[INFO] cloning repository https://github.com/bigdragon0610/monkey_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bigdragon0610/monkey_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigdragon0610%2Fmonkey_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigdragon0610%2Fmonkey_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 624d2f63d380d0c086eee91634819dccefeb53b0
[INFO] checking bigdragon0610/monkey_rust against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigdragon0610%2Fmonkey_rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/bigdragon0610/monkey_rust
[INFO] finished tweaking git repo https://github.com/bigdragon0610/monkey_rust
[INFO] tweaked toml for git repo https://github.com/bigdragon0610/monkey_rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bigdragon0610/monkey_rust on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bigdragon0610/monkey_rust 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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74841da6f152be338bc7be4e48e459e4f9394cab1640c6d548cb60bba1740de1
[INFO] running `Command { std: "docker" "start" "-a" "74841da6f152be338bc7be4e48e459e4f9394cab1640c6d548cb60bba1740de1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74841da6f152be338bc7be4e48e459e4f9394cab1640c6d548cb60bba1740de1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74841da6f152be338bc7be4e48e459e4f9394cab1640c6d548cb60bba1740de1", kill_on_drop: false }`
[INFO] [stdout] 74841da6f152be338bc7be4e48e459e4f9394cab1640c6d548cb60bba1740de1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a0a4eeae93107f3d2da68c69bbff05caa05e83116f8a4f423636ec5720d25c2
[INFO] running `Command { std: "docker" "start" "-a" "9a0a4eeae93107f3d2da68c69bbff05caa05e83116f8a4f423636ec5720d25c2", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]    --> src/parser.rs:129:36
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn parse_expression(&mut self, precedence: usize) -> Option<Expression> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Program` is never constructed
[INFO] [stdout]  --> src/ast.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Program {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `token_literal`, and `string` are never used
[INFO] [stdout]   --> src/ast.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Program {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout]  9 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn token_literal(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Node` is never used
[INFO] [stdout]   --> src/ast.rs:24:11
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub trait Node {
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Statement` is never used
[INFO] [stdout]   --> src/ast.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub enum Statement {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LetStatement` is never constructed
[INFO] [stdout]   --> src/ast.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct LetStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ast.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl LetStatement {
[INFO] [stdout]    | ----------------- associated function in this implementation
[INFO] [stdout] 62 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ReturnStatement` is never constructed
[INFO] [stdout]   --> src/ast.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub struct ReturnStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ast.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 92 | impl ReturnStatement {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 93 |     pub fn new(token: Token) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExpressionStatement` is never constructed
[INFO] [stdout]    --> src/ast.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 | pub struct ExpressionStatement {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]    --> src/ast.rs:136:10
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub enum Expression {
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Identifier` is never constructed
[INFO] [stdout]    --> src/ast.rs:158:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | pub struct Identifier {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/ast.rs:164:8
[INFO] [stdout]     |
[INFO] [stdout] 163 | impl Identifier {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 164 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IntegerLiteral` is never constructed
[INFO] [stdout]    --> src/ast.rs:183:12
[INFO] [stdout]     |
[INFO] [stdout] 183 | pub struct IntegerLiteral {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Operator` is never used
[INFO] [stdout]   --> src/parser.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Operator {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Parser<'a> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/parser.rs:30:12
[INFO] [stdout]     |
[INFO] [stdout]  29 | impl Parser<'_> {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout]  30 |     pub fn new(l: Lexer) -> Parser {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  44 |     fn errors(&self) -> &Vec<String> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  48 |     fn peek_error(&self, t: TokenType) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  55 |     fn next_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  59 |     fn parse_program(&mut self) -> Program {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  72 |     fn parse_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  80 |     fn parse_let_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     fn parse_return_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn parse_expression_statement(&mut self) -> Option<Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 129 |     fn parse_expression(&mut self, precedence: usize) -> Option<Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 137 |     fn parse_identifier(&self) -> Option<Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     fn parese_integer_literal(&mut self) -> Option<Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 164 |     fn cur_token_is(&self, t: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     fn peek_token_is(&self, t: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn expect_peek(&mut self, t: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:18:23
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                       ^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]    --> src/parser.rs:129:36
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn parse_expression(&mut self, precedence: usize) -> Option<Expression> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `token_literal` is never used
[INFO] [stdout]   --> src/ast.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Program {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn token_literal(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Equals`, `LessGrater`, `Sum`, `Product`, `Prefix`, and `Call` are never constructed
[INFO] [stdout]   --> src/parser.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Operator {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 11 |     Lowest,
[INFO] [stdout] 12 |     Equals,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 13 |     LessGrater,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 14 |     Sum,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     Product,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 16 |     Prefix,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     Call,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:18:23
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                       ^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "9a0a4eeae93107f3d2da68c69bbff05caa05e83116f8a4f423636ec5720d25c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a0a4eeae93107f3d2da68c69bbff05caa05e83116f8a4f423636ec5720d25c2", kill_on_drop: false }`
[INFO] [stdout] 9a0a4eeae93107f3d2da68c69bbff05caa05e83116f8a4f423636ec5720d25c2