[INFO] cloning repository https://github.com/AbooMinister25/alpaca
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AbooMinister25/alpaca" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbooMinister25%2Falpaca", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbooMinister25%2Falpaca'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3bad7b08c7dd003eda8a154fa31d655af78ad13d
[INFO] checking AbooMinister25/alpaca against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbooMinister25%2Falpaca" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AbooMinister25/alpaca
[INFO] finished tweaking git repo https://github.com/AbooMinister25/alpaca
[INFO] tweaked toml for git repo https://github.com/AbooMinister25/alpaca written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AbooMinister25/alpaca on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AbooMinister25/alpaca 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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 029b155767759e37e64725f90a014143e387ffe29825e2865bc7b1402f8d4cc1
[INFO] running `Command { std: "docker" "start" "-a" "029b155767759e37e64725f90a014143e387ffe29825e2865bc7b1402f8d4cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "029b155767759e37e64725f90a014143e387ffe29825e2865bc7b1402f8d4cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "029b155767759e37e64725f90a014143e387ffe29825e2865bc7b1402f8d4cc1", kill_on_drop: false }`
[INFO] [stdout] 029b155767759e37e64725f90a014143e387ffe29825e2865bc7b1402f8d4cc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab8eb300bdbf760ef98a268f5675e2607338c3a914b0a00df390a60b9b984fc4
[INFO] running `Command { std: "docker" "start" "-a" "ab8eb300bdbf760ef98a268f5675e2607338c3a914b0a00df390a60b9b984fc4", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.2.6
[INFO] [stderr]     Checking alpaca v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Annotation` and `Statement`
[INFO] [stdout]  --> src/parser/expression.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::parser::ast::{Annotation, Expr, Statement};
[INFO] [stdout]   |                          ^^^^^^^^^^        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tokens::TokenKind`
[INFO] [stdout]  --> src/parser/statement.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::tokens::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Annotation` and `Statement`
[INFO] [stdout]  --> src/parser/expression.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::parser::ast::{Annotation, Expr, Statement};
[INFO] [stdout]   |                          ^^^^^^^^^^        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::tokens::TokenKind`
[INFO] [stdout]  --> src/parser/statement.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::tokens::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]    --> src/parser/expression.rs:118:25
[INFO] [stdout]     |
[INFO] [stdout] 118 |             expressions.push(todo!());
[INFO] [stdout]     |                         ^^^^ ------- any code following this expression is unreachable
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         unreachable call
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lhs`
[INFO] [stdout]   --> src/parser/expression.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let mut lhs = self.prefix_rule(token)?;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_lhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]   --> src/parser/expression.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn parse_expression(&mut self, precedence: u8) -> ExprResult {
[INFO] [stdout]    |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser/expression.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let mut lhs = self.prefix_rule(token)?;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]    --> src/parser/expression.rs:118:25
[INFO] [stdout]     |
[INFO] [stdout] 118 |             expressions.push(todo!());
[INFO] [stdout]     |                         ^^^^ ------- any code following this expression is unreachable
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         unreachable call
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `peeked`
[INFO] [stdout]   --> src/parser/statement.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let peeked = self.peek();
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_peeked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ErrorKind` is never used
[INFO] [stdout]   --> src/parser/mod.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub enum ErrorKind {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParserError` is never constructed
[INFO] [stdout]   --> src/parser/mod.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct ParserError {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `with_help` are never used
[INFO] [stdout]   --> src/parser/mod.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl ParserError {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 34 |     pub fn new(kind: ErrorKind, help: Option<String>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn with_help(self, help: String) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser/mod.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct Parser<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `advance`, `peek`, `at_end`, `consume`, and `synchronize` are never used
[INFO] [stdout]    --> src/parser/mod.rs:56:12
[INFO] [stdout]     |
[INFO] [stdout] 55  | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] 56  |     pub fn new(source: &'a str, filename: &'a str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 66  |     fn advance(&mut self) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     fn peek(&mut self) -> &Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     fn at_end(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |     fn consume(&mut self, expected: &TokenKind) -> Result<(), ParserError> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn synchronize(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LiteralKind` is never used
[INFO] [stdout]  --> src/parser/ast.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum LiteralKind {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Annotation` is never used
[INFO] [stdout]   --> src/parser/ast.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub enum Annotation {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/parser/ast.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub enum Expr {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Statement` is never used
[INFO] [stdout]   --> src/parser/ast.rs:93:10
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub enum Statement {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ExprResult` is never used
[INFO] [stdout]  --> src/parser/expression.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | type ExprResult = Result<Spanned<Expr>, ParserError>;
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/parser/expression.rs:12:12
[INFO] [stdout]     |
[INFO] [stdout] 10  | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- methods in this implementation
[INFO] [stdout] 11  |     /// Parses an expression.
