[INFO] cloning repository https://github.com/unional/rusty-guidebook
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/unional/rusty-guidebook" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funional%2Frusty-guidebook", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funional%2Frusty-guidebook'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b5df318b063b69bba8bffae2ce4931382e18114c
[INFO] checking unional/rusty-guidebook against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funional%2Frusty-guidebook" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/unional/rusty-guidebook
[INFO] finished tweaking git repo https://github.com/unional/rusty-guidebook
[INFO] tweaked toml for git repo https://github.com/unional/rusty-guidebook written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/unional/rusty-guidebook on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/unional/rusty-guidebook 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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b2bde8a0eb707409ac561feb641e0170dfcbf870f5ce625e6ce8654d339e9a8
[INFO] running `Command { std: "docker" "start" "-a" "3b2bde8a0eb707409ac561feb641e0170dfcbf870f5ce625e6ce8654d339e9a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b2bde8a0eb707409ac561feb641e0170dfcbf870f5ce625e6ce8654d339e9a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b2bde8a0eb707409ac561feb641e0170dfcbf870f5ce625e6ce8654d339e9a8", kill_on_drop: false }`
[INFO] [stdout] 3b2bde8a0eb707409ac561feb641e0170dfcbf870f5ce625e6ce8654d339e9a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6629bd63a8343ddcf0b9d51529f27c19dc45c8009b5cfe2c234ba4e517eed70c
[INFO] running `Command { std: "docker" "start" "-a" "6629bd63a8343ddcf0b9d51529f27c19dc45c8009b5cfe2c234ba4e517eed70c", kill_on_drop: false }`
[INFO] [stderr]     Checking rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `example`
[INFO] [stdout]  --> src/enums.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[cfg(example)]
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(example)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(example)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `example`
[INFO] [stdout]  --> src/enums.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[cfg(example)]
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(example)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(example)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Barker` is never used
[INFO] [stdout]  --> src/_examples/overlap_traits.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Barker {
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Barker2` is never used
[INFO] [stdout]  --> src/_examples/overlap_traits.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait Barker2 {
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Human` is never constructed
[INFO] [stdout]  --> src/_examples/overlap_traits.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Human {}
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `s` is never read
[INFO] [stdout]  --> src/lifetimes.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct A {
[INFO] [stdout]   |            - field in this struct
[INFO] [stdout] 3 |   s: String,
[INFO] [stdout]   |   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `A` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Barker2` is never used
[INFO] [stdout]  --> src/_examples/overlap_traits.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait Barker2 {
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `s` is never read
[INFO] [stdout]  --> src/lifetimes.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct A {
[INFO] [stdout]   |            - field in this struct
[INFO] [stdout] 3 |   s: String,
[INFO] [stdout]   |   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `A` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "6629bd63a8343ddcf0b9d51529f27c19dc45c8009b5cfe2c234ba4e517eed70c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6629bd63a8343ddcf0b9d51529f27c19dc45c8009b5cfe2c234ba4e517eed70c", kill_on_drop: false }`
[INFO] [stdout] 6629bd63a8343ddcf0b9d51529f27c19dc45c8009b5cfe2c234ba4e517eed70c