[INFO] cloning repository https://github.com/aaronyoo/monkey-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aaronyoo/monkey-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faaronyoo%2Fmonkey-rs"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faaronyoo%2Fmonkey-rs'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3d3d5ced1a6235c7a552eb26ed15cb7aeec1b404
[INFO] checking aaronyoo/monkey-rs against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faaronyoo%2Fmonkey-rs" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aaronyoo/monkey-rs on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/aaronyoo/monkey-rs
[INFO] finished tweaking git repo https://github.com/aaronyoo/monkey-rs
[INFO] tweaked toml for git repo https://github.com/aaronyoo/monkey-rs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/aaronyoo/monkey-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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] abf81969766a278d92e1229e4c9253b7e127981056656c9d52c62fa792f5cfdd
[INFO] running `"docker" "start" "-a" "abf81969766a278d92e1229e4c9253b7e127981056656c9d52c62fa792f5cfdd"`
[INFO] [stderr]     Checking monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::parser::Error::UnexpectedTokenType`
[INFO] [stderr]  --> src/parser.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use crate::parser::Error::UnexpectedTokenType;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::TokenType::Ident`
[INFO] [stderr]  --> src/parser.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use crate::token::TokenType::Ident;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::Token`
[INFO] [stderr]  --> src/repl.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::token::Token;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::TokenType`
[INFO] [stderr]  --> src/repl.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::token::TokenType;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::parser::Error::UnexpectedTokenType`
[INFO] [stderr]  --> src/parser.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use crate::parser::Error::UnexpectedTokenType;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::TokenType::Ident`
[INFO] [stderr]  --> src/parser.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use crate::token::TokenType::Ident;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::Token`
[INFO] [stderr]  --> src/repl.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::token::Token;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::TokenType`
[INFO] [stderr]  --> src/repl.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::token::TokenType;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `precedence`
[INFO] [stderr]    --> src/parser.rs:159:40
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn parse_expression(&mut self, precedence: Precedence) -> Result<Expression> {
[INFO] [stderr]     |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `precedence`
[INFO] [stderr]    --> src/parser.rs:159:40
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn parse_expression(&mut self, precedence: Precedence) -> Result<Expression> {
[INFO] [stderr]     |                                        ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |         let mut stmt = ExpressionStatement {
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/repl.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut lexer = Lexer::new(program.as_str());
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Program`
[INFO] [stderr]  --> src/ast.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Program(Program),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Statement`
[INFO] [stderr]  --> src/ast.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Statement(Statement),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]  --> src/ast.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Expression(Expression),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PrefixExpression`
[INFO] [stderr]   --> src/ast.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     PrefixExpression(PrefixExpression),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_prefix_fn`
[INFO] [stderr]   --> src/parser.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn register_prefix_fn(&mut self, token_type: TokenType, prefix_fn: PrefixParserFn) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |         let mut stmt = ExpressionStatement {
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_infix_fn`
[INFO] [stderr]   --> src/parser.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn register_infix_fn(&mut self, token_type: TokenType, infix_fn: InfixParserFn) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_prefix_expression`
[INFO] [stderr]   --> src/parser.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn parse_prefix_expression(&mut self) -> PrefixExpression {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Equals`
[INFO] [stderr]    --> src/parser.rs:177:5
[INFO] [stderr]     |
[INFO] [stderr] 177 |     Equals,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LessGreater`
[INFO] [stderr]    --> src/parser.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     LessGreater,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Sum`
[INFO] [stderr]    --> src/parser.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     Sum,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Product`
[INFO] [stderr]    --> src/parser.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     Product,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Prefix`
[INFO] [stderr]    --> src/parser.rs:181:5
[INFO] [stderr]     |
[INFO] [stderr] 181 |     Prefix,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Call`
[INFO] [stderr]    --> src/parser.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     Call,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnexpectedEnd`
[INFO] [stderr]    --> src/parser.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 |     UnexpectedEnd,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/repl.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut lexer = Lexer::new(program.as_str());
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Program`
[INFO] [stderr]  --> src/ast.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Program(Program),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Statement`
[INFO] [stderr]  --> src/ast.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Statement(Statement),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]  --> src/ast.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Expression(Expression),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PrefixExpression`
[INFO] [stderr]   --> src/ast.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     PrefixExpression(PrefixExpression),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_prefix_fn`
[INFO] [stderr]   --> src/parser.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn register_prefix_fn(&mut self, token_type: TokenType, prefix_fn: PrefixParserFn) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `register_infix_fn`
[INFO] [stderr]   --> src/parser.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn register_infix_fn(&mut self, token_type: TokenType, infix_fn: InfixParserFn) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_prefix_expression`
[INFO] [stderr]   --> src/parser.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn parse_prefix_expression(&mut self) -> PrefixExpression {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Equals`
[INFO] [stderr]    --> src/parser.rs:177:5
[INFO] [stderr]     |
[INFO] [stderr] 177 |     Equals,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LessGreater`
[INFO] [stderr]    --> src/parser.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     LessGreater,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Sum`
[INFO] [stderr]    --> src/parser.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     Sum,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Product`
[INFO] [stderr]    --> src/parser.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     Product,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Prefix`
[INFO] [stderr]    --> src/parser.rs:181:5
[INFO] [stderr]     |
[INFO] [stderr] 181 |     Prefix,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Call`
[INFO] [stderr]    --> src/parser.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     Call,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnexpectedEnd`
[INFO] [stderr]    --> src/parser.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 |     UnexpectedEnd,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "abf81969766a278d92e1229e4c9253b7e127981056656c9d52c62fa792f5cfdd"`
[INFO] running `"docker" "rm" "-f" "abf81969766a278d92e1229e4c9253b7e127981056656c9d52c62fa792f5cfdd"`
[INFO] [stdout] abf81969766a278d92e1229e4c9253b7e127981056656c9d52c62fa792f5cfdd