[INFO] cloning repository https://github.com/jeppester/rust-interpreter
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeppester/rust-interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeppester%2Frust-interpreter"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeppester%2Frust-interpreter'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4377773ec4cf0ed0fff0b49c68e4dd74c2d8ce54
[INFO] checking jeppester/rust-interpreter against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeppester%2Frust-interpreter" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeppester/rust-interpreter on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jeppester/rust-interpreter
[INFO] finished tweaking git repo https://github.com/jeppester/rust-interpreter
[INFO] tweaked toml for git repo https://github.com/jeppester/rust-interpreter written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/jeppester/rust-interpreter already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7810ecdf48ea86d6af0d030da394fe42e8f68d48c27d7b0a198af14429bf4d41
[INFO] running `"docker" "start" "-a" "7810ecdf48ea86d6af0d030da394fe42e8f68d48c27d7b0a198af14429bf4d41"`
[INFO] [stderr]     Checking monkey-interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/lexer/mod.rs:68:7
[INFO] [stderr]    |
[INFO] [stderr] 68 |       ('0' <= ch && ch <= '9')
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/parser/mod.rs:423:8
[INFO] [stderr]     |
[INFO] [stderr] 423 |     if (self.peek_token_is(token_types::RPAREN)) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/parser/mod.rs:429:10
[INFO] [stderr]     |
[INFO] [stderr] 429 |       if (!self.expect_peek(token_types::IDENT)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/parser/mod.rs:444:10
[INFO] [stderr]     |
[INFO] [stderr] 444 |       if (!self.expect_peek(token_types::COMMA)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/lexer/mod.rs:68:7
[INFO] [stderr]    |
[INFO] [stderr] 68 |       ('0' <= ch && ch <= '9')
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/parser/mod.rs:423:8
[INFO] [stderr]     |
[INFO] [stderr] 423 |     if (self.peek_token_is(token_types::RPAREN)) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/parser/mod.rs:429:10
[INFO] [stderr]     |
[INFO] [stderr] 429 |       if (!self.expect_peek(token_types::IDENT)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/parser/mod.rs:444:10
[INFO] [stderr]     |
[INFO] [stderr] 444 |       if (!self.expect_peek(token_types::COMMA)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Precedence`
[INFO] [stderr]   --> src/parser/mod.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type Precedence = u8;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `LOWEST`
[INFO] [stderr]   --> src/parser/mod.rs:27:3
[INFO] [stderr]    |
[INFO] [stderr] 27 |   pub const LOWEST: u8 = 0;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `EQUALS`
[INFO] [stderr]   --> src/parser/mod.rs:28:3
[INFO] [stderr]    |
[INFO] [stderr] 28 |   pub const EQUALS: u8 = 1;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `LESS_OR_GREATER`
[INFO] [stderr]   --> src/parser/mod.rs:29:3
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub const LESS_OR_GREATER: u8 = 2;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SUM`
[INFO] [stderr]   --> src/parser/mod.rs:30:3
[INFO] [stderr]    |
[INFO] [stderr] 30 |   pub const SUM: u8 = 3;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PRODUCT`
[INFO] [stderr]   --> src/parser/mod.rs:31:3
[INFO] [stderr]    |
[INFO] [stderr] 31 |   pub const PRODUCT: u8 = 4;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PREFIX`
[INFO] [stderr]   --> src/parser/mod.rs:32:3
[INFO] [stderr]    |
[INFO] [stderr] 32 |   pub const PREFIX: u8 = 5;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CALL`
[INFO] [stderr]   --> src/parser/mod.rs:33:3
[INFO] [stderr]    |
[INFO] [stderr] 33 |   pub const CALL: u8 = 6;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_operator_precedence`
[INFO] [stderr]   --> src/parser/mod.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn get_operator_precedence(token_type: TokenType) -> Precedence {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parser`
[INFO] [stderr]   --> src/parser/mod.rs:50:12
[INFO] [stderr]    |
[INFO] [stderr] 50 | pub struct Parser {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_boolean`
[INFO] [stderr]   --> src/parser/mod.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn parse_boolean(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_identifier`
[INFO] [stderr]   --> src/parser/mod.rs:66:8
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn parse_identifier(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_integer_literal`
[INFO] [stderr]   --> src/parser/mod.rs:76:8
[INFO] [stderr]    |
[INFO] [stderr] 76 | pub fn parse_integer_literal(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_prefix_expression`
[INFO] [stderr]   --> src/parser/mod.rs:92:8
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn parse_prefix_expression(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_infix_expression`
[INFO] [stderr]    --> src/parser/mod.rs:113:8
[INFO] [stderr]     |
[INFO] [stderr] 113 | pub fn parse_infix_expression(parser: &mut Parser, left: Expression) -> Option<Expression> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_grouped_expression`
[INFO] [stderr]    --> src/parser/mod.rs:136:8
