[INFO] cloning repository https://github.com/letieu/rust-lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/letieu/rust-lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletieu%2Frust-lox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletieu%2Frust-lox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2cd2e1c9d80ff636d0ee2a25d5eed8b45c6cb64
[INFO] checking letieu/rust-lox against master#f21fbac535ab2c3bc50db20547f4d48477357103 for pr-143193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletieu%2Frust-lox" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/letieu/rust-lox
[INFO] finished tweaking git repo https://github.com/letieu/rust-lox
[INFO] tweaked toml for git repo https://github.com/letieu/rust-lox written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/letieu/rust-lox on toolchain f21fbac535ab2c3bc50db20547f4d48477357103
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/letieu/rust-lox 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" "+f21fbac535ab2c3bc50db20547f4d48477357103" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2279cc4b02363118e6c6ed1f92afa249a712036b78d6098c90cff28803380587
[INFO] running `Command { std: "docker" "start" "-a" "2279cc4b02363118e6c6ed1f92afa249a712036b78d6098c90cff28803380587", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2279cc4b02363118e6c6ed1f92afa249a712036b78d6098c90cff28803380587", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2279cc4b02363118e6c6ed1f92afa249a712036b78d6098c90cff28803380587", kill_on_drop: false }`
[INFO] [stdout] 2279cc4b02363118e6c6ed1f92afa249a712036b78d6098c90cff28803380587
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0792b4067777a053323c4270e3dabeabae8c9388a2fd21a90d9c9a12c1b3f98
[INFO] running `Command { std: "docker" "start" "-a" "d0792b4067777a053323c4270e3dabeabae8c9388a2fd21a90d9c9a12c1b3f98", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `token_type`, `lexeme`, `literal`, and `line` are never read
[INFO] [stdout]  --> src/token.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Token {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     pub token_type: TokenType,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 6 |     pub lexeme: String,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 7 |     pub literal: Option<String>,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 8 |     pub line: usize,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `token_type`, `lexeme`, `literal`, and `line` are never read
[INFO] [stdout]  --> src/token.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Token {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     pub token_type: TokenType,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 6 |     pub lexeme: String,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 7 |     pub literal: Option<String>,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 8 |     pub line: usize,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "d0792b4067777a053323c4270e3dabeabae8c9388a2fd21a90d9c9a12c1b3f98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0792b4067777a053323c4270e3dabeabae8c9388a2fd21a90d9c9a12c1b3f98", kill_on_drop: false }`
[INFO] [stdout] d0792b4067777a053323c4270e3dabeabae8c9388a2fd21a90d9c9a12c1b3f98