           --------------- method in this implementation
[INFO] [stdout] 33 |               pub fn accept<T>(&self, visitor: &mut dyn Visitor<T>) -> T {
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 | / define_ast!(
[INFO] [stdout] 52 | |     Expr,
[INFO] [stdout] 53 | |     (
[INFO] [stdout] 54 | |         Binary,
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout] 60 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Str(String),
[INFO] [stdout]    |     --- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 56 |     Str(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     Num(f64),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 57 |     Num(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Identifier` and `Keyword` are never constructed
[INFO] [stdout]   --> src/bin/../lox/token.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub enum Object {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 58 |     Identifier(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 59 |     Keyword(String),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub line: u32,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` 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 variable: `line`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lox` is never constructed
[INFO] [stdout]  --> src/bin/../lox/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Lox {}
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Lox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `run`, `report`, and `error` are never used
[INFO] [stdout]   --> src/bin/../lox/lib.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Lox {
[INFO] [stdout]    | -------- associated functions in this implementation
[INFO] [stdout] 12 |     pub fn run(source: &str) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn report(line: u32, whilst: String, message: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]  --> src/bin/../lox/scanner.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Scanner {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Scanner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/bin/../lox/scanner.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout] 17  | impl Scanner {
[INFO] [stdout]     | ------------ associated items in this implementation
[INFO] [stdout] 18  |     pub fn new(source: &str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49  |     fn is_at_end(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53  |     pub fn scan_tokens(&mut self) -> &Vec<Token> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69  |     fn scan_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 143 |     fn identifier(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 164 |     fn is_alphanumeric(&self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     fn is_alpha(&self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn is_digit(&self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 176 |     fn number(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |     fn string(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |     fn peek(&self) -> char {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 242 |     fn peek_next(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 249 |     fn match_char(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 261 |     fn advance(&mut self) -> char {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 268 |     fn add_token(&mut self, ttype: TokenType, literal: Option<Object>) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/bin/../lox/token.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum TokenType {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 5  |     // Single-character tokens.
[INFO] [stdout] 6  |     LeftParen,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 7  |     RightParen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     LeftBrace,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 9  |     RightBrace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     Comma,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 12 |     Minus,
[INFO] [stdout] 13 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     Semicolon,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 15 |     Slash,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     Bang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 20 |     BangEqual,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 21 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     EqualEqual,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 23 |     Greater,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     GreaterEqual,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 25 |     Less,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 26 |     LessEqual,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     Identifier,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 30 |     String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 31 |     Number,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     And,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 35 |     Class,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Else,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 37 |     False,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 38 |     Fun,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 39 |     For,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     If,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 41 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 42 |     Or,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 43 |     Print,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 44 |     Return,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 45 |     Super,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 46 |     This,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 47 |     True,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 48 |     Var,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 49 |     While,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 50 |
[INFO] [stdout] 51 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` 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: variants `Str`, `Identifier`, and `Keyword` are never constructed
[INFO] [stdout]   --> src/bin/../lox/token.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub enum Object {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] 56 |     Str(String),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 57 |     Num(f64),
[INFO] [stdout] 58 |     Identifier(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 59 |     Keyword(String),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub line: u32,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "058f3511fab4ea8886a2c5e83c13eaaee2dcf97e09d8bd31862065fefb130a03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "058f3511fab4ea8886a2c5e83c13eaaee2dcf97e09d8bd31862065fefb130a03", kill_on_drop: false }`
[INFO] [stdout] 058f3511fab4ea8886a2c5e83c13eaaee2dcf97e09d8bd31862065fefb130a03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36e419f17fda2f753442fce4b3f36d2a30fe1149ca7e7b829276dee80c391add
[INFO] running `Command { std: "docker" "start" "-a" "36e419f17fda2f753442fce4b3f36d2a30fe1149ca7e7b829276dee80c391add", kill_on_drop: false }`
[INFO] [stderr]    Compiling rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lox` is never constructed
[INFO] [stdout]  --> src/bin/../lox/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Lox {}
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Lox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `run`, `report`, and `error` are never used
[INFO] [stdout]   --> src/bin/../lox/lib.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Lox {
[INFO] [stdout]    | -------- associated functions in this implementation
[INFO] [stdout] 12 |     pub fn run(source: &str) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn report(line: u32, whilst: String, message: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]  --> src/bin/../lox/scanner.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Scanner {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Scanner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/bin/../lox/scanner.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout] 17  | impl Scanner {
[INFO] [stdout]     | ------------ associated items in this implementation
[INFO] [stdout] 18  |     pub fn new(source: &str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49  |     fn is_at_end(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53  |     pub fn scan_tokens(&mut self) -> &Vec<Token> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69  |     fn scan_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 143 |     fn identifier(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 164 |     fn is_alphanumeric(&self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     fn is_alpha(&self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn is_digit(&self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 176 |     fn number(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 211 |     fn string(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |     fn peek(&self) -> char {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 242 |     fn peek_next(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 249 |     fn match_char(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 261 |     fn advance(&mut self) -> char {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 268 |     fn add_token(&mut self, ttype: TokenType, literal: Option<Object>) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/bin/../lox/token.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum TokenType {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 5  |     // Single-character tokens.
