[INFO] cloning repository https://github.com/madisonbullard/specta-serde-bug
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/madisonbullard/specta-serde-bug" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadisonbullard%2Fspecta-serde-bug", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadisonbullard%2Fspecta-serde-bug'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c97c71a29d8e99a9e60c45f71b91774549285fd2
[INFO] checking madisonbullard/specta-serde-bug against master#336209eef13882bd1e211b24779584cb7ef911eb for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadisonbullard%2Fspecta-serde-bug" "/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/madisonbullard/specta-serde-bug on toolchain 336209eef13882bd1e211b24779584cb7ef911eb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/madisonbullard/specta-serde-bug
[INFO] finished tweaking git repo https://github.com/madisonbullard/specta-serde-bug
[INFO] tweaked toml for git repo https://github.com/madisonbullard/specta-serde-bug written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/madisonbullard/specta-serde-bug 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" "+336209eef13882bd1e211b24779584cb7ef911eb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded specta-serde v0.0.7
[INFO] [stderr]   Downloaded specta v2.0.0-rc.20
[INFO] [stderr]   Downloaded specta-macros v2.0.0-rc.17
[INFO] [stderr]   Downloaded specta-typescript v0.0.7
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b2781155d76cb2d0bc141a7c7a81cbe08afd5b7eba1359b1585683b0f65eaac
[INFO] running `Command { std: "docker" "start" "-a" "3b2781155d76cb2d0bc141a7c7a81cbe08afd5b7eba1359b1585683b0f65eaac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b2781155d76cb2d0bc141a7c7a81cbe08afd5b7eba1359b1585683b0f65eaac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b2781155d76cb2d0bc141a7c7a81cbe08afd5b7eba1359b1585683b0f65eaac", kill_on_drop: false }`
[INFO] [stdout] 3b2781155d76cb2d0bc141a7c7a81cbe08afd5b7eba1359b1585683b0f65eaac
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 565380e5b1b43410cbdac00fdeb0e7dccbb3febea39dd50a76e677dd440ef2cd
[INFO] running `Command { std: "docker" "start" "-a" "565380e5b1b43410cbdac00fdeb0e7dccbb3febea39dd50a76e677dd440ef2cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling thiserror v2.0.3
[INFO] [stderr]    Compiling serde v1.0.215
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling specta-macros v2.0.0-rc.17
[INFO] [stderr]    Compiling serde_derive v1.0.215
[INFO] [stderr]    Compiling thiserror-impl v2.0.3
[INFO] [stderr]     Checking specta v2.0.0-rc.20
[INFO] [stderr]     Checking specta-serde v0.0.7
[INFO] [stderr]     Checking specta-typescript v0.0.7
[INFO] [stderr]     Checking specta-bug-report v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Io` and `Utf8` are never constructed
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Error {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 3 |     #[error("io error: {0}")]
[INFO] [stdout] 4 |     Io(String),
[INFO] [stdout]   |     ^^
[INFO] [stdout] 5 |     #[error("failed to parse as string: {0}")]
[INFO] [stdout] 6 |     Utf8(String),
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` 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: variants `Io` and `Utf8` are never constructed
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Error {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 3 |     #[error("io error: {0}")]
[INFO] [stdout] 4 |     Io(String),
[INFO] [stdout]   |     ^^
[INFO] [stdout] 5 |     #[error("failed to parse as string: {0}")]
[INFO] [stdout] 6 |     Utf8(String),
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` 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 12.25s
[INFO] running `Command { std: "docker" "inspect" "565380e5b1b43410cbdac00fdeb0e7dccbb3febea39dd50a76e677dd440ef2cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "565380e5b1b43410cbdac00fdeb0e7dccbb3febea39dd50a76e677dd440ef2cd", kill_on_drop: false }`
[INFO] [stdout] 565380e5b1b43410cbdac00fdeb0e7dccbb3febea39dd50a76e677dd440ef2cd