[INFO] cloning repository https://github.com/ekusiadadus/monkey_interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ekusiadadus/monkey_interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekusiadadus%2Fmonkey_interpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekusiadadus%2Fmonkey_interpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56f0dea9e35f31b9c74926865368fc552fc72f72
[INFO] checking ekusiadadus/monkey_interpreter against try#7424ce9ff9baac3e9d9f5dd3c85828cddea0134d for pr-136776-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fekusiadadus%2Fmonkey_interpreter" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ekusiadadus/monkey_interpreter
[INFO] finished tweaking git repo https://github.com/ekusiadadus/monkey_interpreter
[INFO] tweaked toml for git repo https://github.com/ekusiadadus/monkey_interpreter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ekusiadadus/monkey_interpreter on toolchain 7424ce9ff9baac3e9d9f5dd3c85828cddea0134d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7424ce9ff9baac3e9d9f5dd3c85828cddea0134d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ekusiadadus/monkey_interpreter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7424ce9ff9baac3e9d9f5dd3c85828cddea0134d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+7424ce9ff9baac3e9d9f5dd3c85828cddea0134d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cd28e2e4c2a6f4a650200f8ad689fbbc1cc119ff4a8320ddf0adf027defd0bb
[INFO] running `Command { std: "docker" "start" "-a" "4cd28e2e4c2a6f4a650200f8ad689fbbc1cc119ff4a8320ddf0adf027defd0bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cd28e2e4c2a6f4a650200f8ad689fbbc1cc119ff4a8320ddf0adf027defd0bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cd28e2e4c2a6f4a650200f8ad689fbbc1cc119ff4a8320ddf0adf027defd0bb", kill_on_drop: false }`
[INFO] [stdout] 4cd28e2e4c2a6f4a650200f8ad689fbbc1cc119ff4a8320ddf0adf027defd0bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+7424ce9ff9baac3e9d9f5dd3c85828cddea0134d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f71fb97512f724618d4ccdcddf7c0d9cfc28b44b5d7831c715bde88b51552f8
[INFO] running `Command { std: "docker" "start" "-a" "7f71fb97512f724618d4ccdcddf7c0d9cfc28b44b5d7831c715bde88b51552f8", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey_interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/parser.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     lexer::{self, Lexer},
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/parser.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     lexer::{self, Lexer},
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Program`
[INFO] [stdout]    --> src/parser.rs:240:37
[INFO] [stdout]     |
[INFO] [stdout] 240 |         ast::{ExpressionNode, Node, Program, StatementNode},
[INFO] [stdout]     |                                     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `precedence_level`
[INFO] [stdout]    --> src/parser.rs:179:36
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn parse_expression(&mut self, precedence_level: PrecedenceLevel) -> Option<ExpressionNode> {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence_level`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PrefixParseFn` is never used
[INFO] [stdout]   --> src/parser.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | type PrefixParseFn = fn(parser: &mut Parser) -> Option<ExpressionNode>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `InfixParseFn` is never used
[INFO] [stdout]   --> src/parser.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type InfixParseFn = fn(parser: &mut Parser, exp: ExpressionNode) -> Option<ExpressionNode>;
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PrecedenceLevel` is never used
[INFO] [stdout]   --> src/parser.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum PrecedenceLevel {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Parser {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/parser.rs:34:8
[INFO] [stdout]     |
[INFO] [stdout]  33 | impl Parser {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout]  34 |     fn new(lexer: Lexer) -> Parser {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  54 |     fn parse_identifier(&mut self) -> Option<ExpressionNode> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  61 |     fn parse_integer_literal(&mut self) -> Option<ExpressionNode> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |     fn parse_prefix_expression(&mut self) -> Option<ExpressionNode> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  97 |     fn next_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |     pub fn parse_program(&mut self) -> Option<Program> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn parse_statement(&mut self) -> Option<StatementNode> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     pub fn parse_let_statement(&mut self) -> Option<StatementNode> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 151 |     pub fn parse_return_statement(&mut self) -> Option<StatementNode> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 166 |     fn parse_expression_statement(&mut self) -> Option<StatementNode> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn parse_expression(&mut self, precedence_level: PrecedenceLevel) -> Option<ExpressionNode> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 191 |     fn no_prefix_parse_fn_error(&mut self, token_kind: TokenKind) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |     fn expect_peek(&mut self, token_kind: TokenKind) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 205 |     fn peek_token_is(&self, token_kind: TokenKind) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn cur_token_is(&self, token_kind: TokenKind) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 213 |     fn errors(&self) -> &Vec<String> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 217 |     fn peek_error(&mut self, token_kind: TokenKind) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 226 |     fn register_prefix(&mut self, token_kind: TokenKind, func: PrefixParseFn) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 230 |     fn register_infix(&mut self, token_kind: TokenKind, func: InfixParseFn) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `precedence_level`
[INFO] [stdout]    --> src/parser.rs:179:36
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn parse_expression(&mut self, precedence_level: PrecedenceLevel) -> Option<ExpressionNode> {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence_level`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Equals`, `LessGreater`, `Sum`, `Product`, and `Call` are never constructed
[INFO] [stdout]   --> src/parser.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum PrecedenceLevel {
[INFO] [stdout]    |      --------------- variants in this enum
[INFO] [stdout] 15 |     Lowest = 0,
[INFO] [stdout] 16 |     Equals = 1,      // ==
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     LessGreater = 2, // > or <
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 18 |     Sum = 3,         // +
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 19 |     Product = 4,     // *
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 20 |     Prefix = 5,      // -
[INFO] [stdout] 21 |     Call = 6,        // function calling
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `infix_parse_fns` is never read
[INFO] [stdout]   --> src/parser.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Parser {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 30 |     infix_parse_fns: HashMap<TokenKind, InfixParseFn>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `register_infix` is never used
[INFO] [stdout]    --> src/parser.rs:230:8
[INFO] [stdout]     |
[INFO] [stdout]  33 | impl Parser {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 230 |     fn register_infix(&mut self, token_kind: TokenKind, func: InfixParseFn) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "7f71fb97512f724618d4ccdcddf7c0d9cfc28b44b5d7831c715bde88b51552f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f71fb97512f724618d4ccdcddf7c0d9cfc28b44b5d7831c715bde88b51552f8", kill_on_drop: false }`
[INFO] [stdout] 7f71fb97512f724618d4ccdcddf7c0d9cfc28b44b5d7831c715bde88b51552f8
