[INFO] cloning repository https://github.com/josht-jpg/writing-an-interpreter-in-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/josht-jpg/writing-an-interpreter-in-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjosht-jpg%2Fwriting-an-interpreter-in-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjosht-jpg%2Fwriting-an-interpreter-in-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 25ee177bd19eeff6b11e03258076186acca584f4
[INFO] testing josht-jpg/writing-an-interpreter-in-Rust against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjosht-jpg%2Fwriting-an-interpreter-in-Rust" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/josht-jpg/writing-an-interpreter-in-Rust on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/josht-jpg/writing-an-interpreter-in-Rust
[INFO] finished tweaking git repo https://github.com/josht-jpg/writing-an-interpreter-in-Rust
[INFO] tweaked toml for git repo https://github.com/josht-jpg/writing-an-interpreter-in-Rust written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/josht-jpg/writing-an-interpreter-in-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6082c786a84f3c3704415080b4a00630317f2bc6a6d94afbfbfe47e19a0df0e4
[INFO] running `Command { std: "docker" "start" "-a" "6082c786a84f3c3704415080b4a00630317f2bc6a6d94afbfbfe47e19a0df0e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6082c786a84f3c3704415080b4a00630317f2bc6a6d94afbfbfe47e19a0df0e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6082c786a84f3c3704415080b4a00630317f2bc6a6d94afbfbfe47e19a0df0e4", kill_on_drop: false }`
[INFO] [stdout] 6082c786a84f3c3704415080b4a00630317f2bc6a6d94afbfbfe47e19a0df0e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f8ef4dd0b1b4a6f7f3d2fb98b3efda18ca96f5ea01009b67e36e69998a986f6
[INFO] running `Command { std: "docker" "start" "-a" "3f8ef4dd0b1b4a6f7f3d2fb98b3efda18ca96f5ea01009b67e36e69998a986f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: denote infinite loops with `loop { ... }`
[INFO] [stdout]  --> src/repl.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     while true {
[INFO] [stdout]   |     ^^^^^^^^^^ help: use `loop`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(while_true)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expression_node`
[INFO] [stdout]   --> src/ast.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn expression_node() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ReturnStatement`
[INFO] [stdout]   --> src/ast.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     ReturnStatement,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `statement_node`
[INFO] [stdout]   --> src/ast.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn statement_node() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PROMPT`
[INFO] [stdout]  --> src/repl.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const PROMPT: &str = ">> ";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `start`
[INFO] [stdout]  --> src/repl.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn start() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ASTERISK`
[INFO] [stdout]   --> src/token.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub const ASTERISK: &str = "*";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `LT`
[INFO] [stdout]   --> src/token.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub const LT: &str = "<";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `GT`
[INFO] [stdout]   --> src/token.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub const GT: &str = ">";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Token` should have a snake case name
[INFO] [stdout]   --> src/ast.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub Token: token::Token,
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `token`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Value` should have a snake case name
[INFO] [stdout]   --> src/ast.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub Value: String,
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case (notice the capitalization): `value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Statements` should have a snake case name
[INFO] [stdout]   --> src/ast.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub Statements: Vec<Statement>,
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `statements`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/repl.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         io::stdin().read_line(&mut input);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Type` should have a snake case name
[INFO] [stdout]  --> src/token.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub Type: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: rename the identifier or convert it to a snake case raw identifier
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub r#type: String,
[INFO] [stdout]   |         ~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Literal` should have a snake case name
[INFO] [stdout]  --> src/token.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub Literal: String,
[INFO] [stdout]   |         ^^^^^^^ help: convert the identifier to snake case: `literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "3f8ef4dd0b1b4a6f7f3d2fb98b3efda18ca96f5ea01009b67e36e69998a986f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f8ef4dd0b1b4a6f7f3d2fb98b3efda18ca96f5ea01009b67e36e69998a986f6", kill_on_drop: false }`
[INFO] [stdout] 3f8ef4dd0b1b4a6f7f3d2fb98b3efda18ca96f5ea01009b67e36e69998a986f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1fc0ac82bf67a3a3147c6cab6ba4964aa1f4752a87a7b49a2656479b2551ed6a
[INFO] running `Command { std: "docker" "start" "-a" "1fc0ac82bf67a3a3147c6cab6ba4964aa1f4752a87a7b49a2656479b2551ed6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: denote infinite loops with `loop { ... }`
[INFO] [stdout]  --> src/repl.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     while true {
[INFO] [stdout]   |     ^^^^^^^^^^ help: use `loop`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(while_true)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expression_node`
[INFO] [stdout]   --> src/ast.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn expression_node() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ReturnStatement`
[INFO] [stdout]   --> src/ast.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     ReturnStatement,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `statement_node`
[INFO] [stdout]   --> src/ast.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn statement_node() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PROMPT`
[INFO] [stdout]  --> src/repl.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const PROMPT: &str = ">> ";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `start`
