[INFO] updating cached repository https://github.com/jeppester/rust-interpreter
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/jeppester/rust-interpreter
[INFO] [stderr]    9692358..b1329ce  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b1329cea60638c5138598f63d2668ba44653d4c3
[INFO] checking jeppester/rust-interpreter against master#e2223c94bf433fc38234d1303e88cbaf14755863 for pr-69548
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeppester%2Frust-interpreter" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeppester/rust-interpreter on toolchain e2223c94bf433fc38234d1303e88cbaf14755863
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "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-4/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" "+e2223c94bf433fc38234d1303e88cbaf14755863" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+e2223c94bf433fc38234d1303e88cbaf14755863" "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] 11112d6cd3322f74ad4ee434b671b61e3ad55d5bb380ee5ba4440da6d160e788
[INFO] running `"docker" "start" "-a" "11112d6cd3322f74ad4ee434b671b61e3ad55d5bb380ee5ba4440da6d160e788"`
[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: variant is never constructed: `Identifier`
[INFO] [stderr]  --> src/parser/tests.rs:7:3
[INFO] [stderr]   |
[INFO] [stderr] 7 |   Identifier(String),
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CALL`
[INFO] [stderr]   --> src/parser/mod.rs:27:3
[INFO] [stderr]    |
[INFO] [stderr] 27 |   pub const CALL: u8 = 6;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ExpressionStatement`
[INFO] [stderr]   --> src/ast/mod.rs:79:3
[INFO] [stderr]    |
[INFO] [stderr] 79 |   ExpressionStatement(ExpressionStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]    --> src/ast/mod.rs:153:3
[INFO] [stderr]     |
[INFO] [stderr] 153 |   pub fn token_literal(&self) -> Literal {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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: type alias is never used: `Precedence`
[INFO] [stderr]   --> src/parser/mod.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | 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:21:3
[INFO] [stderr]    |
[INFO] [stderr] 21 |   pub const LOWEST: u8 = 0;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `EQUALS`
[INFO] [stderr]   --> src/parser/mod.rs:22:3
[INFO] [stderr]    |
[INFO] [stderr] 22 |   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:23:3
[INFO] [stderr]    |
[INFO] [stderr] 23 |   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:24:3
[INFO] [stderr]    |
[INFO] [stderr] 24 |   pub const SUM: u8 = 3;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PRODUCT`
[INFO] [stderr]   --> src/parser/mod.rs:25:3
[INFO] [stderr]    |
[INFO] [stderr] 25 |   pub const PRODUCT: u8 = 4;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PREFIX`
[INFO] [stderr]   --> src/parser/mod.rs:26:3
[INFO] [stderr]    |
[INFO] [stderr] 26 |   pub const PREFIX: u8 = 5;
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CALL`
[INFO] [stderr]   --> src/parser/mod.rs:27:3
[INFO] [stderr]    |
[INFO] [stderr] 27 |   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:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | 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:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub struct Parser {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_boolean`
[INFO] [stderr]   --> src/parser/mod.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | 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:60:8
[INFO] [stderr]    |
[INFO] [stderr] 60 | 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:70:8
[INFO] [stderr]    |
[INFO] [stderr] 70 | 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:86:8
[INFO] [stderr]    |
[INFO] [stderr] 86 | 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:107:8
[INFO] [stderr]     |
[INFO] [stderr] 107 | 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:130:8
[INFO] [stderr]     |
[INFO] [stderr] 130 | pub fn parse_grouped_expression(parser: &mut Parser) -> Option<Expression> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/parser/mod.rs:143:3
[INFO] [stderr]     |
[INFO] [stderr] 143 |   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:177:3
[INFO] [stderr]     |
[INFO] [stderr] 177 |   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:183:3
[INFO] [stderr]     |
[INFO] [stderr] 183 |   pub fn parse_program(&mut self) -> Program {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_statement`
[INFO] [stderr]    --> src/parser/mod.rs:210:3
[INFO] [stderr]     |
[INFO] [stderr] 210 |   pub fn parse_statement(&mut self) -> Option<Node> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_let_statement`
[INFO] [stderr]    --> src/parser/mod.rs:218:3
[INFO] [stderr]     |
[INFO] [stderr] 218 |   pub fn parse_let_statement(&mut self) -> Option<Node> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_return_statement`
[INFO] [stderr]    --> src/parser/mod.rs:246:3
[INFO] [stderr]     |
[INFO] [stderr] 246 |   pub fn parse_return_statement(&mut self) -> Option<Node> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_expression_statement`
[INFO] [stderr]    --> src/parser/mod.rs:258:3
[INFO] [stderr]     |
[INFO] [stderr] 258 |   pub fn parse_expression_statement(&mut self) -> Option<Node> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_expression`
