[INFO] updating cached repository https://github.com/jetilling/rust_example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 106a724b5d32b447596d357d17c3d46fe3a872a7
[INFO] checking jetilling/rust_example against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjetilling%2Frust_example" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jetilling/rust_example 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/jetilling/rust_example
[INFO] finished tweaking git repo https://github.com/jetilling/rust_example
[INFO] tweaked toml for git repo https://github.com/jetilling/rust_example written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jetilling/rust_example 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-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" "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] 3cbe0829d683f195f2a1f46f60d6871997f77236bd51c2bce59e7c2076295941
[INFO] running `"docker" "start" "-a" "3cbe0829d683f195f2a1f46f60d6871997f77236bd51c2bce59e7c2076295941"`
[INFO] [stderr]     Checking rust_example_app v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/lib.rs:29:28
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub fn execute<F>(&self, f: F)
[INFO] [stderr]    |                            ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]  --> src/lib.rs:4:3
[INFO] [stderr]   |
[INFO] [stderr] 4 |   workers: Vec<Worker>
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `id`
[INFO] [stderr]   --> src/lib.rs:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |   id: usize,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:39:3
[INFO] [stderr]    |
[INFO] [stderr] 39 |   thread: thread::JoinHandle<()>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/lib.rs:29:28
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub fn execute<F>(&self, f: F)
[INFO] [stderr]    |                            ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `workers`
[INFO] [stderr]  --> src/lib.rs:4:3
[INFO] [stderr]   |
[INFO] [stderr] 4 |   workers: Vec<Worker>
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `id`
[INFO] [stderr]   --> src/lib.rs:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |   id: usize,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `thread`
[INFO] [stderr]   --> src/lib.rs:39:3
[INFO] [stderr]    |
[INFO] [stderr] 39 |   thread: thread::JoinHandle<()>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "3cbe0829d683f195f2a1f46f60d6871997f77236bd51c2bce59e7c2076295941"`
[INFO] running `"docker" "rm" "-f" "3cbe0829d683f195f2a1f46f60d6871997f77236bd51c2bce59e7c2076295941"`
[INFO] [stdout] 3cbe0829d683f195f2a1f46f60d6871997f77236bd51c2bce59e7c2076295941