[INFO] cloning repository https://github.com/fdb/rustcarver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fdb/rustcarver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdb%2Frustcarver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdb%2Frustcarver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5848b7948f2063d028686ac9a8c3887c0768be08
[INFO] checking fdb/rustcarver against try#7f168b18704203996d3698515c88a036a9300946 for pr-102713
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdb%2Frustcarver" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fdb/rustcarver on toolchain 7f168b18704203996d3698515c88a036a9300946
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f168b18704203996d3698515c88a036a9300946" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fdb/rustcarver
[INFO] finished tweaking git repo https://github.com/fdb/rustcarver
[INFO] tweaked toml for git repo https://github.com/fdb/rustcarver written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/fdb/rustcarver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f168b18704203996d3698515c88a036a9300946" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+7f168b18704203996d3698515c88a036a9300946" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4c2411cbcd86b6a1999e74cc741c82e52cae189c2cc48ab4592412ed736e86a
[INFO] running `Command { std: "docker" "start" "-a" "e4c2411cbcd86b6a1999e74cc741c82e52cae189c2cc48ab4592412ed736e86a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4c2411cbcd86b6a1999e74cc741c82e52cae189c2cc48ab4592412ed736e86a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4c2411cbcd86b6a1999e74cc741c82e52cae189c2cc48ab4592412ed736e86a", kill_on_drop: false }`
[INFO] [stdout] e4c2411cbcd86b6a1999e74cc741c82e52cae189c2cc48ab4592412ed736e86a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+7f168b18704203996d3698515c88a036a9300946" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4f7527c674c0b3bf40a925f29f1519b2abe98908784e32e61d6a6a7ed0d37b6
[INFO] running `Command { std: "docker" "start" "-a" "f4f7527c674c0b3bf40a925f29f1519b2abe98908784e32e61d6a6a7ed0d37b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]     Checking same-file v1.0.4
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]     Checking dirs v1.0.4
[INFO] [stderr]     Checking rustcarver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `home_dir`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let home_dir = dirs::home_dir().unwrap();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_home_dir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home_dir`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let home_dir = dirs::home_dir().unwrap();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_home_dir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f4f7527c674c0b3bf40a925f29f1519b2abe98908784e32e61d6a6a7ed0d37b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4f7527c674c0b3bf40a925f29f1519b2abe98908784e32e61d6a6a7ed0d37b6", kill_on_drop: false }`
[INFO] [stdout] f4f7527c674c0b3bf40a925f29f1519b2abe98908784e32e61d6a6a7ed0d37b6