[INFO] [stderr]     |
[INFO] [stderr] 136 | pub fn parse_grouped_expression(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_if_expression`
[INFO] [stderr]    --> src/parser/mod.rs:148:8
[INFO] [stderr]     |
[INFO] [stderr] 148 | pub fn parse_if_expression(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_function_literal`
[INFO] [stderr]    --> src/parser/mod.rs:190:8
[INFO] [stderr]     |
[INFO] [stderr] 190 | pub fn parse_function_literal(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/parser/mod.rs:218:3
[INFO] [stderr]     |
[INFO] [stderr] 218 |   pub fn new(mut lexer: Lexer) -> Self {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]    --> src/parser/mod.rs:255:3
[INFO] [stderr]     |
[INFO] [stderr] 255 |   pub fn next_token(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_program`
[INFO] [stderr]    --> src/parser/mod.rs:261:3
[INFO] [stderr]     |
[INFO] [stderr] 261 |   pub fn parse_program(&mut self) -> Program {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_block_statement`
[INFO] [stderr]    --> src/parser/mod.rs:288:3
[INFO] [stderr]     |
[INFO] [stderr] 288 |   pub fn parse_block_statement(&mut self) -> BlockStatement {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_statement`
[INFO] [stderr]    --> src/parser/mod.rs:310:3
[INFO] [stderr]     |
[INFO] [stderr] 310 |   pub fn parse_statement(&mut self) -> Option<Statement> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_let_statement`
[INFO] [stderr]    --> src/parser/mod.rs:318:3
[INFO] [stderr]     |
[INFO] [stderr] 318 |   pub fn parse_let_statement(&mut self) -> Option<Statement> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_return_statement`
[INFO] [stderr]    --> src/parser/mod.rs:346:3
[INFO] [stderr]     |
[INFO] [stderr] 346 |   pub fn parse_return_statement(&mut self) -> Option<Statement> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_expression_statement`
[INFO] [stderr]    --> src/parser/mod.rs:369:3
[INFO] [stderr]     |
[INFO] [stderr] 369 |   pub fn parse_expression_statement(&mut self) -> Option<Statement> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_expression`
[INFO] [stderr]    --> src/parser/mod.rs:383:3
[INFO] [stderr]     |
[INFO] [stderr] 383 |   pub fn parse_expression(&mut self, precedence: Precedence) -> Option<Expression> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_function_arguments`
[INFO] [stderr]    --> src/parser/mod.rs:420:3
[INFO] [stderr]     |
[INFO] [stderr] 420 |   pub fn parse_function_arguments(&mut self) -> Option<Vec<Identifier>> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `current_token_is`
[INFO] [stderr]    --> src/parser/mod.rs:452:3
[INFO] [stderr]     |
[INFO] [stderr] 452 |   pub fn current_token_is(&mut self, token_type: TokenType) -> bool {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_token_is`
[INFO] [stderr]    --> src/parser/mod.rs:456:3
[INFO] [stderr]     |
[INFO] [stderr] 456 |   pub fn peek_token_is(&mut self, token_type: TokenType) -> bool {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_peek`
[INFO] [stderr]    --> src/parser/mod.rs:460:3
[INFO] [stderr]     |
[INFO] [stderr] 460 |   pub fn expect_peek(&mut self, token_type: TokenType) -> bool {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `current_precedence`
[INFO] [stderr]    --> src/parser/mod.rs:470:3
[INFO] [stderr]     |
[INFO] [stderr] 470 |   pub fn current_precedence(&mut self) -> Precedence {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_precedence`
[INFO] [stderr]    --> src/parser/mod.rs:474:3
[INFO] [stderr]     |
[INFO] [stderr] 474 |   pub fn peek_precedence(&mut self) -> Precedence {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prefix_parser_error`
[INFO] [stderr]    --> src/parser/mod.rs:478:3
[INFO] [stderr]     |
[INFO] [stderr] 478 |   pub fn prefix_parser_error(&mut self, token_type: TokenType) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `no_right_error`
[INFO] [stderr]    --> src/parser/mod.rs:483:3
[INFO] [stderr]     |
[INFO] [stderr] 483 |   pub fn no_right_error(&mut self, token_type: TokenType) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_error`
[INFO] [stderr]    --> src/parser/mod.rs:488:3
[INFO] [stderr]     |
[INFO] [stderr] 488 |   pub fn peek_error(&mut self, token_type: TokenType) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_prefix`
[INFO] [stderr]    --> src/parser/mod.rs:496:3
[INFO] [stderr]     |
[INFO] [stderr] 496 | /   pub fn register_prefix(
[INFO] [stderr] 497 | |     &mut self,
[INFO] [stderr] 498 | |     token_type: TokenType,
[INFO] [stderr] 499 | |     parser_function: fn(&mut Parser) -> Option<Expression>,
[INFO] [stderr] ...   |
[INFO] [stderr] 503 | |       .insert(token_type, parser_function);
[INFO] [stderr] 504 | |   }
[INFO] [stderr]     | |___^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_infix`
[INFO] [stderr]    --> src/parser/mod.rs:506:3
[INFO] [stderr]     |
[INFO] [stderr] 506 | /   pub fn register_infix(
[INFO] [stderr] 507 | |     &mut self,
[INFO] [stderr] 508 | |     token_type: TokenType,
[INFO] [stderr] 509 | |     parser_function: fn(&mut Parser, Expression) -> Option<Expression>,
[INFO] [stderr] ...   |
[INFO] [stderr] 513 | |       .insert(token_type, parser_function);
[INFO] [stderr] 514 | |   }
