[INFO] cloning repository https://github.com/Sayama0310/toy_regexp_engin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sayama0310/toy_regexp_engin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSayama0310%2Ftoy_regexp_engin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSayama0310%2Ftoy_regexp_engin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a78b03b43e3f617c81a8d275a7add8ee5f464401
[INFO] testing Sayama0310/toy_regexp_engin against master#160e7623e8cbbf1feab2b6e2a24733a98c7bde9c for pr-145628-retry-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSayama0310%2Ftoy_regexp_engin" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Sayama0310/toy_regexp_engin
[INFO] finished tweaking git repo https://github.com/Sayama0310/toy_regexp_engin
[INFO] tweaked toml for git repo https://github.com/Sayama0310/toy_regexp_engin written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Sayama0310/toy_regexp_engin on toolchain 160e7623e8cbbf1feab2b6e2a24733a98c7bde9c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Sayama0310/toy_regexp_engin 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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5b561db23a2be1db1fb4c70fdcfef152b594e14a051d03cc2daa8cc08faa4cb
[INFO] running `Command { std: "docker" "start" "-a" "a5b561db23a2be1db1fb4c70fdcfef152b594e14a051d03cc2daa8cc08faa4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5b561db23a2be1db1fb4c70fdcfef152b594e14a051d03cc2daa8cc08faa4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5b561db23a2be1db1fb4c70fdcfef152b594e14a051d03cc2daa8cc08faa4cb", kill_on_drop: false }`
[INFO] [stdout] a5b561db23a2be1db1fb4c70fdcfef152b594e14a051d03cc2daa8cc08faa4cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8406ebadc4d72d7708c9beb14f525ed7624d6277fb0f5fa5d8b0077e5510efbc
[INFO] running `Command { std: "docker" "start" "-a" "8406ebadc4d72d7708c9beb14f525ed7624d6277fb0f5fa5d8b0077e5510efbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling toy_regexp_engin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ast`
[INFO] [stdout]   --> src/engine/compiler.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn compile(&mut self, ast: &AST) -> Result<Vec<Instruction>, CompileError> {
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_ast`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `chars` is never read
[INFO] [stdout]   --> src/engine/parser.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Parser<'a> {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 35 |     chars: std::iter::Peekable<std::str::Chars<'a>>,
[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 `Concat`, `Union`, `Star`, `Plus`, `Question`, and `Char` are never constructed
[INFO] [stdout]   --> src/engine/parser.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub enum AST {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] 54 |     Concat(Vec<AST>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 55 |     Union(Vec<AST>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 56 |     Star(Box<AST>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 57 |     Plus(Box<AST>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 58 |     Question(Box<AST>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 59 |     Char(char),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AST` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnexpectedCharacter` is never constructed
[INFO] [stdout]   --> src/engine/parser.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub enum ParseError {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 66 |     UnexpectedCharacter(char),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `instructions` is never read
[INFO] [stdout]   --> src/engine/compiler.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Compiler {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 13 |     instructions: Vec<Instruction>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Char`, `Match`, `Jump`, and `Split` are never constructed
[INFO] [stdout]   --> src/engine/compiler.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub enum Instruction {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] 32 |     Char(char),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Match,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     Jump(usize),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 35 |     Split(usize, usize),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unimplemented` is never constructed
[INFO] [stdout]   --> src/engine/compiler.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub enum CompileError {
[INFO] [stdout]    |          ------------ variant in this enum
[INFO] [stdout] 41 |     Unimplemented,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompileError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instructions`, `line`, `pc`, `sp`, and `context` are never read
[INFO] [stdout]   --> src/engine/evaluator.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Evaluator {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 13 |     instructions: Vec<Instruction>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 14 |     line: Vec<char>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     pc: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 16 |     sp: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 17 |     context: Vec<(usize, usize)>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unimplemented` is never constructed
[INFO] [stdout]   --> src/engine/evaluator.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub enum EvaluateError {
[INFO] [stdout]    |          ------------- variant in this enum
[INFO] [stdout] 40 |     Unimplemented,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EvaluateError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/engine/parser.rs:39:20
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn new(regexp: &str) -> Parser {
[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] 39 |     fn new(regexp: &str) -> Parser<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "8406ebadc4d72d7708c9beb14f525ed7624d6277fb0f5fa5d8b0077e5510efbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8406ebadc4d72d7708c9beb14f525ed7624d6277fb0f5fa5d8b0077e5510efbc", kill_on_drop: false }`
[INFO] [stdout] 8406ebadc4d72d7708c9beb14f525ed7624d6277fb0f5fa5d8b0077e5510efbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] debcd8857579b748eb26986ad934aad6d43e9f53055bbf3b131a53e877c3fae9
[INFO] running `Command { std: "docker" "start" "-a" "debcd8857579b748eb26986ad934aad6d43e9f53055bbf3b131a53e877c3fae9", kill_on_drop: false }`
[INFO] [stderr]    Compiling toy_regexp_engin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ast`
[INFO] [stdout]   --> src/engine/compiler.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn compile(&mut self, ast: &AST) -> Result<Vec<Instruction>, CompileError> {
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_ast`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `chars` is never read
[INFO] [stdout]   --> src/engine/parser.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Parser<'a> {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 35 |     chars: std::iter::Peekable<std::str::Chars<'a>>,
[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 `Concat`, `Union`, `Star`, `Plus`, `Question`, and `Char` are never constructed
[INFO] [stdout]   --> src/engine/parser.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub enum AST {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] 54 |     Concat(Vec<AST>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 55 |     Union(Vec<AST>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 56 |     Star(Box<AST>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 57 |     Plus(Box<AST>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 58 |     Question(Box<AST>),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 59 |     Char(char),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AST` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `UnexpectedCharacter` is never constructed
