Dec 13 17:22:03.618 INFO testing howeih/Day-41-Union-Find against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 17:22:03.618 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 17:22:03.815 INFO [stdout] 739331844dd9ad2b765d439b50447e7ef26f598bb18220af9617282205cad287
Dec 13 17:22:03.818 INFO running `"docker" "start" "-a" "739331844dd9ad2b765d439b50447e7ef26f598bb18220af9617282205cad287"`
Dec 13 17:22:04.656 INFO [stderr] usermod: no changes
Dec 13 17:22:04.695 INFO [stderr]    Compiling union_find v0.1.0 (/source)
Dec 13 17:22:04.849 INFO [stderr] warning: unused import: `std::iter::Iterator`
Dec 13 17:22:04.849 INFO [stderr]  --> src/main.rs:2:5
Dec 13 17:22:04.849 INFO [stderr]   |
Dec 13 17:22:04.849 INFO [stderr] 2 | use std::iter::Iterator;
Dec 13 17:22:04.849 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 13 17:22:04.849 INFO [stderr]   |
Dec 13 17:22:04.849 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 13 17:22:04.849 INFO [stderr] 
Dec 13 17:22:05.173 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
Dec 13 17:22:05.173 INFO [stderr] su: No module specific data is present
Dec 13 17:22:05.516 INFO running `"docker" "inspect" "739331844dd9ad2b765d439b50447e7ef26f598bb18220af9617282205cad287"`
Dec 13 17:22:05.621 INFO running `"docker" "rm" "-f" "739331844dd9ad2b765d439b50447e7ef26f598bb18220af9617282205cad287"`
Dec 13 17:22:05.692 INFO [stdout] 739331844dd9ad2b765d439b50447e7ef26f598bb18220af9617282205cad287
Dec 13 17:22:05.696 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 17:22:05.860 INFO [stdout] c0e2e4972ea71d523cb677e13f094a2591b916cf501d505ab6bdbe5a9ad7af98
Dec 13 17:22:05.865 INFO running `"docker" "start" "-a" "c0e2e4972ea71d523cb677e13f094a2591b916cf501d505ab6bdbe5a9ad7af98"`
Dec 13 17:22:06.255 INFO [stderr] usermod: no changes
Dec 13 17:22:06.287 INFO [stderr]    Compiling union_find v0.1.0 (/source)
Dec 13 17:22:06.607 INFO [stderr] warning: unused import: `std::iter::Iterator`
Dec 13 17:22:06.607 INFO [stderr]  --> src/main.rs:2:5
Dec 13 17:22:06.607 INFO [stderr]   |
Dec 13 17:22:06.607 INFO [stderr] 2 | use std::iter::Iterator;
Dec 13 17:22:06.607 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 13 17:22:06.607 INFO [stderr]   |
Dec 13 17:22:06.607 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 13 17:22:06.607 INFO [stderr] 
Dec 13 17:22:06.987 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
Dec 13 17:22:06.987 INFO [stderr] su: No module specific data is present
Dec 13 17:22:07.389 INFO running `"docker" "inspect" "c0e2e4972ea71d523cb677e13f094a2591b916cf501d505ab6bdbe5a9ad7af98"`
Dec 13 17:22:07.469 INFO running `"docker" "rm" "-f" "c0e2e4972ea71d523cb677e13f094a2591b916cf501d505ab6bdbe5a9ad7af98"`
Dec 13 17:22:07.570 INFO [stdout] c0e2e4972ea71d523cb677e13f094a2591b916cf501d505ab6bdbe5a9ad7af98
Dec 13 17:22:07.571 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 17:22:07.720 INFO [stdout] 4238d7c50939b690dfccde22224d052ee7f2a53c8741da49d955407eb5b73cbc
Dec 13 17:22:07.722 INFO running `"docker" "start" "-a" "4238d7c50939b690dfccde22224d052ee7f2a53c8741da49d955407eb5b73cbc"`
Dec 13 17:22:08.158 INFO [stderr] usermod: no changes
Dec 13 17:22:08.183 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 13 17:22:08.186 INFO [stderr]      Running /target/debug/deps/union_find-b8570249182e4bd8
Dec 13 17:22:08.186 INFO [stdout] 
Dec 13 17:22:08.186 INFO [stdout] running 0 tests
Dec 13 17:22:08.186 INFO [stdout] 
Dec 13 17:22:08.186 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 17:22:08.186 INFO [stdout] 
Dec 13 17:22:08.188 INFO [stderr] su: No module specific data is present
Dec 13 17:22:08.464 INFO running `"docker" "inspect" "4238d7c50939b690dfccde22224d052ee7f2a53c8741da49d955407eb5b73cbc"`
Dec 13 17:22:08.568 INFO running `"docker" "rm" "-f" "4238d7c50939b690dfccde22224d052ee7f2a53c8741da49d955407eb5b73cbc"`
Dec 13 17:22:08.638 INFO [stdout] 4238d7c50939b690dfccde22224d052ee7f2a53c8741da49d955407eb5b73cbc