[INFO] [stderr]     | |___^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/block_statement.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/block_statement.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/boolean_literal.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/boolean_literal.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/function_literal.rs:13:3
[INFO] [stderr]    |
[INFO] [stderr] 13 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/function_literal.rs:17:3
[INFO] [stderr]    |
[INFO] [stderr] 17 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/identifier.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/identifier.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/if_expression.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/if_expression.rs:18:3
[INFO] [stderr]    |
[INFO] [stderr] 18 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/infix_expression.rs:13:3
[INFO] [stderr]    |
[INFO] [stderr] 13 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/infix_expression.rs:17:3
[INFO] [stderr]    |
[INFO] [stderr] 17 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/integer_literal.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/integer_literal.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/let_statement.rs:13:3
[INFO] [stderr]    |
[INFO] [stderr] 13 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/let_statement.rs:17:3
[INFO] [stderr]    |
[INFO] [stderr] 17 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/prefix_expression.rs:12:3
[INFO] [stderr]    |
[INFO] [stderr] 12 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/prefix_expression.rs:16:3
[INFO] [stderr]    |
[INFO] [stderr] 16 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/return_statement.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/return_statement.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BooleanLiteral`
[INFO] [stderr]   --> src/ast/mod.rs:29:3
[INFO] [stderr]    |
[INFO] [stderr] 29 |   BooleanLiteral(BooleanLiteral),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Identifier`
[INFO] [stderr]   --> src/ast/mod.rs:30:3
[INFO] [stderr]    |
[INFO] [stderr] 30 |   Identifier(Identifier),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerLiteral`
[INFO] [stderr]   --> src/ast/mod.rs:31:3
[INFO] [stderr]    |
[INFO] [stderr] 31 |   IntegerLiteral(IntegerLiteral),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PrefixExpression`
[INFO] [stderr]   --> src/ast/mod.rs:32:3
[INFO] [stderr]    |
[INFO] [stderr] 32 |   PrefixExpression(PrefixExpression),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InfixExpression`
[INFO] [stderr]   --> src/ast/mod.rs:33:3
[INFO] [stderr]    |
[INFO] [stderr] 33 |   InfixExpression(InfixExpression),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IfExpression`
[INFO] [stderr]   --> src/ast/mod.rs:34:3
[INFO] [stderr]    |
[INFO] [stderr] 34 |   IfExpression(IfExpression),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `FunctionLiteral`
[INFO] [stderr]   --> src/ast/mod.rs:35:3
[INFO] [stderr]    |
[INFO] [stderr] 35 |   FunctionLiteral(FunctionLiteral),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/mod.rs:39:3
[INFO] [stderr]    |
[INFO] [stderr] 39 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/mod.rs:51:3
[INFO] [stderr]    |
[INFO] [stderr] 51 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LetStatement`
[INFO] [stderr]   --> src/ast/mod.rs:66:3
[INFO] [stderr]    |
[INFO] [stderr] 66 |   LetStatement(LetStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ReturnStatement`
[INFO] [stderr]   --> src/ast/mod.rs:67:3
[INFO] [stderr]    |
[INFO] [stderr] 67 |   ReturnStatement(ReturnStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]   --> src/ast/mod.rs:68:3
[INFO] [stderr]    |
[INFO] [stderr] 68 |   Expression(Expression),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BlockStatement`
[INFO] [stderr]   --> src/ast/mod.rs:69:3
[INFO] [stderr]    |
[INFO] [stderr] 69 |   BlockStatement(BlockStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/mod.rs:73:3
[INFO] [stderr]    |
[INFO] [stderr] 73 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/ast/mod.rs:82:3
[INFO] [stderr]    |
[INFO] [stderr] 82 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Program`
[INFO] [stderr]   --> src/ast/mod.rs:92:12
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub struct Program {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/mod.rs:97:3
[INFO] [stderr]    |
[INFO] [stderr] 97 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]    --> src/ast/mod.rs:105:3
[INFO] [stderr]     |
[INFO] [stderr] 105 |   pub fn to_string(&self) -> String {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 80 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CALL`
[INFO] [stderr]   --> src/parser/mod.rs:33:3
[INFO] [stderr]    |
[INFO] [stderr] 33 |   pub const CALL: u8 = 6;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BlockStatement`
[INFO] [stderr]   --> src/ast/mod.rs:69:3
[INFO] [stderr]    |
[INFO] [stderr] 69 |   BlockStatement(BlockStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/mod.rs:97:3
[INFO] [stderr]    |
[INFO] [stderr] 97 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `"docker" "inspect" "7810ecdf48ea86d6af0d030da394fe42e8f68d48c27d7b0a198af14429bf4d41"`
[INFO] running `"docker" "rm" "-f" "7810ecdf48ea86d6af0d030da394fe42e8f68d48c27d7b0a198af14429bf4d41"`
[INFO] [stdout] 7810ecdf48ea86d6af0d030da394fe42e8f68d48c27d7b0a198af14429bf4d41