[INFO] cloning repository https://github.com/steven887/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steven887/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteven887%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteven887%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d741eaf59ccd7c0a542aa632f7856c2fe5a73888
[INFO] checking steven887/learn_rust against master#08cd08fbef8c6663b052d8d9e4930d5696cbb8a7 for 150662-leaf-spurious
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteven887%2Flearn_rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/steven887/learn_rust
[INFO] finished tweaking git repo https://github.com/steven887/learn_rust
[INFO] tweaked toml for git repo https://github.com/steven887/learn_rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/steven887/learn_rust on toolchain 08cd08fbef8c6663b052d8d9e4930d5696cbb8a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+08cd08fbef8c6663b052d8d9e4930d5696cbb8a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/steven887/learn_rust 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" "+08cd08fbef8c6663b052d8d9e4930d5696cbb8a7" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+08cd08fbef8c6663b052d8d9e4930d5696cbb8a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 31f983268a029a89d4efb1b295b4e7cc58a3bf5e6e05eb192e13111c515d276e
[INFO] running `Command { std: "docker" "start" "-a" "31f983268a029a89d4efb1b295b4e7cc58a3bf5e6e05eb192e13111c515d276e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31f983268a029a89d4efb1b295b4e7cc58a3bf5e6e05eb192e13111c515d276e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31f983268a029a89d4efb1b295b4e7cc58a3bf5e6e05eb192e13111c515d276e", kill_on_drop: false }`
[INFO] [stdout] 31f983268a029a89d4efb1b295b4e7cc58a3bf5e6e05eb192e13111c515d276e
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+08cd08fbef8c6663b052d8d9e4930d5696cbb8a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9dfb5c8da2417bbfc896d50f4f761067a181ffef6fe4705e9ea8645f26900bb4
[INFO] running `Command { std: "docker" "start" "-a" "9dfb5c8da2417bbfc896d50f4f761067a181ffef6fe4705e9ea8645f26900bb4", kill_on_drop: false }`
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `last_name`, `age`, and `middle_name` are never read
[INFO] [stdout]   --> src/traits.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Person {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 15 |    pub first_name: String,
[INFO] [stdout] 16 |    pub last_name: String,
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 17 |    pub age: u8,
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 18 |    pub middle_name: String,
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `last_name`, `age`, and `middle_name` are never read
[INFO] [stdout]   --> src/traits.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Person {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 15 |    pub first_name: String,
[INFO] [stdout] 16 |    pub last_name: String,
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 17 |    pub age: u8,
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 18 |    pub middle_name: String,
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "9dfb5c8da2417bbfc896d50f4f761067a181ffef6fe4705e9ea8645f26900bb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dfb5c8da2417bbfc896d50f4f761067a181ffef6fe4705e9ea8645f26900bb4", kill_on_drop: false }`
[INFO] [stdout] 9dfb5c8da2417bbfc896d50f4f761067a181ffef6fe4705e9ea8645f26900bb4