[INFO] [stderr]    --> src/parser/mod.rs:272:3
[INFO] [stderr]     |
[INFO] [stderr] 272 |   pub fn parse_expression(&mut self, precedence: Precedence) -> Option<Expression> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `current_token_is`
[INFO] [stderr]    --> src/parser/mod.rs:309:3
[INFO] [stderr]     |
[INFO] [stderr] 309 |   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:313:3
[INFO] [stderr]     |
[INFO] [stderr] 313 |   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:317:3
[INFO] [stderr]     |
[INFO] [stderr] 317 |   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:327:3
[INFO] [stderr]     |
[INFO] [stderr] 327 |   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:331:3
[INFO] [stderr]     |
[INFO] [stderr] 331 |   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:335:3
[INFO] [stderr]     |
[INFO] [stderr] 335 |   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:340:3
[INFO] [stderr]     |
[INFO] [stderr] 340 |   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:345:3
[INFO] [stderr]     |
[INFO] [stderr] 345 |   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:353:3
[INFO] [stderr]     |
[INFO] [stderr] 353 | /   pub fn register_prefix(
[INFO] [stderr] 354 | |     &mut self,
[INFO] [stderr] 355 | |     token_type: TokenType,
[INFO] [stderr] 356 | |     parser_function: fn(&mut Parser) -> Option<Expression>,
[INFO] [stderr] ...   |
[INFO] [stderr] 360 | |       .insert(token_type, parser_function);
[INFO] [stderr] 361 | |   }
[INFO] [stderr]     | |___^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_infix`
[INFO] [stderr]    --> src/parser/mod.rs:363:3
[INFO] [stderr]     |
[INFO] [stderr] 363 | /   pub fn register_infix(
[INFO] [stderr] 364 | |     &mut self,
[INFO] [stderr] 365 | |     token_type: TokenType,
[INFO] [stderr] 366 | |     parser_function: fn(&mut Parser, Expression) -> Option<Expression>,
[INFO] [stderr] ...   |
[INFO] [stderr] 370 | |       .insert(token_type, parser_function);
[INFO] [stderr] 371 | |   }
[INFO] [stderr]     | |___^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Boolean`
[INFO] [stderr]   --> src/ast/mod.rs:25:3
[INFO] [stderr]    |
[INFO] [stderr] 25 |   Boolean(Boolean),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Identifier`
[INFO] [stderr]   --> src/ast/mod.rs:26:3
[INFO] [stderr]    |
[INFO] [stderr] 26 |   Identifier(Identifier),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerLiteral`
[INFO] [stderr]   --> src/ast/mod.rs:27:3
[INFO] [stderr]    |
[INFO] [stderr] 27 |   IntegerLiteral(IntegerLiteral),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PrefixExpression`
[INFO] [stderr]   --> src/ast/mod.rs:28:3
[INFO] [stderr]    |
[INFO] [stderr] 28 |   PrefixExpression(PrefixExpression),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InfixExpression`
[INFO] [stderr]   --> src/ast/mod.rs:29:3
[INFO] [stderr]    |
[INFO] [stderr] 29 |   InfixExpression(InfixExpression),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/mod.rs:33:3
[INFO] [stderr]    |
[INFO] [stderr] 33 |   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:43:3
[INFO] [stderr]    |
[INFO] [stderr] 43 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LetStatement`
[INFO] [stderr]   --> src/ast/mod.rs:77:3
[INFO] [stderr]    |
[INFO] [stderr] 77 |   LetStatement(LetStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ReturnStatement`
[INFO] [stderr]   --> src/ast/mod.rs:78:3
[INFO] [stderr]    |
[INFO] [stderr] 78 |   ReturnStatement(ReturnStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ExpressionStatement`
[INFO] [stderr]   --> src/ast/mod.rs:79:3
[INFO] [stderr]    |
[INFO] [stderr] 79 |   ExpressionStatement(ExpressionStatement),
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast/mod.rs:83:3
[INFO] [stderr]    |
[INFO] [stderr] 83 |   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:91:3
[INFO] [stderr]    |
[INFO] [stderr] 91 |   pub fn to_string(&self) -> String {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]    --> src/ast/mod.rs:128:3
[INFO] [stderr]     |
[INFO] [stderr] 128 |   Expression(Expression),
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Statement`
[INFO] [stderr]    --> src/ast/mod.rs:129:3
[INFO] [stderr]     |
[INFO] [stderr] 129 |   Statement(Statement),
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]    --> src/ast/mod.rs:133:3
[INFO] [stderr]     |
[INFO] [stderr] 133 |   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:140:3
[INFO] [stderr]     |
[INFO] [stderr] 140 |   pub fn to_string(&self) -> String {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Program`
[INFO] [stderr]    --> src/ast/mod.rs:148:12
[INFO] [stderr]     |
[INFO] [stderr] 148 | pub struct Program {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]    --> src/ast/mod.rs:153:3
[INFO] [stderr]     |
[INFO] [stderr] 153 |   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:161:3
[INFO] [stderr]     |
[INFO] [stderr] 161 |   pub fn to_string(&self) -> String {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
[INFO] running `"docker" "inspect" "11112d6cd3322f74ad4ee434b671b61e3ad55d5bb380ee5ba4440da6d160e788"`
[INFO] running `"docker" "rm" "-f" "11112d6cd3322f74ad4ee434b671b61e3ad55d5bb380ee5ba4440da6d160e788"`
[INFO] [stdout] 11112d6cd3322f74ad4ee434b671b61e3ad55d5bb380ee5ba4440da6d160e788