[INFO] [stdout]   --> src/engine/parser.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub enum ParseError {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 66 |     UnexpectedCharacter(char),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `instructions` is never read
[INFO] [stdout]   --> src/engine/compiler.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Compiler {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 13 |     instructions: Vec<Instruction>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Char`, `Match`, `Jump`, and `Split` are never constructed
[INFO] [stdout]   --> src/engine/compiler.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub enum Instruction {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] 32 |     Char(char),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Match,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     Jump(usize),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 35 |     Split(usize, usize),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unimplemented` is never constructed
[INFO] [stdout]   --> src/engine/compiler.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub enum CompileError {
[INFO] [stdout]    |          ------------ variant in this enum
[INFO] [stdout] 41 |     Unimplemented,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompileError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instructions`, `line`, `pc`, `sp`, and `context` are never read
[INFO] [stdout]   --> src/engine/evaluator.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Evaluator {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 13 |     instructions: Vec<Instruction>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 14 |     line: Vec<char>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     pc: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 16 |     sp: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 17 |     context: Vec<(usize, usize)>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unimplemented` is never constructed
[INFO] [stdout]   --> src/engine/evaluator.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub enum EvaluateError {
[INFO] [stdout]    |          ------------- variant in this enum
[INFO] [stdout] 40 |     Unimplemented,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EvaluateError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/engine/parser.rs:39:20
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn new(regexp: &str) -> Parser {
[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] 39 |     fn new(regexp: &str) -> Parser<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "debcd8857579b748eb26986ad934aad6d43e9f53055bbf3b131a53e877c3fae9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "debcd8857579b748eb26986ad934aad6d43e9f53055bbf3b131a53e877c3fae9", kill_on_drop: false }`
[INFO] [stdout] debcd8857579b748eb26986ad934aad6d43e9f53055bbf3b131a53e877c3fae9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4b9e3be4b84860eedd2b0c692d442c9f98d8d72f8bf2cb30688317988448f983
[INFO] running `Command { std: "docker" "start" "-a" "4b9e3be4b84860eedd2b0c692d442c9f98d8d72f8bf2cb30688317988448f983", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `ast`
[INFO] [stderr]   --> src/engine/compiler.rs:23:27
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn compile(&mut self, ast: &AST) -> Result<Vec<Instruction>, CompileError> {
[INFO] [stderr]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_ast`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `chars` is never read
[INFO] [stderr]   --> src/engine/parser.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct Parser<'a> {
[INFO] [stderr]    |        ------ field in this struct
[INFO] [stderr] 35 |     chars: std::iter::Peekable<std::str::Chars<'a>>,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Concat`, `Union`, `Star`, `Plus`, `Question`, and `Char` are never constructed
[INFO] [stderr]   --> src/engine/parser.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub enum AST {
[INFO] [stderr]    |          --- variants in this enum
[INFO] [stderr] 54 |     Concat(Vec<AST>),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 55 |     Union(Vec<AST>),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 56 |     Star(Box<AST>),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 57 |     Plus(Box<AST>),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 58 |     Question(Box<AST>),
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 59 |     Char(char),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `AST` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variant `UnexpectedCharacter` is never constructed
[INFO] [stderr]   --> src/engine/parser.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 65 | pub enum ParseError {
[INFO] [stderr]    |          ---------- variant in this enum
[INFO] [stderr] 66 |     UnexpectedCharacter(char),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `instructions` is never read
[INFO] [stderr]   --> src/engine/compiler.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct Compiler {
[INFO] [stderr]    |        -------- field in this struct
[INFO] [stderr] 13 |     instructions: Vec<Instruction>,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Char`, `Match`, `Jump`, and `Split` are never constructed
[INFO] [stderr]   --> src/engine/compiler.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub enum Instruction {
[INFO] [stderr]    |          ----------- variants in this enum
[INFO] [stderr] 32 |     Char(char),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 33 |     Match,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 34 |     Jump(usize),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 35 |     Split(usize, usize),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Instruction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Unimplemented` is never constructed
[INFO] [stderr]   --> src/engine/compiler.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub enum CompileError {
[INFO] [stderr]    |          ------------ variant in this enum
[INFO] [stderr] 41 |     Unimplemented,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `CompileError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `instructions`, `line`, `pc`, `sp`, and `context` are never read
[INFO] [stderr]   --> src/engine/evaluator.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct Evaluator {
[INFO] [stderr]    |        --------- fields in this struct
[INFO] [stderr] 13 |     instructions: Vec<Instruction>,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 14 |     line: Vec<char>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 15 |     pc: usize,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 16 |     sp: usize,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 17 |     context: Vec<(usize, usize)>,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Unimplemented` is never constructed
[INFO] [stderr]   --> src/engine/evaluator.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub enum EvaluateError {
[INFO] [stderr]    |          ------------- variant in this enum
[INFO] [stderr] 40 |     Unimplemented,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `EvaluateError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/engine/parser.rs:39:20
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn new(regexp: &str) -> Parser {
[INFO] [stderr]    |                    ^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                    |
[INFO] [stderr]    |                    the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn new(regexp: &str) -> Parser<'_> {
[INFO] [stderr]    |                                   ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `toy_regexp_engin` (bin "toy_regexp_engin" test) generated 10 warnings (run `cargo fix --bin "toy_regexp_engin" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/toy_regexp_engin-8161cbcbe00cdd10)
[INFO] [stdout] 
[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" "4b9e3be4b84860eedd2b0c692d442c9f98d8d72f8bf2cb30688317988448f983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b9e3be4b84860eedd2b0c692d442c9f98d8d72f8bf2cb30688317988448f983", kill_on_drop: false }`
[INFO] [stdout] 4b9e3be4b84860eedd2b0c692d442c9f98d8d72f8bf2cb30688317988448f983