[INFO] fetching crate rubylang 0.1.4...
[INFO] checking rubylang-0.1.4 against 65b20a97de33e9e59992793a144aef2950c48c76 for pr-154715
[INFO] extracting crate rubylang 0.1.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rubylang 0.1.4
[INFO] finished tweaking crates.io crate rubylang 0.1.4
[INFO] tweaked toml for crates.io crate rubylang 0.1.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rubylang 0.1.4 on toolchain 65b20a97de33e9e59992793a144aef2950c48c76
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rubylang 0.1.4 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" "+65b20a97de33e9e59992793a144aef2950c48c76" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f
[INFO] running `Command { std: "docker" "start" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f" "/opt/rustwide/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f" "/opt/rustwide/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling cranelift-srcgen v0.130.2
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[INFO] [stderr]     Checking rubylang v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `recv`
[INFO] [stdout]      --> src/builtins.rs:11993:5
[INFO] [stdout]       |
[INFO] [stdout] 11993 |     recv: &Value,
[INFO] [stdout]       |     ^^^^ help: if this is intentional, prefix it with an underscore: `_recv`
[INFO] [stdout]       |
[INFO] [stdout]       = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `recv`
[INFO] [stdout]      --> src/builtins.rs:11993:5
[INFO] [stdout]       |
[INFO] [stdout] 11993 |     recv: &Value,
[INFO] [stdout]       |     ^^^^ help: if this is intentional, prefix it with an underscore: `_recv`
[INFO] [stdout]       |
[INFO] [stdout]       = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/compiler.rs:2212:13
[INFO] [stdout]      |
[INFO] [stdout] 2212 |         let mut includes: Vec<String> = Vec::new();
[INFO] [stdout]      |             ----^^^^^^^^
[INFO] [stdout]      |             |
[INFO] [stdout]      |             help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/compiler.rs:2212:13
[INFO] [stdout]      |
[INFO] [stdout] 2212 |         let mut includes: Vec<String> = Vec::new();
[INFO] [stdout]      |             ----^^^^^^^^
[INFO] [stdout]      |             |
[INFO] [stdout]      |             help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PROGRAM` is never used
[INFO] [stdout]    --> src/tiers.rs:276:7
[INFO] [stdout]     |
[INFO] [stdout] 276 | const PROGRAM: &str = "def f(n)\n  t = 0\n  i = 0\n  while i < n\n    t += i\n    i += 1\n  end\n  t\nend\nf(200000)\n";
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 15s
[INFO] running `Command { std: "docker" "inspect" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f", kill_on_drop: false }`
[INFO] [stdout] b205aeb07a189db14e3cd8b2b8be7177555293c7c93a1806771bf7b24a91612f
