[INFO] cloning repository https://github.com/kapifuji/go_interpreter_by_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kapifuji/go_interpreter_by_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkapifuji%2Fgo_interpreter_by_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkapifuji%2Fgo_interpreter_by_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fe70544cdee94a7be070710f3a1684edb8cba1d
[INFO] checking kapifuji/go_interpreter_by_rust against master#419b3e2d3e350822550eee0e82eeded4d324d584 for pr-135536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkapifuji%2Fgo_interpreter_by_rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kapifuji/go_interpreter_by_rust on toolchain 419b3e2d3e350822550eee0e82eeded4d324d584
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kapifuji/go_interpreter_by_rust
[INFO] finished tweaking git repo https://github.com/kapifuji/go_interpreter_by_rust
[INFO] tweaked toml for git repo https://github.com/kapifuji/go_interpreter_by_rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kapifuji/go_interpreter_by_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" "+419b3e2d3e350822550eee0e82eeded4d324d584" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c06b9d396833e71202098ba539e7cff1d2de1a863fd6cd10a89133ad8353eb67
[INFO] running `Command { std: "docker" "start" "-a" "c06b9d396833e71202098ba539e7cff1d2de1a863fd6cd10a89133ad8353eb67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c06b9d396833e71202098ba539e7cff1d2de1a863fd6cd10a89133ad8353eb67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c06b9d396833e71202098ba539e7cff1d2de1a863fd6cd10a89133ad8353eb67", kill_on_drop: false }`
[INFO] [stdout] c06b9d396833e71202098ba539e7cff1d2de1a863fd6cd10a89133ad8353eb67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa30d14b3c84116f6885df237564f51702d44755724f42f60b32a7ed123d00a3
[INFO] running `Command { std: "docker" "start" "-a" "aa30d14b3c84116f6885df237564f51702d44755724f42f60b32a7ed123d00a3", kill_on_drop: false }`
[INFO] [stderr]     Checking go_interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/evaluator.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |             _ => Ok(object::Object::Null),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/evaluator.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             ast::Statement::Let { identifier, value } => {
[INFO] [stdout]    |             ----------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 56 |             ast::Statement::Return(expression) => {
[INFO] [stdout]    |             ---------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 60 |             ast::Statement::Expression(expression) => Evaluator::eval_expression(expression, env),
[INFO] [stdout]    |             -------------------------------------- matches some of the same values
[INFO] [stdout] 61 |             ast::Statement::Block(statements) => Evaluator::eval_statements(statements, false, env),
[INFO] [stdout]    |             --------------------------------- matches some of the same values
[INFO] [stdout] 62 |             _ => Ok(object::Object::Null),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:254:9
[INFO] [stdout]     |
[INFO] [stdout] 254 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:265:9
[INFO] [stdout]     |
[INFO] [stdout] 265 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/evaluator.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |             _ => Ok(object::Object::Null),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/evaluator.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             ast::Statement::Let { identifier, value } => {
[INFO] [stdout]    |             ----------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 56 |             ast::Statement::Return(expression) => {
[INFO] [stdout]    |             ---------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 60 |             ast::Statement::Expression(expression) => Evaluator::eval_expression(expression, env),
[INFO] [stdout]    |             -------------------------------------- matches some of the same values
[INFO] [stdout] 61 |             ast::Statement::Block(statements) => Evaluator::eval_statements(statements, false, env),
[INFO] [stdout]    |             --------------------------------- matches some of the same values
[INFO] [stdout] 62 |             _ => Ok(object::Object::Null),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:254:9
[INFO] [stdout]     |
[INFO] [stdout] 254 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]    --> src/evaluator.rs:265:9
[INFO] [stdout]     |
[INFO] [stdout] 265 |         env: &mut Rc<RefCell<environment::Environment>>,
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "aa30d14b3c84116f6885df237564f51702d44755724f42f60b32a7ed123d00a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa30d14b3c84116f6885df237564f51702d44755724f42f60b32a7ed123d00a3", kill_on_drop: false }`
[INFO] [stdout] aa30d14b3c84116f6885df237564f51702d44755724f42f60b32a7ed123d00a3