[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#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funional%2Frusty-guidebook" "/workspace/builds/worker-84/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-84/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  97% (33/34)
Updating files: 100% (34/34)
Updating files: 100% (34/34), done.
[INFO] validating manifest of git repo https://github.com/unional/rusty-guidebook on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-84/source/Cargo.toml
[INFO] crate git repo https://github.com/unional/rusty-guidebook already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9df472fc77338b63112456bac34147b2e32d9b96dde9634bba3a9c9a24a8e4b1
[INFO] running `Command { std: "docker" "start" "-a" "9df472fc77338b63112456bac34147b2e32d9b96dde9634bba3a9c9a24a8e4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9df472fc77338b63112456bac34147b2e32d9b96dde9634bba3a9c9a24a8e4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9df472fc77338b63112456bac34147b2e32d9b96dde9634bba3a9c9a24a8e4b1", kill_on_drop: false }`
[INFO] [stdout] 9df472fc77338b63112456bac34147b2e32d9b96dde9634bba3a9c9a24a8e4b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6eb1c76efd325bd44b424070cdb91d1df631aab5f2a761cddfa48272faf822e
[INFO] running `Command { std: "docker" "start" "-a" "d6eb1c76efd325bd44b424070cdb91d1df631aab5f2a761cddfa48272faf822e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `s`
[INFO] [stdout]  --> src/lifetimes.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   s: String,
[INFO] [stdout]   |   ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `s`
[INFO] [stdout]  --> src/lifetimes.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   s: String,
[INFO] [stdout]   |   ^^^^^^^^^
[INFO] [stdout]   |
[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 [unoptimized + debuginfo] target(s) in 17.56s
[INFO] running `Command { std: "docker" "inspect" "d6eb1c76efd325bd44b424070cdb91d1df631aab5f2a761cddfa48272faf822e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6eb1c76efd325bd44b424070cdb91d1df631aab5f2a761cddfa48272faf822e", kill_on_drop: false }`
[INFO] [stdout] d6eb1c76efd325bd44b424070cdb91d1df631aab5f2a761cddfa48272faf822e