Dec 19 19:33:38.776 INFO checking brinchj/rust-sudoku-fun against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:33:38.776 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/brinchj/rust-sudoku-fun:/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 19:33:39.167 INFO [stdout] f9b86c2324b6a22b94392e5338104213aa64b4e3097986bb0d51989c15561be1
Dec 19 19:33:39.176 INFO running `"docker" "start" "-a" "f9b86c2324b6a22b94392e5338104213aa64b4e3097986bb0d51989c15561be1"`
Dec 19 19:33:40.820 INFO [stderr]    Compiling im v10.2.0
Dec 19 19:33:40.820 INFO [stderr]     Checking backtrace v0.1.8
Dec 19 19:33:41.673 INFO [stderr]     Checking debugtrace v0.1.0
Dec 19 19:33:42.645 INFO [stderr]     Checking chomp v0.3.1
Dec 19 19:33:45.682 INFO [stderr]     Checking sudokusolver v0.1.0 (/opt/crater/workdir)
Dec 19 19:33:46.436 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 19:33:46.436 INFO [stderr]  --> src/lib.rs:3:1
Dec 19 19:33:46.436 INFO [stderr]   |
Dec 19 19:33:46.436 INFO [stderr] 3 | #[macro_use]
Dec 19 19:33:46.436 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 19:33:46.436 INFO [stderr]   |
Dec 19 19:33:46.436 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:33:46.436 INFO [stderr] 
Dec 19 19:33:46.446 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 19:33:46.446 INFO [stderr]  --> src/lib.rs:3:1
Dec 19 19:33:46.446 INFO [stderr]   |
Dec 19 19:33:46.446 INFO [stderr] 3 | #[macro_use]
Dec 19 19:33:46.446 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 19:33:46.446 INFO [stderr]   |
Dec 19 19:33:46.446 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:33:46.446 INFO [stderr] 
Dec 19 19:33:46.590 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 19:33:46.590 INFO [stderr]  --> src/lib.rs:1:12
Dec 19 19:33:46.590 INFO [stderr]   |
Dec 19 19:33:46.590 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 19 19:33:46.590 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 19:33:46.590 INFO [stderr]   |
Dec 19 19:33:46.590 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 19:33:46.590 INFO [stderr] 
Dec 19 19:33:46.868 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 19:33:46.868 INFO [stderr]  --> src/lib.rs:1:12
Dec 19 19:33:46.868 INFO [stderr]   |
Dec 19 19:33:46.868 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 19 19:33:46.868 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 19:33:46.868 INFO [stderr]   |
Dec 19 19:33:46.868 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 19:33:46.868 INFO [stderr] 
Dec 19 19:33:47.440 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 19:33:47.440 INFO [stderr]  --> src/main.rs:3:1
Dec 19 19:33:47.440 INFO [stderr]   |
Dec 19 19:33:47.440 INFO [stderr] 3 | #[macro_use]
Dec 19 19:33:47.440 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 19:33:47.440 INFO [stderr]   |
Dec 19 19:33:47.440 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:33:47.440 INFO [stderr] 
Dec 19 19:33:47.624 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 19:33:47.624 INFO [stderr]  --> src/main.rs:1:12
Dec 19 19:33:47.624 INFO [stderr]   |
Dec 19 19:33:47.624 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 19 19:33:47.624 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 19:33:47.624 INFO [stderr]   |
Dec 19 19:33:47.624 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 19:33:47.624 INFO [stderr] 
Dec 19 19:33:47.744 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 19:33:47.744 INFO [stderr]  --> src/main.rs:3:1
Dec 19 19:33:47.744 INFO [stderr]   |
Dec 19 19:33:47.744 INFO [stderr] 3 | #[macro_use]
Dec 19 19:33:47.744 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 19:33:47.744 INFO [stderr]   |
Dec 19 19:33:47.744 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:33:47.744 INFO [stderr] 
Dec 19 19:33:47.956 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 19:33:47.956 INFO [stderr]  --> src/main.rs:1:12
Dec 19 19:33:47.956 INFO [stderr]   |
Dec 19 19:33:47.956 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 19 19:33:47.956 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 19:33:47.956 INFO [stderr]   |
Dec 19 19:33:47.956 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 19:33:47.956 INFO [stderr] 
Dec 19 19:33:47.994 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.29s
Dec 19 19:33:48.888 INFO running `"docker" "inspect" "f9b86c2324b6a22b94392e5338104213aa64b4e3097986bb0d51989c15561be1"`
Dec 19 19:33:49.060 INFO running `"docker" "rm" "-f" "f9b86c2324b6a22b94392e5338104213aa64b4e3097986bb0d51989c15561be1"`
Dec 19 19:33:49.470 INFO [stdout] f9b86c2324b6a22b94392e5338104213aa64b4e3097986bb0d51989c15561be1