[INFO] cloning repository https://github.com/AntPeixe/monkey-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AntPeixe/monkey-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAntPeixe%2Fmonkey-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAntPeixe%2Fmonkey-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0804a8d6db4a5a66b4903aa66ee5a16fbf2b60e2
[INFO] testing AntPeixe/monkey-rs against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAntPeixe%2Fmonkey-rs" "/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/AntPeixe/monkey-rs
[INFO] finished tweaking git repo https://github.com/AntPeixe/monkey-rs
[INFO] tweaked toml for git repo https://github.com/AntPeixe/monkey-rs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AntPeixe/monkey-rs on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AntPeixe/monkey-rs 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7ecbc2d2e9e47ec5ca9f3b3d372255ccfcf6c2dbf0c2223b9511e5c96079ec2
[INFO] running `Command { std: "docker" "start" "-a" "a7ecbc2d2e9e47ec5ca9f3b3d372255ccfcf6c2dbf0c2223b9511e5c96079ec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7ecbc2d2e9e47ec5ca9f3b3d372255ccfcf6c2dbf0c2223b9511e5c96079ec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7ecbc2d2e9e47ec5ca9f3b3d372255ccfcf6c2dbf0c2223b9511e5c96079ec2", kill_on_drop: false }`
[INFO] [stdout] a7ecbc2d2e9e47ec5ca9f3b3d372255ccfcf6c2dbf0c2223b9511e5c96079ec2
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 974b05ccea66970b696b2de1c8169940f894a6a0d87d995e3a388aae53ac8e82
[INFO] running `Command { std: "docker" "start" "-a" "974b05ccea66970b696b2de1c8169940f894a6a0d87d995e3a388aae53ac8e82", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]    --> src/parser.rs:124:32
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn parse_expression(&self, precedence: Precedence) -> Option<Expression> {
[INFO] [stdout]     |                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> src/parser.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Parser {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Precedence` is never used
[INFO] [stdout]   --> src/parser.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Precedence {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/parser.rs:24:12
[INFO] [stdout]     |
[INFO] [stdout] 23  | impl Parser {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] 24  |     pub fn new(lexer: Lexer) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36  |     pub fn parse_program(&mut self) -> Program {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |     fn parse_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58  |     fn next_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63  |     fn curr_token_is(&self, other: Token) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 70  |     fn peek_token_is(&self, other: Token) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77  |     fn expect_peek(&mut self, other: Token) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |     fn parse_return_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96  |     fn parse_let_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 114 |     fn parse_expression_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn parse_expression(&self, precedence: Precedence) -> Option<Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prefix_parsing_fn` is never used
[INFO] [stdout]    --> src/parser.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn prefix_parsing_fn(token: &Token) -> Option<Expression> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Node` is never used
[INFO] [stdout]  --> src/ast.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Node {
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Statement` is never used
[INFO] [stdout]  --> src/ast.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Statement {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `statement_node` is never used
[INFO] [stdout]   --> src/ast.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Statement {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 15 |     fn statement_node(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]   --> src/ast.rs:29:10
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub enum Expression {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `expression_node` is never used
[INFO] [stdout]   --> src/ast.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Expression {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 34 |     fn expression_node(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Program` is never constructed
[INFO] [stdout]   --> src/ast.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub struct Program {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ast.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 52 | impl Program {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 53 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "974b05ccea66970b696b2de1c8169940f894a6a0d87d995e3a388aae53ac8e82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "974b05ccea66970b696b2de1c8169940f894a6a0d87d995e3a388aae53ac8e82", kill_on_drop: false }`
[INFO] [stdout] 974b05ccea66970b696b2de1c8169940f894a6a0d87d995e3a388aae53ac8e82
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d1ffcf0980c0b85690fd2ac46a3e388397a77013ed8f5bd971c94ce15584d21
