[INFO] cloning repository https://github.com/justinfoote/skull
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/justinfoote/skull" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinfoote%2Fskull", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinfoote%2Fskull'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 07efba8f95352e4731c3d8233f828cdfa3b90425
[INFO] checking justinfoote/skull against master#336209eef13882bd1e211b24779584cb7ef911eb for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjustinfoote%2Fskull" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/justinfoote/skull 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/justinfoote/skull
[INFO] finished tweaking git repo https://github.com/justinfoote/skull
[INFO] tweaked toml for git repo https://github.com/justinfoote/skull written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/justinfoote/skull 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 0993dc716f900cb902d2e6fa1e14436d3f933c97f4880594282d6decdb98702f
[INFO] running `Command { std: "docker" "start" "-a" "0993dc716f900cb902d2e6fa1e14436d3f933c97f4880594282d6decdb98702f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0993dc716f900cb902d2e6fa1e14436d3f933c97f4880594282d6decdb98702f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0993dc716f900cb902d2e6fa1e14436d3f933c97f4880594282d6decdb98702f", kill_on_drop: false }`
[INFO] [stdout] 0993dc716f900cb902d2e6fa1e14436d3f933c97f4880594282d6decdb98702f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f6c2d8cfeffca92deccf27bbdf40f319c0c354bc69f32047660d34c824beb774
[INFO] running `Command { std: "docker" "start" "-a" "f6c2d8cfeffca92deccf27bbdf40f319c0c354bc69f32047660d34c824beb774", kill_on_drop: false }`
[INFO] [stderr]     Checking skull v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `id`, `hand`, and `score` are never read
[INFO] [stdout]   --> src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | struct Player {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 9  |     id: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 10 |     hand: [Card; 4],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     score: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Player` 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 `id`, `hand`, and `score` are never read
[INFO] [stdout]   --> src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | struct Player {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 9  |     id: String,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 10 |     hand: [Card; 4],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     score: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Player` 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 0.16s
[INFO] running `Command { std: "docker" "inspect" "f6c2d8cfeffca92deccf27bbdf40f319c0c354bc69f32047660d34c824beb774", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6c2d8cfeffca92deccf27bbdf40f319c0c354bc69f32047660d34c824beb774", kill_on_drop: false }`
[INFO] [stdout] f6c2d8cfeffca92deccf27bbdf40f319c0c354bc69f32047660d34c824beb774