[INFO] cloning repository https://github.com/kenyontu/writing-an-interpreter-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kenyontu/writing-an-interpreter-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenyontu%2Fwriting-an-interpreter-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenyontu%2Fwriting-an-interpreter-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 899ee8c73fc63bada11925c4004f3266c6b80ede
[INFO] testing kenyontu/writing-an-interpreter-book against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkenyontu%2Fwriting-an-interpreter-book" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kenyontu/writing-an-interpreter-book
[INFO] finished tweaking git repo https://github.com/kenyontu/writing-an-interpreter-book
[INFO] tweaked toml for git repo https://github.com/kenyontu/writing-an-interpreter-book written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kenyontu/writing-an-interpreter-book on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kenyontu/writing-an-interpreter-book 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 246716f758421faefc08d1646661c58a95c1024d6e5ed63da264003a68d1b40e
[INFO] running `Command { std: "docker" "start" "-a" "246716f758421faefc08d1646661c58a95c1024d6e5ed63da264003a68d1b40e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "246716f758421faefc08d1646661c58a95c1024d6e5ed63da264003a68d1b40e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "246716f758421faefc08d1646661c58a95c1024d6e5ed63da264003a68d1b40e", kill_on_drop: false }`
[INFO] [stdout] 246716f758421faefc08d1646661c58a95c1024d6e5ed63da264003a68d1b40e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 380160b87b235fb04dc2dc788acbe12df443ae6e587ee3dbfd0a4a5dabe5c3a4
[INFO] running `Command { std: "docker" "start" "-a" "380160b87b235fb04dc2dc788acbe12df443ae6e587ee3dbfd0a4a5dabe5c3a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling writing-an-interpreter-book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `TokenType` and `Token`
[INFO] [stdout]    --> src/ast/mod.rs:102:24
[INFO] [stdout]     |
[INFO] [stdout] 102 |     use crate::token::{Token, TokenType};
[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: `super::*`
[INFO] [stdout]    --> src/ast/mod.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `NodeTrait` is never used
[INFO] [stdout]  --> src/ast/mod.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub trait NodeTrait: Display {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `StatementTrait` is never used
[INFO] [stdout]   --> src/ast/mod.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait StatementTrait: NodeTrait {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExpressionTrait` is never used
[INFO] [stdout]   --> src/ast/mod.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub trait ExpressionTrait: NodeTrait {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Statement` is never used
[INFO] [stdout]   --> src/ast/mod.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub enum Statement {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `token_literal` is never used
[INFO] [stdout]   --> src/ast/mod.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Statement {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 29 |     pub fn token_literal(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]   --> src/ast/mod.rs:50:10
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub enum Expression {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Program` is never constructed
[INFO] [stdout]   --> src/ast/mod.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct Program {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ast/mod.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl Program {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 74 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IdentExpression` is never constructed
[INFO] [stdout]  --> src/ast/expressions/ident_expression.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct IdentExpression {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InfixExpression` is never constructed
[INFO] [stdout]  --> src/ast/expressions/infix_expression.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct InfixExpression {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IntegerLiteral` is never constructed
[INFO] [stdout]  --> src/ast/expressions/integer_expression.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct IntegerLiteral {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrefixExpression` is never constructed
[INFO] [stdout]  --> src/ast/expressions/prefix_expression.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct PrefixExpression {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExpressionStatement` is never constructed
[INFO] [stdout]  --> src/ast/statements/expression_statement.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct ExpressionStatement {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LetStatement` is never constructed
[INFO] [stdout]  --> src/ast/statements/let_statement.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct LetStatement {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ReturnStatement` is never constructed
[INFO] [stdout]  --> src/ast/statements/return_statement.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct ReturnStatement {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Precedence` is never used
[INFO] [stdout]   --> src/parser.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub enum Precedence {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/parser.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Precedence {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 34 |     /// Returns the precedence value of each variant
[INFO] [stdout] 35 |     pub fn value(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Parser<'a> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/parser.rs:59:12
[INFO] [stdout]     |
