Dec 18 06:36:47.862 INFO checking MainShayne233/concurrency_demo against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 06:36:47.862 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/MainShayne233/concurrency_demo:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 06:36:48.410 INFO [stdout] 83d1bce0711f9ced4f858bd8436ea5a29624f2a18e96678fd407e151c128b667
Dec 18 06:36:48.412 INFO running `"docker" "start" "-a" "83d1bce0711f9ced4f858bd8436ea5a29624f2a18e96678fd407e151c128b667"`
Dec 18 06:36:50.874 INFO [stderr]     Checking concurrency_demo v0.1.0 (/opt/crater/workdir)
Dec 18 06:36:51.196 INFO [stderr] warning: field is never used: `workers`
Dec 18 06:36:51.197 INFO [stderr]  --> src/lib.rs:7:5
Dec 18 06:36:51.197 INFO [stderr]   |
Dec 18 06:36:51.197 INFO [stderr] 7 |     workers: Vec<Worker>,
Dec 18 06:36:51.198 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 18 06:36:51.198 INFO [stderr]   |
Dec 18 06:36:51.198 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 06:36:51.198 INFO [stderr] 
Dec 18 06:36:51.198 INFO [stderr] warning: field is never used: `id`
Dec 18 06:36:51.199 INFO [stderr]   --> src/lib.rs:49:5
Dec 18 06:36:51.199 INFO [stderr]    |
Dec 18 06:36:51.199 INFO [stderr] 49 |     id: usize,
Dec 18 06:36:51.199 INFO [stderr]    |     ^^^^^^^^^
Dec 18 06:36:51.199 INFO [stderr] 
Dec 18 06:36:51.200 INFO [stderr] warning: field is never used: `thread`
Dec 18 06:36:51.200 INFO [stderr]   --> src/lib.rs:50:5
Dec 18 06:36:51.200 INFO [stderr]    |
Dec 18 06:36:51.201 INFO [stderr] 50 |     thread: thread::JoinHandle<()>,
Dec 18 06:36:51.201 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:36:51.201 INFO [stderr] 
Dec 18 06:36:51.572 INFO [stderr] warning: field is never used: `workers`
Dec 18 06:36:51.573 INFO [stderr]  --> src/lib.rs:7:5
Dec 18 06:36:51.573 INFO [stderr]   |
Dec 18 06:36:51.573 INFO [stderr] 7 |     workers: Vec<Worker>,
Dec 18 06:36:51.574 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 18 06:36:51.574 INFO [stderr]   |
Dec 18 06:36:51.575 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 06:36:51.575 INFO [stderr] 
Dec 18 06:36:51.575 INFO [stderr] warning: field is never used: `id`
Dec 18 06:36:51.576 INFO [stderr]   --> src/lib.rs:49:5
Dec 18 06:36:51.576 INFO [stderr]    |
Dec 18 06:36:51.576 INFO [stderr] 49 |     id: usize,
Dec 18 06:36:51.577 INFO [stderr]    |     ^^^^^^^^^
Dec 18 06:36:51.577 INFO [stderr] 
Dec 18 06:36:51.577 INFO [stderr] warning: field is never used: `thread`
Dec 18 06:36:51.578 INFO [stderr]   --> src/lib.rs:50:5
Dec 18 06:36:51.578 INFO [stderr]    |
Dec 18 06:36:51.578 INFO [stderr] 50 |     thread: thread::JoinHandle<()>,
Dec 18 06:36:51.578 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:36:51.578 INFO [stderr] 
Dec 18 06:36:51.973 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
Dec 18 06:36:52.898 INFO running `"docker" "inspect" "83d1bce0711f9ced4f858bd8436ea5a29624f2a18e96678fd407e151c128b667"`
Dec 18 06:36:53.156 INFO running `"docker" "rm" "-f" "83d1bce0711f9ced4f858bd8436ea5a29624f2a18e96678fd407e151c128b667"`
Dec 18 06:36:53.434 INFO [stdout] 83d1bce0711f9ced4f858bd8436ea5a29624f2a18e96678fd407e151c128b667