Dec 04 23:17:58.983 INFO checking aacunningham/sudoku_ai_rust against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 23:17:58.983 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-2/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-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 04 23:17:59.475 INFO [stdout] 9e9832d5bb922e383961b54afbdd2b19833b57fe746db6a9b8ebe6d53dd6bbed
Dec 04 23:17:59.477 INFO running `"docker" "start" "-a" "9e9832d5bb922e383961b54afbdd2b19833b57fe746db6a9b8ebe6d53dd6bbed"`
Dec 04 23:18:00.427 INFO [stderr] usermod: no changes
Dec 04 23:18:00.464 INFO [stderr]     Checking sudoku_ai v0.1.0 (/source)
Dec 04 23:18:00.894 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 04 23:18:00.895 INFO [stderr]  --> src/lib.rs:1:12
Dec 04 23:18:00.895 INFO [stderr]   |
Dec 04 23:18:00.895 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 04 23:18:00.895 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 04 23:18:00.895 INFO [stderr]   |
Dec 04 23:18:00.895 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 23:18:00.895 INFO [stderr] 
Dec 04 23:18:00.962 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 04 23:18:00.962 INFO [stderr]  --> src/lib.rs:1:12
Dec 04 23:18:00.962 INFO [stderr]   |
Dec 04 23:18:00.962 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 04 23:18:00.962 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 04 23:18:00.962 INFO [stderr]   |
Dec 04 23:18:00.962 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 23:18:00.962 INFO [stderr] 
Dec 04 23:18:01.359 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
Dec 04 23:18:01.361 INFO [stderr] su: No module specific data is present
Dec 04 23:18:01.787 INFO running `"docker" "inspect" "9e9832d5bb922e383961b54afbdd2b19833b57fe746db6a9b8ebe6d53dd6bbed"`
Dec 04 23:18:02.161 INFO running `"docker" "rm" "-f" "9e9832d5bb922e383961b54afbdd2b19833b57fe746db6a9b8ebe6d53dd6bbed"`
Dec 04 23:18:02.378 INFO [stdout] 9e9832d5bb922e383961b54afbdd2b19833b57fe746db6a9b8ebe6d53dd6bbed