[INFO] updating cached repository https://github.com/ogata-k/monkey-rs
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d0e520c65e14d0736d14200f0b460dea85e8c67b
[INFO] checking ogata-k/monkey-rs against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogata-k%2Fmonkey-rs" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ogata-k/monkey-rs on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ogata-k/monkey-rs
[INFO] finished tweaking git repo https://github.com/ogata-k/monkey-rs
[INFO] tweaked toml for git repo https://github.com/ogata-k/monkey-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/ogata-k/monkey-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 2e12e78bf17e1cd32b7e01a39ae72d9b1ab8beb10aa979d00753f6b465094314
[INFO] running `"docker" "start" "-a" "2e12e78bf17e1cd32b7e01a39ae72d9b1ab8beb10aa979d00753f6b465094314"`
[INFO] [stderr]     Checking monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/parser.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |         ;
[INFO] [stderr]     |         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolon)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/parser.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |         ;
[INFO] [stderr]     |         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolon)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]   --> src/repl.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 | /         while let tok = lexer.next_token() {
[INFO] [stderr] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stderr] 37 | |                 break;
[INFO] [stderr] 38 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stderr] 44 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tok` is never read
[INFO] [stderr]    --> src/lexer.rs:109:17
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut tok: Option<Token> = None;
[INFO] [stderr]     |                 ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut result = Object::NULL;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stmt`
[INFO] [stderr]   --> src/evaluator.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |             stmt @ Statement::LetStatement {
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_stmt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut result = Object::NULL;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:85:17
[INFO] [stderr]    |
[INFO] [stderr] 85 |         let mut result = Object::NULL;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_token_is_prefix`
[INFO] [stderr]   --> src/parser.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn peek_token_is_prefix(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_prefix_precedence`
[INFO] [stderr]    --> src/parser.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]   --> src/repl.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 | /         while let tok = lexer.next_token() {
[INFO] [stderr] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stderr] 37 | |                 break;
[INFO] [stderr] 38 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stderr] 44 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tok` is never read
[INFO] [stderr]    --> src/lexer.rs:109:17
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut tok: Option<Token> = None;
[INFO] [stderr]     |                 ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut result = Object::NULL;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stmt`
[INFO] [stderr]   --> src/evaluator.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |             stmt @ Statement::LetStatement {
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_stmt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut result = Object::NULL;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:85:17
[INFO] [stderr]    |
[INFO] [stderr] 85 |         let mut result = Object::NULL;
[INFO] [stderr]    |                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/evaluator.rs:334:13
[INFO] [stderr]     |
[INFO] [stderr] 334 |         let mut lexer = Lexer::new(input);
[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: `peek_token_is_prefix`
[INFO] [stderr]   --> src/parser.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn peek_token_is_prefix(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_prefix_precedence`
[INFO] [stderr]    --> src/parser.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `"docker" "inspect" "2e12e78bf17e1cd32b7e01a39ae72d9b1ab8beb10aa979d00753f6b465094314"`
[INFO] running `"docker" "rm" "-f" "2e12e78bf17e1cd32b7e01a39ae72d9b1ab8beb10aa979d00753f6b465094314"`
[INFO] [stdout] 2e12e78bf17e1cd32b7e01a39ae72d9b1ab8beb10aa979d00753f6b465094314