Dec 17 23:13:06.385 INFO checking howeih/Day-41-Union-Find against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 23:13:06.385 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:13:06.754 INFO [stdout] 0df65922861db61f854cc74fa034c683577f2ef349fd9bc3db7cd016f067e96b
Dec 17 23:13:06.760 INFO running `"docker" "start" "-a" "0df65922861db61f854cc74fa034c683577f2ef349fd9bc3db7cd016f067e96b"`
Dec 17 23:13:08.004 INFO [stderr]     Checking union_find v0.1.0 (/opt/crater/workdir)
Dec 17 23:13:08.196 INFO [stderr] warning: unused import: `std::iter::Iterator`
Dec 17 23:13:08.196 INFO [stderr]  --> src/main.rs:2:5
Dec 17 23:13:08.196 INFO [stderr]   |
Dec 17 23:13:08.196 INFO [stderr] 2 | use std::iter::Iterator;
Dec 17 23:13:08.196 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 17 23:13:08.196 INFO [stderr]   |
Dec 17 23:13:08.196 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 23:13:08.196 INFO [stderr] 
Dec 17 23:13:08.220 INFO [stderr] warning: unused import: `std::iter::Iterator`
Dec 17 23:13:08.220 INFO [stderr]  --> src/main.rs:2:5
Dec 17 23:13:08.220 INFO [stderr]   |
Dec 17 23:13:08.220 INFO [stderr] 2 | use std::iter::Iterator;
Dec 17 23:13:08.220 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 17 23:13:08.220 INFO [stderr]   |
Dec 17 23:13:08.220 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 23:13:08.220 INFO [stderr] 
Dec 17 23:13:08.275 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
Dec 17 23:13:08.719 INFO running `"docker" "inspect" "0df65922861db61f854cc74fa034c683577f2ef349fd9bc3db7cd016f067e96b"`
Dec 17 23:13:08.824 INFO running `"docker" "rm" "-f" "0df65922861db61f854cc74fa034c683577f2ef349fd9bc3db7cd016f067e96b"`
Dec 17 23:13:08.904 INFO [stdout] 0df65922861db61f854cc74fa034c683577f2ef349fd9bc3db7cd016f067e96b