Dec 18 13:45:08.774 INFO checking nbchan-0.1.3 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:45:08.774 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/nbchan/0.1.3:/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 13:45:08.971 INFO [stdout] 24a839700dcb17636b8d80de9e3f253da84aba57f56aa83cfaf8920e043de18d
Dec 18 13:45:08.973 INFO running `"docker" "start" "-a" "24a839700dcb17636b8d80de9e3f253da84aba57f56aa83cfaf8920e043de18d"`
Dec 18 13:45:09.572 INFO [stderr]     Checking nbchan v0.1.3 (/opt/crater/workdir)
Dec 18 13:45:10.632 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 18 13:45:10.632 INFO [stderr]   --> benches/lib.rs:38:9
Dec 18 13:45:10.632 INFO [stderr]    |
Dec 18 13:45:10.632 INFO [stderr] 38 |         tx.clone();
Dec 18 13:45:10.632 INFO [stderr]    |         ^^^^^^^^^^^
Dec 18 13:45:10.632 INFO [stderr]    |
Dec 18 13:45:10.632 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 13:45:10.632 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 18 13:45:10.632 INFO [stderr] 
Dec 18 13:45:10.632 INFO [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
Dec 18 13:45:10.632 INFO [stderr]   --> benches/lib.rs:46:9
Dec 18 13:45:10.632 INFO [stderr]    |
Dec 18 13:45:10.632 INFO [stderr] 46 |         tx.clone();
Dec 18 13:45:10.633 INFO [stderr]    |         ^^^^^^^^^^^
Dec 18 13:45:10.633 INFO [stderr]    |
Dec 18 13:45:10.633 INFO [stderr]    = note: cloning is often expensive and is not expected to have side effects
Dec 18 13:45:10.633 INFO [stderr] 
Dec 18 13:45:10.655 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
Dec 18 13:45:10.916 INFO running `"docker" "inspect" "24a839700dcb17636b8d80de9e3f253da84aba57f56aa83cfaf8920e043de18d"`
Dec 18 13:45:11.014 INFO running `"docker" "rm" "-f" "24a839700dcb17636b8d80de9e3f253da84aba57f56aa83cfaf8920e043de18d"`
Dec 18 13:45:11.180 INFO [stdout] 24a839700dcb17636b8d80de9e3f253da84aba57f56aa83cfaf8920e043de18d