Dec 19 16:01:19.363 INFO checking howeih/Day-41-Union-Find against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:01:19.364 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/howeih/Day-41-Union-Find:/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 16:01:19.764 INFO [stdout] 2bd76a4fc0ca8aabea7027625c0acbb81a3638fa34844ec205d88117f05ccb36
Dec 19 16:01:19.768 INFO running `"docker" "start" "-a" "2bd76a4fc0ca8aabea7027625c0acbb81a3638fa34844ec205d88117f05ccb36"`
Dec 19 16:01:21.036 INFO [stderr]     Checking union_find v0.1.0 (/opt/crater/workdir)
Dec 19 16:01:21.232 INFO [stderr] warning: unused import: `std::iter::Iterator`
Dec 19 16:01:21.232 INFO [stderr]  --> src/main.rs:2:5
Dec 19 16:01:21.232 INFO [stderr]   |
Dec 19 16:01:21.232 INFO [stderr] 2 | use std::iter::Iterator;
Dec 19 16:01:21.232 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 16:01:21.232 INFO [stderr]   |
Dec 19 16:01:21.232 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:01:21.232 INFO [stderr] 
Dec 19 16:01:21.292 INFO [stderr] warning: unused import: `std::iter::Iterator`
Dec 19 16:01:21.292 INFO [stderr]  --> src/main.rs:2:5
Dec 19 16:01:21.292 INFO [stderr]   |
Dec 19 16:01:21.292 INFO [stderr] 2 | use std::iter::Iterator;
Dec 19 16:01:21.292 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 16:01:21.294 INFO [stderr]   |
Dec 19 16:01:21.294 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 16:01:21.294 INFO [stderr] 
Dec 19 16:01:21.368 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
Dec 19 16:01:21.706 INFO running `"docker" "inspect" "2bd76a4fc0ca8aabea7027625c0acbb81a3638fa34844ec205d88117f05ccb36"`
Dec 19 16:01:21.818 INFO running `"docker" "rm" "-f" "2bd76a4fc0ca8aabea7027625c0acbb81a3638fa34844ec205d88117f05ccb36"`
Dec 19 16:01:21.960 INFO [stdout] 2bd76a4fc0ca8aabea7027625c0acbb81a3638fa34844ec205d88117f05ccb36