Dec 17 20:00:57.485 INFO checking matklad/select-2018 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 20:00:57.485 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/matklad/select-2018:/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 17 20:00:58.008 INFO [stdout] c7697945cd2b6fcff41fba9fa21b36f9d14a66910e2ab1d6230b3afb9f0f9f61
Dec 17 20:00:58.010 INFO running `"docker" "start" "-a" "c7697945cd2b6fcff41fba9fa21b36f9d14a66910e2ab1d6230b3afb9f0f9f61"`
Dec 17 20:00:59.990 INFO [stderr]     Checking crossbeam-epoch v0.5.0
Dec 17 20:01:00.651 INFO [stderr]     Checking crossbeam-channel v0.2.2
Dec 17 20:01:01.762 INFO [stderr]     Checking macro_select v0.1.0 (/opt/crater/workdir)
Dec 17 20:01:02.310 INFO [stderr] warning: struct is never constructed: `ConcurrentJob`
Dec 17 20:01:02.310 INFO [stderr]  --> src/concurrency.rs:4:1
Dec 17 20:01:02.311 INFO [stderr]   |
Dec 17 20:01:02.311 INFO [stderr] 4 | pub struct ConcurrentJob {
Dec 17 20:01:02.311 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:01:02.311 INFO [stderr]   |
Dec 17 20:01:02.312 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 20:01:02.312 INFO [stderr] 
Dec 17 20:01:02.312 INFO [stderr] warning: function is never used: `wait_for_all`
Dec 17 20:01:02.313 INFO [stderr]  --> src/concurrency.rs:8:1
Dec 17 20:01:02.313 INFO [stderr]   |
Dec 17 20:01:02.313 INFO [stderr] 8 | pub fn wait_for_all(mut jobs: Vec<ConcurrentJob>,) {
Dec 17 20:01:02.313 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:01:02.313 INFO [stderr] 
Dec 17 20:01:02.339 INFO [stderr] warning: struct is never constructed: `ConcurrentJob`
Dec 17 20:01:02.339 INFO [stderr]  --> src/concurrency.rs:4:1
Dec 17 20:01:02.339 INFO [stderr]   |
Dec 17 20:01:02.339 INFO [stderr] 4 | pub struct ConcurrentJob {
Dec 17 20:01:02.340 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:01:02.340 INFO [stderr]   |
Dec 17 20:01:02.340 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 20:01:02.341 INFO [stderr] 
Dec 17 20:01:02.341 INFO [stderr] warning: function is never used: `wait_for_all`
Dec 17 20:01:02.341 INFO [stderr]  --> src/concurrency.rs:8:1
Dec 17 20:01:02.342 INFO [stderr]   |
Dec 17 20:01:02.342 INFO [stderr] 8 | pub fn wait_for_all(mut jobs: Vec<ConcurrentJob>,) {
Dec 17 20:01:02.342 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 20:01:02.342 INFO [stderr] 
Dec 17 20:01:02.402 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
Dec 17 20:01:03.034 INFO running `"docker" "inspect" "c7697945cd2b6fcff41fba9fa21b36f9d14a66910e2ab1d6230b3afb9f0f9f61"`
Dec 17 20:01:03.162 INFO running `"docker" "rm" "-f" "c7697945cd2b6fcff41fba9fa21b36f9d14a66910e2ab1d6230b3afb9f0f9f61"`
Dec 17 20:01:03.392 INFO [stdout] c7697945cd2b6fcff41fba9fa21b36f9d14a66910e2ab1d6230b3afb9f0f9f61