[INFO] fetching crate serde-types 0.1.1...
[INFO] checking serde-types-0.1.1 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate serde-types 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate serde-types 0.1.1 on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-types 0.1.1
[INFO] finished tweaking crates.io crate serde-types 0.1.1
[INFO] tweaked toml for crates.io crate serde-types 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.13.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1749049b56453c4f2ebc6a85490eaffc5cfd5a57b33cf8969d8e9c5ab987a2df
[INFO] running `Command { std: "docker" "start" "-a" "1749049b56453c4f2ebc6a85490eaffc5cfd5a57b33cf8969d8e9c5ab987a2df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1749049b56453c4f2ebc6a85490eaffc5cfd5a57b33cf8969d8e9c5ab987a2df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1749049b56453c4f2ebc6a85490eaffc5cfd5a57b33cf8969d8e9c5ab987a2df", kill_on_drop: false }`
[INFO] [stdout] 1749049b56453c4f2ebc6a85490eaffc5cfd5a57b33cf8969d8e9c5ab987a2df
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 570640be830298270175c6411ec451cbf3458e7b752436c84f32a326096a140b
[INFO] running `Command { std: "docker" "start" "-a" "570640be830298270175c6411ec451cbf3458e7b752436c84f32a326096a140b", kill_on_drop: false }`
[INFO] [stderr]     Checking serde-types v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `id`, `user`, and `book` are never read
[INFO] [stdout]   --> tests/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Test {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 37 |     id: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 38 |     user: u8,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 39 |     book: u8,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Test` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "570640be830298270175c6411ec451cbf3458e7b752436c84f32a326096a140b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "570640be830298270175c6411ec451cbf3458e7b752436c84f32a326096a140b", kill_on_drop: false }`
[INFO] [stdout] 570640be830298270175c6411ec451cbf3458e7b752436c84f32a326096a140b