[INFO] [stdout]  --> src/repl.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn start() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ASTERISK`
[INFO] [stdout]   --> src/token.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub const ASTERISK: &str = "*";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `LT`
[INFO] [stdout]   --> src/token.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub const LT: &str = "<";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `GT`
[INFO] [stdout]   --> src/token.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub const GT: &str = ">";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Token` should have a snake case name
[INFO] [stdout]   --> src/ast.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub Token: token::Token,
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case: `token`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Value` should have a snake case name
[INFO] [stdout]   --> src/ast.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub Value: String,
[INFO] [stdout]    |         ^^^^^ help: convert the identifier to snake case (notice the capitalization): `value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Statements` should have a snake case name
[INFO] [stdout]   --> src/ast.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub Statements: Vec<Statement>,
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `statements`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/repl.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         io::stdin().read_line(&mut input);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Type` should have a snake case name
[INFO] [stdout]  --> src/token.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub Type: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: rename the identifier or convert it to a snake case raw identifier
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub r#type: String,
[INFO] [stdout]   |         ~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `Literal` should have a snake case name
[INFO] [stdout]  --> src/token.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub Literal: String,
[INFO] [stdout]   |         ^^^^^^^ help: convert the identifier to snake case: `literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "1fc0ac82bf67a3a3147c6cab6ba4964aa1f4752a87a7b49a2656479b2551ed6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fc0ac82bf67a3a3147c6cab6ba4964aa1f4752a87a7b49a2656479b2551ed6a", kill_on_drop: false }`
[INFO] [stdout] 1fc0ac82bf67a3a3147c6cab6ba4964aa1f4752a87a7b49a2656479b2551ed6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c25d64e3ae1d9d74cae6023934d431a24bf8119c11e2e75f8c4c2e1745eee4c5
[INFO] running `Command { std: "docker" "start" "-a" "c25d64e3ae1d9d74cae6023934d431a24bf8119c11e2e75f8c4c2e1745eee4c5", kill_on_drop: false }`
[INFO] [stderr] warning: denote infinite loops with `loop { ... }`
[INFO] [stderr]  --> src/repl.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     while true {
[INFO] [stderr]   |     ^^^^^^^^^^ help: use `loop`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(while_true)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `expression_node`
[INFO] [stderr]   --> src/ast.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn expression_node() {}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ReturnStatement`
[INFO] [stderr]   --> src/ast.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     ReturnStatement,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `statement_node`
[INFO] [stderr]   --> src/ast.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn statement_node() {}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PROMPT`
[INFO] [stderr]  --> src/repl.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | const PROMPT: &str = ">> ";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `start`
[INFO] [stderr]  --> src/repl.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn start() {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `ASTERISK`
[INFO] [stderr]   --> src/token.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub const ASTERISK: &str = "*";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `LT`
[INFO] [stderr]   --> src/token.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub const LT: &str = "<";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `GT`
[INFO] [stderr]   --> src/token.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub const GT: &str = ">";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Token` should have a snake case name
[INFO] [stderr]   --> src/ast.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub Token: token::Token,
[INFO] [stderr]    |         ^^^^^ help: convert the identifier to snake case: `token`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Value` should have a snake case name
[INFO] [stderr]   --> src/ast.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub Value: String,
[INFO] [stderr]    |         ^^^^^ help: convert the identifier to snake case (notice the capitalization): `value`
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Statements` should have a snake case name
[INFO] [stderr]   --> src/ast.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub Statements: Vec<Statement>,
[INFO] [stderr]    |         ^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `statements`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/repl.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         io::stdin().read_line(&mut input);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Type` should have a snake case name
[INFO] [stderr]  --> src/token.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub Type: String,
[INFO] [stderr]   |         ^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: rename the identifier or convert it to a snake case raw identifier
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub r#type: String,
[INFO] [stderr]   |         ~~~~~~
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `Literal` should have a snake case name
[INFO] [stderr]  --> src/token.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub Literal: String,
[INFO] [stderr]   |         ^^^^^^^ help: convert the identifier to snake case: `literal`
[INFO] [stderr] 
[INFO] [stderr] warning: `interpreter` (bin "interpreter" test) generated 15 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/interpreter-4298478da1d31aad)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c25d64e3ae1d9d74cae6023934d431a24bf8119c11e2e75f8c4c2e1745eee4c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c25d64e3ae1d9d74cae6023934d431a24bf8119c11e2e75f8c4c2e1745eee4c5", kill_on_drop: false }`
[INFO] [stdout] c25d64e3ae1d9d74cae6023934d431a24bf8119c11e2e75f8c4c2e1745eee4c5