[INFO] [stdout] 6  |     LeftParen,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 7  |     RightParen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     LeftBrace,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 9  |     RightBrace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 10 |     Comma,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 12 |     Minus,
[INFO] [stdout] 13 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     Semicolon,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 15 |     Slash,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     Bang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 20 |     BangEqual,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 21 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     EqualEqual,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 23 |     Greater,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     GreaterEqual,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 25 |     Less,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 26 |     LessEqual,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     Identifier,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 30 |     String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 31 |     Number,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     And,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 35 |     Class,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Else,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 37 |     False,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 38 |     Fun,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 39 |     For,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     If,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 41 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 42 |     Or,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 43 |     Print,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 44 |     Return,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 45 |     Super,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 46 |     This,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 47 |     True,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 48 |     Var,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 49 |     While,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 50 |
[INFO] [stdout] 51 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` 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: variants `Str`, `Identifier`, and `Keyword` are never constructed
[INFO] [stdout]   --> src/bin/../lox/token.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub enum Object {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] 56 |     Str(String),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 57 |     Num(f64),
[INFO] [stdout] 58 |     Identifier(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 59 |     Keyword(String),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` 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 variable: `line`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/bin/../lox/lib.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn error(line: u32, message: String) {
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub line: u32,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` 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 variable: `stdin`
[INFO] [stdout]   --> src/bin/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let stdin = io::stdin();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `report` is never used
[INFO] [stdout]   --> src/bin/../lox/lib.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Lox {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn report(line: u32, whilst: String, message: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Visitor` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:4:19
[INFO] [stdout]    |
[INFO] [stdout] 4  |           pub trait Visitor<T> {
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 | / define_ast!(
[INFO] [stdout] 52 | |     Expr,
[INFO] [stdout] 53 | |     (
[INFO] [stdout] 54 | |         Binary,
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout] 60 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     Expr,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Binary` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         Binary,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:24:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |           impl $class_name {
[INFO] [stdout]    |           ---------------- associated function in this implementation
[INFO] [stdout] 24 |               pub fn new($($field_name: $field_type),*) -> Self {
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 | / define_ast!(
[INFO] [stdout] 52 | |     Expr,
[INFO] [stdout] 53 | |     (
[INFO] [stdout] 54 | |         Binary,
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout] 60 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Grouping` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:57:6
[INFO] [stdout]    |
[INFO] [stdout] 57 |     (Grouping, expression: Box<Expr>),
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Literal` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:58:6
[INFO] [stdout]    |
[INFO] [stdout] 58 |     (Literal, value: Object),
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unary` is never constructed
[INFO] [stdout]   --> src/bin/../lox/expr.rs:59:6
[INFO] [stdout]    |
[INFO] [stdout] 59 |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/bin/../lox/expr.rs:33:20
[INFO] [stdout]    |
[INFO] [stdout] 32 |           impl $base_name {
[INFO] [stdout]    |           --------------- method in this implementation
[INFO] [stdout] 33 |               pub fn accept<T>(&self, visitor: &mut dyn Visitor<T>) -> T {
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 | / define_ast!(
[INFO] [stdout] 52 | |     Expr,
[INFO] [stdout] 53 | |     (
[INFO] [stdout] 54 | |         Binary,
[INFO] [stdout] ...  |
[INFO] [stdout] 59 | |     (Unary, operator: Token, right: Box<Expr>)
[INFO] [stdout] 60 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Str(String),
[INFO] [stdout]    |     --- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 56 |     Str(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     Num(f64),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 57 |     Num(()),
[INFO] [stdout]    |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Identifier` and `Keyword` are never constructed
[INFO] [stdout]   --> src/bin/../lox/token.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub enum Object {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 58 |     Identifier(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 59 |     Keyword(String),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Object` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]   --> src/bin/../lox/token.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub line: u32,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "36e419f17fda2f753442fce4b3f36d2a30fe1149ca7e7b829276dee80c391add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36e419f17fda2f753442fce4b3f36d2a30fe1149ca7e7b829276dee80c391add", kill_on_drop: false }`
[INFO] [stdout] 36e419f17fda2f753442fce4b3f36d2a30fe1149ca7e7b829276dee80c391add