[INFO] cloning repository https://github.com/adtok/lox-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adtok/lox-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadtok%2Flox-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadtok%2Flox-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5c0c0a937c9b7d2bea55df665a4e1a208932130
[INFO] checking adtok/lox-rust/a5c0c0a937c9b7d2bea55df665a4e1a208932130 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadtok%2Flox-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/adtok/lox-rust on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/adtok/lox-rust
[INFO] finished tweaking git repo https://github.com/adtok/lox-rust
[INFO] tweaked toml for git repo https://github.com/adtok/lox-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/adtok/lox-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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed316d0ea83f1f644a28678829c415e95bc995c44b7082e64b96a4bd37530d31
[INFO] running `Command { std: "docker" "start" "-a" "ed316d0ea83f1f644a28678829c415e95bc995c44b7082e64b96a4bd37530d31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed316d0ea83f1f644a28678829c415e95bc995c44b7082e64b96a4bd37530d31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed316d0ea83f1f644a28678829c415e95bc995c44b7082e64b96a4bd37530d31", kill_on_drop: false }`
[INFO] [stdout] ed316d0ea83f1f644a28678829c415e95bc995c44b7082e64b96a4bd37530d31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c36b0830a00dd4304db2e230fe3f0a3d59c774df8052f1c29099b0d1c815a0d5
[INFO] running `Command { std: "docker" "start" "-a" "c36b0830a00dd4304db2e230fe3f0a3d59c774df8052f1c29099b0d1c815a0d5", kill_on_drop: false }`
[INFO] [stderr]     Checking lox-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `paren` is never read
[INFO] [stdout]    --> src/expression.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     Call {
[INFO] [stdout]     |     ---- field in this variant
[INFO] [stdout] 125 |         callee: Box<Expr>,
[INFO] [stdout] 126 |         paren: Token,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `globals` is never read
[INFO] [stdout]  --> src/interpreter.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Interpreter {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 8 |     pub lambda_counter: usize,
[INFO] [stdout] 9 |     pub globals: Environment,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `keyword` is never read
[INFO] [stdout]   --> src/statement.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Return {
[INFO] [stdout]    |     ------ field in this variant
[INFO] [stdout] 26 |         keyword: Token,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stmt` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `paren` is never read
[INFO] [stdout]    --> src/expression.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     Call {
[INFO] [stdout]     |     ---- field in this variant
[INFO] [stdout] 125 |         callee: Box<Expr>,
[INFO] [stdout] 126 |         paren: Token,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `globals` is never read
[INFO] [stdout]  --> src/interpreter.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Interpreter {
[INFO] [stdout]   |            ----------- field in this struct
[INFO] [stdout] 8 |     pub lambda_counter: usize,
[INFO] [stdout] 9 |     pub globals: Environment,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `keyword` is never read
[INFO] [stdout]   --> src/statement.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Return {
[INFO] [stdout]    |     ------ field in this variant
[INFO] [stdout] 26 |         keyword: Token,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stmt` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> src/tests/mod.rs:49:32
[INFO] [stdout]    |
[INFO] [stdout] 49 |             test_code.push(line.clone());
[INFO] [stdout]    |                                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "c36b0830a00dd4304db2e230fe3f0a3d59c774df8052f1c29099b0d1c815a0d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c36b0830a00dd4304db2e230fe3f0a3d59c774df8052f1c29099b0d1c815a0d5", kill_on_drop: false }`
[INFO] [stdout] c36b0830a00dd4304db2e230fe3f0a3d59c774df8052f1c29099b0d1c815a0d5