Dec 19 16:30:21.605 INFO checking glasses-n-contacts/rust-simple-server against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:30:21.605 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/glasses-n-contacts/rust-simple-server:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:30:22.122 INFO [stdout] 4c23101ddc3f2cdfea5868cff500e446d5ed507ce3424e07d309206968cb7aa9
Dec 19 16:30:22.128 INFO running `"docker" "start" "-a" "4c23101ddc3f2cdfea5868cff500e446d5ed507ce3424e07d309206968cb7aa9"`
Dec 19 16:30:24.080 INFO [stderr]     Checking hello v0.1.0 (/opt/crater/workdir)
Dec 19 16:30:24.372 INFO [stderr] warning: field is never used: `workers`
Dec 19 16:30:24.372 INFO [stderr]  --> src/lib.rs:7:5
Dec 19 16:30:24.372 INFO [stderr]   |
Dec 19 16:30:24.372 INFO [stderr] 7 |     workers: Vec<Worker>,
Dec 19 16:30:24.372 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 19 16:30:24.372 INFO [stderr]   |
Dec 19 16:30:24.372 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 16:30:24.372 INFO [stderr] 
Dec 19 16:30:24.372 INFO [stderr] warning: field is never used: `id`
Dec 19 16:30:24.372 INFO [stderr]   --> src/lib.rs:61:5
Dec 19 16:30:24.372 INFO [stderr]    |
Dec 19 16:30:24.372 INFO [stderr] 61 |     id: usize,
Dec 19 16:30:24.372 INFO [stderr]    |     ^^^^^^^^^
Dec 19 16:30:24.372 INFO [stderr] 
Dec 19 16:30:24.372 INFO [stderr] warning: field is never used: `thread`
Dec 19 16:30:24.372 INFO [stderr]   --> src/lib.rs:62:5
Dec 19 16:30:24.372 INFO [stderr]    |
Dec 19 16:30:24.372 INFO [stderr] 62 |     thread: thread::JoinHandle<()>,
Dec 19 16:30:24.373 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:30:24.373 INFO [stderr] 
Dec 19 16:30:24.804 INFO [stderr] warning: field is never used: `workers`
Dec 19 16:30:24.804 INFO [stderr]  --> src/lib.rs:7:5
Dec 19 16:30:24.804 INFO [stderr]   |
Dec 19 16:30:24.804 INFO [stderr] 7 |     workers: Vec<Worker>,
Dec 19 16:30:24.804 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 19 16:30:24.804 INFO [stderr]   |
Dec 19 16:30:24.804 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 16:30:24.804 INFO [stderr] 
Dec 19 16:30:24.804 INFO [stderr] warning: field is never used: `id`
Dec 19 16:30:24.804 INFO [stderr]   --> src/lib.rs:61:5
Dec 19 16:30:24.804 INFO [stderr]    |
Dec 19 16:30:24.804 INFO [stderr] 61 |     id: usize,
Dec 19 16:30:24.804 INFO [stderr]    |     ^^^^^^^^^
Dec 19 16:30:24.804 INFO [stderr] 
Dec 19 16:30:24.804 INFO [stderr] warning: field is never used: `thread`
Dec 19 16:30:24.804 INFO [stderr]   --> src/lib.rs:62:5
Dec 19 16:30:24.804 INFO [stderr]    |
Dec 19 16:30:24.804 INFO [stderr] 62 |     thread: thread::JoinHandle<()>,
Dec 19 16:30:24.804 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:30:24.804 INFO [stderr] 
Dec 19 16:30:25.196 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
Dec 19 16:30:26.062 INFO running `"docker" "inspect" "4c23101ddc3f2cdfea5868cff500e446d5ed507ce3424e07d309206968cb7aa9"`
Dec 19 16:30:26.374 INFO running `"docker" "rm" "-f" "4c23101ddc3f2cdfea5868cff500e446d5ed507ce3424e07d309206968cb7aa9"`
Dec 19 16:30:26.708 INFO [stdout] 4c23101ddc3f2cdfea5868cff500e446d5ed507ce3424e07d309206968cb7aa9