[INFO] cloning repository https://github.com/danielhenrymantilla/ghosts.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danielhenrymantilla/ghosts.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielhenrymantilla%2Fghosts.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielhenrymantilla%2Fghosts.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6de7e1a6dbbf989291b4f3a11142b7a637cd7a51
[INFO] checking danielhenrymantilla/ghosts.rs against master#fd0c901b00ee1e08a250039cdb90258603497e20 for pr-153692
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielhenrymantilla%2Fghosts.rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/danielhenrymantilla/ghosts.rs
[INFO] finished tweaking git repo https://github.com/danielhenrymantilla/ghosts.rs
[INFO] tweaked toml for git repo https://github.com/danielhenrymantilla/ghosts.rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/danielhenrymantilla/ghosts.rs on toolchain fd0c901b00ee1e08a250039cdb90258603497e20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fd0c901b00ee1e08a250039cdb90258603497e20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/danielhenrymantilla/ghosts.rs 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" "+fd0c901b00ee1e08a250039cdb90258603497e20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded never-say-never v6.6.666
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+fd0c901b00ee1e08a250039cdb90258603497e20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34174bfc9062f96e72060814bbcca8e5814ca4c029553a0c329480a64f4b71b3
[INFO] running `Command { std: "docker" "start" "-a" "34174bfc9062f96e72060814bbcca8e5814ca4c029553a0c329480a64f4b71b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34174bfc9062f96e72060814bbcca8e5814ca4c029553a0c329480a64f4b71b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34174bfc9062f96e72060814bbcca8e5814ca4c029553a0c329480a64f4b71b3", kill_on_drop: false }`
[INFO] [stdout] 34174bfc9062f96e72060814bbcca8e5814ca4c029553a0c329480a64f4b71b3
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+fd0c901b00ee1e08a250039cdb90258603497e20" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e7c9d151b3fe9eff30373c6782f1798093028349c8b70611b6463bdacf13219
[INFO] running `Command { std: "docker" "start" "-a" "9e7c9d151b3fe9eff30373c6782f1798093028349c8b70611b6463bdacf13219", kill_on_drop: false }`
[INFO] [stderr]    Compiling ghosts-proc_macros v0.1.0 (/opt/rustwide/workdir/src/proc_macros)
[INFO] [stderr]     Checking never-say-never v6.6.666
[INFO] [stderr]     Checking ghosts v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/expr.rs:39:38
[INFO] [stdout]    |
[INFO] [stdout] 39 |     struct OutsideOfAGhostBlockError(u8);
[INFO] [stdout]    |            ------------------------- ^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/expr.rs:39:38
[INFO] [stdout]    |
[INFO] [stdout] 39 |     struct OutsideOfAGhostBlockError(u8);
[INFO] [stdout]    |            ------------------------- ^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[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 0.55s
[INFO] running `Command { std: "docker" "inspect" "9e7c9d151b3fe9eff30373c6782f1798093028349c8b70611b6463bdacf13219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e7c9d151b3fe9eff30373c6782f1798093028349c8b70611b6463bdacf13219", kill_on_drop: false }`
[INFO] [stdout] 9e7c9d151b3fe9eff30373c6782f1798093028349c8b70611b6463bdacf13219