[INFO] cloning repository https://github.com/dominikbraun/threadpool
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dominikbraun/threadpool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdominikbraun%2Fthreadpool"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdominikbraun%2Fthreadpool'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] becd6789ab227729f28a4deaf052ecf037dd5693
[INFO] checking dominikbraun/threadpool against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdominikbraun%2Fthreadpool" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dominikbraun/threadpool on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/dominikbraun/threadpool
[INFO] finished tweaking git repo https://github.com/dominikbraun/threadpool
[INFO] tweaked toml for git repo https://github.com/dominikbraun/threadpool written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/dominikbraun/threadpool already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 549c885e828731fc2053869d3bd8d615a4f8ce8894f333c656c66f76f34011ab
[INFO] running `"docker" "start" "-a" "549c885e828731fc2053869d3bd8d615a4f8ce8894f333c656c66f76f34011ab"`
[INFO] [stderr]     Checking threadpool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `subjects`
[INFO] [stderr]   --> src/lib.rs:12:32
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn run<T: Resource>(&self, subjects: &[T], f: fn(T) -> T) {}
[INFO] [stderr]    |                                ^^^^^^^^ help: consider prefixing with an underscore: `_subjects`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/lib.rs:12:48
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn run<T: Resource>(&self, subjects: &[T], f: fn(T) -> T) {}
[INFO] [stderr]    |                                                ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `custom`
[INFO] [stderr]   --> src/lib.rs:23:23
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn process(&self, custom: fn(T) -> T) {}
[INFO] [stderr]    |                       ^^^^^^ help: consider prefixing with an underscore: `_custom`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pool`
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Pool {
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn run<T: Resource>(&self, subjects: &[T], f: fn(T) -> T) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_jobs`
[INFO] [stderr]   --> src/lib.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn push_jobs(&self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]   --> src/lib.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn spawn(&self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `join`
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn join(&self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Worker`
[INFO] [stderr]   --> src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Worker<T: Resource> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `process`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn process(&self, custom: fn(T) -> T) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subjects`
[INFO] [stderr]   --> src/lib.rs:12:32
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn run<T: Resource>(&self, subjects: &[T], f: fn(T) -> T) {}
[INFO] [stderr]    |                                ^^^^^^^^ help: consider prefixing with an underscore: `_subjects`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/lib.rs:12:48
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn run<T: Resource>(&self, subjects: &[T], f: fn(T) -> T) {}
[INFO] [stderr]    |                                                ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `custom`
[INFO] [stderr]   --> src/lib.rs:23:23
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn process(&self, custom: fn(T) -> T) {}
[INFO] [stderr]    |                       ^^^^^^ help: consider prefixing with an underscore: `_custom`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pool`
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Pool {
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn run<T: Resource>(&self, subjects: &[T], f: fn(T) -> T) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_jobs`
[INFO] [stderr]   --> src/lib.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn push_jobs(&self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]   --> src/lib.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn spawn(&self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `join`
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn join(&self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Worker`
[INFO] [stderr]   --> src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Worker<T: Resource> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `process`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn process(&self, custom: fn(T) -> T) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `"docker" "inspect" "549c885e828731fc2053869d3bd8d615a4f8ce8894f333c656c66f76f34011ab"`
[INFO] running `"docker" "rm" "-f" "549c885e828731fc2053869d3bd8d615a4f8ce8894f333c656c66f76f34011ab"`
[INFO] [stdout] 549c885e828731fc2053869d3bd8d615a4f8ce8894f333c656c66f76f34011ab