[INFO] updating cached repository https://github.com/daogilvie/rust-monkey
[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/daogilvie/rust-monkey
[INFO] [stderr]    33e005a..1851e5e  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1851e5ee1ce921dcbcc8e4aee8c6ed82a63f01b4
[INFO] checking daogilvie/rust-monkey against master#783139bd8fc3b94fac9a1bf81bba2c506e8221b6 for pr-72644
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogilvie%2Frust-monkey" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/daogilvie/rust-monkey on toolchain 783139bd8fc3b94fac9a1bf81bba2c506e8221b6
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/daogilvie/rust-monkey
[INFO] finished tweaking git repo https://github.com/daogilvie/rust-monkey
[INFO] tweaked toml for git repo https://github.com/daogilvie/rust-monkey written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/daogilvie/rust-monkey already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "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] 8a620a6c98c98c7ab4d08df4fb8aaa2083864d8ea5cf1da9f6397a3e45beb706
[INFO] running `"docker" "start" "-a" "8a620a6c98c98c7ab4d08df4fb8aaa2083864d8ea5cf1da9f6397a3e45beb706"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking rust-monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/parse.rs:415:17
[INFO] [stderr]     |
[INFO] [stderr] 415 |             Err(err) => Err(format!("Cannot parse '{}' to i64", lit)),
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `for_str`
[INFO] [stderr]    --> src/./lex.rs:131:12
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn for_str(input: &str) -> Lexer {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Stub`
[INFO] [stderr]   --> src/parse.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         Stub,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Identifier`
[INFO] [stderr]   --> src/parse.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         Identifier,
[INFO] [stderr]    |         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerLiteral`
[INFO] [stderr]   --> src/parse.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 | /         IntegerLiteral {
[INFO] [stderr] 21 | |             value: i64,
[INFO] [stderr] 22 | |         },
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PrefixExpression`
[INFO] [stderr]   --> src/parse.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 | /         PrefixExpression {
[INFO] [stderr] 24 | |             operator: lex::Token,
[INFO] [stderr] 25 | |             right: Box<ExpressionNode>,
[INFO] [stderr] 26 | |         },
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InfixExpression`
[INFO] [stderr]   --> src/parse.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 | /         InfixExpression {
[INFO] [stderr] 28 | |             left: Box<ExpressionNode>,
[INFO] [stderr] 29 | |             operator: lex::Token,
[INFO] [stderr] 30 | |             right: Box<ExpressionNode>,
[INFO] [stderr] 31 | |         },
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `make_stub`
[INFO] [stderr]   --> src/parse.rs:41:16
[INFO] [stderr]    |
[INFO] [stderr] 41 |         pub fn make_stub() -> ExpressionNode {
[INFO] [stderr]    |                ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Let`
[INFO] [stderr]   --> src/parse.rs:81:9
[INFO] [stderr]    |
[INFO] [stderr] 81 | /         Let {
[INFO] [stderr] 82 | |             name: ExpressionNode,
[INFO] [stderr] 83 | |             value: ExpressionNode,
[INFO] [stderr] 84 | |         },
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Return`
[INFO] [stderr]   --> src/parse.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 | /         Return {
[INFO] [stderr] 86 | |             value: ExpressionNode,
[INFO] [stderr] 87 | |         },
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]   --> src/parse.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 | /         Expression {
[INFO] [stderr] 89 | |             expression: ExpressionNode,
[INFO] [stderr] 90 | |         },
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LOWEST`
[INFO] [stderr]    --> src/parse.rs:168:5
[INFO] [stderr]     |
[INFO] [stderr] 168 |     LOWEST,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `EQUALS`
[INFO] [stderr]    --> src/parse.rs:169:5
[INFO] [stderr]     |
[INFO] [stderr] 169 |     EQUALS,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LESSGREATER`
[INFO] [stderr]    --> src/parse.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 |     LESSGREATER,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SUM`
[INFO] [stderr]    --> src/parse.rs:171:5
[INFO] [stderr]     |
[INFO] [stderr] 171 |     SUM,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PRODUCT`
[INFO] [stderr]    --> src/parse.rs:172:5
[INFO] [stderr]     |
[INFO] [stderr] 172 |     PRODUCT,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PREFIX`
[INFO] [stderr]    --> src/parse.rs:173:5
[INFO] [stderr]     |
[INFO] [stderr] 173 |     PREFIX,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CALL`
[INFO] [stderr]    --> src/parse.rs:174:5
