[INFO] fetching crate lua_engine 0.1.1...
[INFO] checking lua_engine-0.1.1 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate lua_engine 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate lua_engine 0.1.1 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lua_engine 0.1.1
[INFO] finished tweaking crates.io crate lua_engine 0.1.1
[INFO] tweaked toml for crates.io crate lua_engine 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lua_engine_macros v0.1.0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80dede7134e84243fbf1f681e093272cb7554de4d5b430b5f4eb690afa10e27a
[INFO] running `Command { std: "docker" "start" "-a" "80dede7134e84243fbf1f681e093272cb7554de4d5b430b5f4eb690afa10e27a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80dede7134e84243fbf1f681e093272cb7554de4d5b430b5f4eb690afa10e27a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80dede7134e84243fbf1f681e093272cb7554de4d5b430b5f4eb690afa10e27a", kill_on_drop: false }`
[INFO] [stdout] 80dede7134e84243fbf1f681e093272cb7554de4d5b430b5f4eb690afa10e27a
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a10bcb34ec83aa9599ea8cd10a964aa4ba192106ddfef4c50957b74cab19b9c5
[INFO] running `Command { std: "docker" "start" "-a" "a10bcb34ec83aa9599ea8cd10a964aa4ba192106ddfef4c50957b74cab19b9c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]    Compiling lua_engine_macros v0.1.0
[INFO] [stderr]     Checking lua_engine v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ret`
[INFO] [stdout]    --> src/parsing/parser.rs:749:13
[INFO] [stdout]     |
[INFO] [stdout] 749 |         let ret = stmt.as_any().downcast_ref::<ReturnStatement>().unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/parsing/lexer.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 111 | impl Token {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 112 |     // used for testing
[INFO] [stdout] 113 |     fn new(token_type: TokenType, literal: String) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "a10bcb34ec83aa9599ea8cd10a964aa4ba192106ddfef4c50957b74cab19b9c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a10bcb34ec83aa9599ea8cd10a964aa4ba192106ddfef4c50957b74cab19b9c5", kill_on_drop: false }`
[INFO] [stdout] a10bcb34ec83aa9599ea8cd10a964aa4ba192106ddfef4c50957b74cab19b9c5