[INFO] [stdout] 12  |     pub fn parse_expression(&mut self, precedence: u8) -> ExprResult {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18  |     fn prefix_rule(&mut self, token: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32  |     fn parse_literal(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45  |     fn parse_grouping(&mut self) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58  |     fn parse_tuple(&mut self, first: Spanned<Expr>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     fn parse_unary(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93  |     fn parse_array(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn parse_block(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `StatementResult` is never used
[INFO] [stdout]  --> src/parser/statement.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type StatementResult = Result<Spanned<Statement>, ParserError>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `parse_statement`, `parse_return`, `parse_let`, `parse_annotation`, and `parse_annotation_from` are never used
[INFO] [stdout]   --> src/parser/statement.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl<'a> Parser<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 9  |     /// Parses a statement.
[INFO] [stdout] 10 |     pub fn parse_statement(&mut self) -> StatementResult {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn parse_return(&mut self) -> StatementResult {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn parse_let(&mut self) -> StatementResult {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn parse_annotation(&mut self) -> Result<Spanned<Annotation>, ParserError> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn parse_annotation_from(&self, expr: &Expr) -> Result<Annotation, ParserError> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_keyword` is never used
[INFO] [stdout]   --> src/lexer.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn get_keyword(name: &str) -> TokenKind {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]   --> src/lexer.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct Lexer<'a> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lexer.rs:45:12
[INFO] [stdout]     |
[INFO] [stdout] 44  | impl<'a> Lexer<'a> {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout] 45  |     pub fn new(source: &'a str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54  |     fn advance(&mut self) -> Option<char> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59  |     fn peek(&mut self) -> Option<&char> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63  |     fn consume(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74  |     pub fn at_end(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78  |     fn create_token(&mut self, kind: TokenKind, len: usize) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82  |     fn lex_string(&mut self) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |     fn lex_number(&mut self, first_char: char) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn lex_identifier(&mut self, first_char: char) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 126 |     pub fn next_token(&mut self) -> Spanned<TokenKind> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Spanned` is never used
[INFO] [stdout]  --> src/span.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type Spanned<T> = (T, Span);
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Span` is never constructed
[INFO] [stdout]  --> src/span.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Span {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TokenKind` is never used
[INFO] [stdout]  --> src/tokens.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum TokenKind {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lhs`
[INFO] [stdout]   --> src/parser/expression.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let mut lhs = self.prefix_rule(token)?;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_lhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]   --> src/parser/expression.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn parse_expression(&mut self, precedence: u8) -> ExprResult {
[INFO] [stdout]    |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parser/expression.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let mut lhs = self.prefix_rule(token)?;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `peeked`
[INFO] [stdout]   --> src/parser/statement.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let peeked = self.peek();
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_peeked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ErrorKind` is never used
[INFO] [stdout]   --> src/parser/mod.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub enum ErrorKind {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParserError` is never constructed
[INFO] [stdout]   --> src/parser/mod.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct ParserError {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `with_help` are never used
[INFO] [stdout]   --> src/parser/mod.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl ParserError {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 34 |     pub fn new(kind: ErrorKind, help: Option<String>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn with_help(self, help: String) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser/mod.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct Parser<'a> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `advance`, `peek`, `at_end`, `consume`, and `synchronize` are never used
[INFO] [stdout]    --> src/parser/mod.rs:56:12
[INFO] [stdout]     |
[INFO] [stdout] 55  | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] 56  |     pub fn new(source: &'a str, filename: &'a str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 66  |     fn advance(&mut self) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     fn peek(&mut self) -> &Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     fn at_end(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |     fn consume(&mut self, expected: &TokenKind) -> Result<(), ParserError> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn synchronize(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LiteralKind` is never used
[INFO] [stdout]  --> src/parser/ast.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum LiteralKind {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Annotation` is never used
[INFO] [stdout]   --> src/parser/ast.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub enum Annotation {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/parser/ast.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub enum Expr {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Statement` is never used
[INFO] [stdout]   --> src/parser/ast.rs:93:10
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub enum Statement {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ExprResult` is never used
[INFO] [stdout]  --> src/parser/expression.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | type ExprResult = Result<Spanned<Expr>, ParserError>;
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/parser/expression.rs:12:12
[INFO] [stdout]     |
[INFO] [stdout] 10  | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- methods in this implementation
[INFO] [stdout] 11  |     /// Parses an expression.