[INFO] [stderr]     |
[INFO] [stderr] 174 |     CALL,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_operator_precedence`
[INFO] [stderr]    --> src/parse.rs:177:4
[INFO] [stderr]     |
[INFO] [stderr] 177 | fn get_operator_precedence(&token: &lex::TokenType) -> OperatorPrecedence {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parser`
[INFO] [stderr]    --> src/parse.rs:191:8
[INFO] [stderr]     |
[INFO] [stderr] 191 | struct Parser<'a> {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `for_lexer`
[INFO] [stderr]    --> src/parse.rs:199:8
[INFO] [stderr]     |
[INFO] [stderr] 199 |     fn for_lexer(mut lexer: lex::Lexer) -> Parser {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `advance_tokens`
[INFO] [stderr]    --> src/parse.rs:211:12
[INFO] [stderr]     |
[INFO] [stderr] 211 |     pub fn advance_tokens(&mut self) -> lex::Token {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse`
[INFO] [stderr]    --> src/parse.rs:219:12
[INFO] [stderr]     |
[INFO] [stderr] 219 |     pub fn parse(&mut self) -> Result<Program, String> {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_statement`
[INFO] [stderr]    --> src/parse.rs:243:8
[INFO] [stderr]     |
[INFO] [stderr] 243 |     fn parse_statement(&mut self) -> Result<StatementNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_next_token_of_type`
[INFO] [stderr]    --> src/parse.rs:251:8
[INFO] [stderr]     |
[INFO] [stderr] 251 |     fn is_next_token_of_type(&self, expected_type: lex::TokenType) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_next_token_precedence`
[INFO] [stderr]    --> src/parse.rs:258:8
[INFO] [stderr]     |
[INFO] [stderr] 258 |     fn get_next_token_precedence(&self) -> OperatorPrecedence {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_current_token_precedence`
[INFO] [stderr]    --> src/parse.rs:265:8
[INFO] [stderr]     |
[INFO] [stderr] 265 |     fn get_current_token_precedence(&self) -> OperatorPrecedence {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_current_token_of_type`
[INFO] [stderr]    --> src/parse.rs:269:8
[INFO] [stderr]     |
[INFO] [stderr] 269 |     fn is_current_token_of_type(&self, expected_type: lex::TokenType) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_let_statement`
[INFO] [stderr]    --> src/parse.rs:273:8
[INFO] [stderr]     |
[INFO] [stderr] 273 |     fn parse_let_statement(&mut self) -> Result<StatementNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_return_statement`
[INFO] [stderr]    --> src/parse.rs:309:8
[INFO] [stderr]     |
[INFO] [stderr] 309 |     fn parse_return_statement(&mut self) -> Result<StatementNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `attempt_parse_expression_statement`
[INFO] [stderr]    --> src/parse.rs:322:8
[INFO] [stderr]     |
[INFO] [stderr] 322 |     fn attempt_parse_expression_statement(&mut self) -> Result<StatementNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_expression`
[INFO] [stderr]    --> src/parse.rs:341:8
[INFO] [stderr]     |
[INFO] [stderr] 341 |     fn parse_expression(
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `attempt_prefix_parse`
[INFO] [stderr]    --> src/parse.rs:371:8
[INFO] [stderr]     |
[INFO] [stderr] 371 |     fn attempt_prefix_parse(&mut self) -> Result<Option<ExpressionNode>, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_parse_infix`
[INFO] [stderr]    --> src/parse.rs:382:8
[INFO] [stderr]     |
[INFO] [stderr] 382 |     fn can_parse_infix(&self) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_identifier`
[INFO] [stderr]    --> src/parse.rs:399:8
[INFO] [stderr]     |
[INFO] [stderr] 399 |     fn parse_identifier(&mut self) -> Result<ExpressionNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_integer_literal`
[INFO] [stderr]    --> src/parse.rs:406:8
[INFO] [stderr]     |
[INFO] [stderr] 406 |     fn parse_integer_literal(&mut self) -> Result<ExpressionNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_prefix_expression`
[INFO] [stderr]    --> src/parse.rs:419:8
[INFO] [stderr]     |
[INFO] [stderr] 419 |     fn parse_prefix_expression(&mut self) -> Result<ExpressionNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_infix_expression`
[INFO] [stderr]    --> src/parse.rs:432:8
[INFO] [stderr]     |
[INFO] [stderr] 432 |     fn parse_infix_expression(&mut self, lhs: ExpressionNode) -> Result<ExpressionNode, String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 38 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/parse.rs:415:17
[INFO] [stderr]     |
[INFO] [stderr] 415 |             Err(err) => Err(format!("Cannot parse '{}' to i64", lit)),
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CALL`
[INFO] [stderr]    --> src/parse.rs:174:5
[INFO] [stderr]     |
[INFO] [stderr] 174 |     CALL,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.16s
[INFO] running `"docker" "inspect" "8a620a6c98c98c7ab4d08df4fb8aaa2083864d8ea5cf1da9f6397a3e45beb706"`
[INFO] running `"docker" "rm" "-f" "8a620a6c98c98c7ab4d08df4fb8aaa2083864d8ea5cf1da9f6397a3e45beb706"`
[INFO] [stdout] 8a620a6c98c98c7ab4d08df4fb8aaa2083864d8ea5cf1da9f6397a3e45beb706