[INFO] running `Command { std: "docker" "start" "-a" "8d1ffcf0980c0b85690fd2ac46a3e388397a77013ed8f5bd971c94ce15584d21", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]    --> src/parser.rs:124:32
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn parse_expression(&self, precedence: Precedence) -> Option<Expression> {
[INFO] [stdout]     |                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Equals`, `LessGreater`, `Sum`, `Product`, `Prefix`, and `Call` are never constructed
[INFO] [stdout]   --> src/parser.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Precedence {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 14 |     Lowest,
[INFO] [stdout] 15 |     Equals,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 16 |     LessGreater,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 17 |     Sum,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 18 |     Product,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 19 |     Prefix,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 20 |     Call,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek_token_is` is never used
[INFO] [stdout]   --> src/parser.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Parser {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 70 |     fn peek_token_is(&self, other: Token) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Node` is never used
[INFO] [stdout]  --> src/ast.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Node {
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `statement_node` is never used
[INFO] [stdout]   --> src/ast.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Statement {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 15 |     fn statement_node(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `expression_node` is never used
[INFO] [stdout]   --> src/ast.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Expression {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 34 |     fn expression_node(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "8d1ffcf0980c0b85690fd2ac46a3e388397a77013ed8f5bd971c94ce15584d21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d1ffcf0980c0b85690fd2ac46a3e388397a77013ed8f5bd971c94ce15584d21", kill_on_drop: false }`
[INFO] [stdout] 8d1ffcf0980c0b85690fd2ac46a3e388397a77013ed8f5bd971c94ce15584d21
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 277a47ac118c57264dfffcc8e26841107112f5d28fd67956d29b1e0d7cd95331
[INFO] running `Command { std: "docker" "start" "-a" "277a47ac118c57264dfffcc8e26841107112f5d28fd67956d29b1e0d7cd95331", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `precedence`
[INFO] [stderr]    --> src/parser.rs:124:32
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn parse_expression(&self, precedence: Precedence) -> Option<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: variants `Equals`, `LessGreater`, `Sum`, `Product`, `Prefix`, and `Call` are never constructed
[INFO] [stderr]   --> src/parser.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | enum Precedence {
[INFO] [stderr]    |      ---------- variants in this enum
[INFO] [stderr] 14 |     Lowest,
[INFO] [stderr] 15 |     Equals,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 16 |     LessGreater,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 17 |     Sum,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 18 |     Product,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 19 |     Prefix,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 20 |     Call,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `peek_token_is` is never used
[INFO] [stderr]   --> src/parser.rs:70:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Parser {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 70 |     fn peek_token_is(&self, other: Token) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Node` is never used
[INFO] [stderr]  --> src/ast.rs:3:7
[INFO] [stderr]   |
[INFO] [stderr] 3 | trait Node {
[INFO] [stderr]   |       ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `statement_node` is never used
[INFO] [stderr]   --> src/ast.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl Statement {
[INFO] [stderr]    | -------------- method in this implementation
[INFO] [stderr] 15 |     fn statement_node(&self) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `expression_node` is never used
[INFO] [stderr]   --> src/ast.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl Expression {
[INFO] [stderr]    | --------------- method in this implementation
[INFO] [stderr] 34 |     fn expression_node(&self) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `monkey-rs` (bin "monkey-rs" test) generated 6 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/monkey_rs-dc50e3c5b8f34fae)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test lexer::lexer_test ... ok
[INFO] [stdout] test parser::return_statement_test ... ok
[INFO] [stdout] test parser::let_statement_test ... ok
[INFO] [stdout] test parser::identifier_expression_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "277a47ac118c57264dfffcc8e26841107112f5d28fd67956d29b1e0d7cd95331", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "277a47ac118c57264dfffcc8e26841107112f5d28fd67956d29b1e0d7cd95331", kill_on_drop: false }`
[INFO] [stdout] 277a47ac118c57264dfffcc8e26841107112f5d28fd67956d29b1e0d7cd95331