[INFO] [stdout] 12  |     pub fn parse_expression(&mut self, precedence: u8) -> ExprResult {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18  |     fn prefix_rule(&mut self, token: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32  |     fn parse_literal(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45  |     fn parse_grouping(&mut self) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58  |     fn parse_tuple(&mut self, first: Spanned<Expr>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79  |     fn parse_unary(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93  |     fn parse_array(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn parse_block(&mut self, current: Spanned<TokenKind>) -> ExprResult {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `StatementResult` is never used
[INFO] [stdout]  --> src/parser/statement.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type StatementResult = Result<Spanned<Statement>, ParserError>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `parse_statement`, `parse_return`, `parse_let`, `parse_annotation`, and `parse_annotation_from` are never used
[INFO] [stdout]   --> src/parser/statement.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl<'a> Parser<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 9  |     /// Parses a statement.
[INFO] [stdout] 10 |     pub fn parse_statement(&mut self) -> StatementResult {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn parse_return(&mut self) -> StatementResult {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn parse_let(&mut self) -> StatementResult {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn parse_annotation(&mut self) -> Result<Spanned<Annotation>, ParserError> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn parse_annotation_from(&self, expr: &Expr) -> Result<Annotation, ParserError> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_keyword` is never used
[INFO] [stdout]   --> src/lexer.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn get_keyword(name: &str) -> TokenKind {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]   --> src/lexer.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct Lexer<'a> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lexer.rs:45:12
[INFO] [stdout]     |
[INFO] [stdout] 44  | impl<'a> Lexer<'a> {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout] 45  |     pub fn new(source: &'a str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 54  |     fn advance(&mut self) -> Option<char> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59  |     fn peek(&mut self) -> Option<&char> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63  |     fn consume(&mut self, expected: char) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74  |     pub fn at_end(&mut self) -> bool {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78  |     fn create_token(&mut self, kind: TokenKind, len: usize) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82  |     fn lex_string(&mut self) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |     fn lex_number(&mut self, first_char: char) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn lex_identifier(&mut self, first_char: char) -> Spanned<TokenKind> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 126 |     pub fn next_token(&mut self) -> Spanned<TokenKind> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Spanned` is never used
[INFO] [stdout]  --> src/span.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type Spanned<T> = (T, Span);
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Span` is never constructed
[INFO] [stdout]  --> src/span.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Span {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TokenKind` is never used
[INFO] [stdout]  --> src/tokens.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum TokenKind {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "ab8eb300bdbf760ef98a268f5675e2607338c3a914b0a00df390a60b9b984fc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab8eb300bdbf760ef98a268f5675e2607338c3a914b0a00df390a60b9b984fc4", kill_on_drop: false }`
[INFO] [stdout] ab8eb300bdbf760ef98a268f5675e2607338c3a914b0a00df390a60b9b984fc4