[INFO] [stdout]  58 | impl<'a> Parser<'a> {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout]  59 |     pub fn new(lexer: Lexer<'a>) -> Parser<'a> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  73 |     pub fn parse_program(&mut self) -> ast::Program {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  88 |     pub fn errors(&self) -> &Vec<String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  93 |     fn next_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     fn cur_token_is(&self, token_type: &TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 105 |     fn cur_precedence(&self) -> Precedence {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     fn peek_token_is(&self, token_type: &TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     fn peek_error(&mut self, token_type: &TokenType) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn peek_precedence(&self) -> Precedence {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |     fn expect_peek(&mut self, token_type: &TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 138 |     fn parse_statement(&mut self) -> Option<ast::Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn parse_let_statement(&mut self) -> Option<ast::Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 182 |     fn parse_return_statement(&mut self) -> Option<ast::Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 207 |     fn parse_identifier(&self) -> Option<ast::Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 217 |     fn parse_integer_literal(&mut self) -> Option<ast::Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 238 |     fn parse_prefix_expression(&mut self) -> Option<ast::Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 253 |     fn prefix_parse(&mut self) -> Option<ast::Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 263 |     fn parse_infix_expression(&mut self, left: ast::Expression) -> Option<ast::Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 281 |     fn parse_expression_statement(&mut self) -> Option<ast::Statement> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 296 |     fn parse_expression(&mut self, precedence: usize) -> Option<ast::Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_literal`, `precedence`, and `is_infix` are never used
[INFO] [stdout]   --> src/token.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl TokenType {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 35 |     pub fn get_literal(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub fn precedence(&self) -> Precedence {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     pub fn is_infix(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `literal` is never read
[INFO] [stdout]   --> src/token.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub struct Token {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 87 |     pub token_type: TokenType,
[INFO] [stdout] 88 |     pub literal: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "380160b87b235fb04dc2dc788acbe12df443ae6e587ee3dbfd0a4a5dabe5c3a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "380160b87b235fb04dc2dc788acbe12df443ae6e587ee3dbfd0a4a5dabe5c3a4", kill_on_drop: false }`
[INFO] [stdout] 380160b87b235fb04dc2dc788acbe12df443ae6e587ee3dbfd0a4a5dabe5c3a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e51530660427e7c7e76df65bc2ef2f4cd7b6135e89da8465b35bd2cb4bbce2a
[INFO] running `Command { std: "docker" "start" "-a" "3e51530660427e7c7e76df65bc2ef2f4cd7b6135e89da8465b35bd2cb4bbce2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling writing-an-interpreter-book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `StatementTrait` is never used
[INFO] [stdout]   --> src/ast/mod.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait StatementTrait: NodeTrait {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExpressionTrait` is never used
[INFO] [stdout]   --> src/ast/mod.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub trait ExpressionTrait: NodeTrait {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Call` is never constructed
[INFO] [stdout]   --> src/parser.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub enum Precedence {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 30 |     Call,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "3e51530660427e7c7e76df65bc2ef2f4cd7b6135e89da8465b35bd2cb4bbce2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e51530660427e7c7e76df65bc2ef2f4cd7b6135e89da8465b35bd2cb4bbce2a", kill_on_drop: false }`
[INFO] [stdout] 3e51530660427e7c7e76df65bc2ef2f4cd7b6135e89da8465b35bd2cb4bbce2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 52c0be17d014e974fb05461089e311b3edb64f74d1b92ecc128821713b3b37b8
[INFO] running `Command { std: "docker" "start" "-a" "52c0be17d014e974fb05461089e311b3edb64f74d1b92ecc128821713b3b37b8", kill_on_drop: false }`
[INFO] [stderr] warning: trait `StatementTrait` is never used
[INFO] [stderr]   --> src/ast/mod.rs:14:11
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub trait StatementTrait: NodeTrait {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `ExpressionTrait` is never used
[INFO] [stderr]   --> src/ast/mod.rs:18:11
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub trait ExpressionTrait: NodeTrait {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Call` is never constructed
[INFO] [stderr]   --> src/parser.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub enum Precedence {
[INFO] [stderr]    |          ---------- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 30 |     Call,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `writing-an-interpreter-book` (bin "writing-an-interpreter-book" test) generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/writing_an_interpreter_book-32814fc75dc40e82)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test ast::tests::test_to_string ... ok
[INFO] [stdout] test parser::tests::test_identifier_expression ... ok
[INFO] [stdout] test parser::tests::test_integer_literal_expression ... ok
[INFO] [stdout] test parser::tests::test_parsing_prefix_expressions ... ok
[INFO] [stdout] test parser::tests::test_let_statements ... ok
[INFO] [stdout] test parser::tests::test_parsing_infix_expressions ... ok
[INFO] [stdout] test parser::tests::test_return_statements ... ok
[INFO] [stdout] test parser::tests::test_operator_precedence_parsing ... ok
[INFO] [stdout] test lexer::tests::test_next_token ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "52c0be17d014e974fb05461089e311b3edb64f74d1b92ecc128821713b3b37b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52c0be17d014e974fb05461089e311b3edb64f74d1b92ecc128821713b3b37b8", kill_on_drop: false }`
[INFO] [stdout] 52c0be17d014e974fb05461089e311b3edb64f74d1b92ecc128821713b3b37b8