Dec 11 21:27:21.169 INFO checking brinchj/rust-sudoku-fun against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 21:27:21.169 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-5/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 21:27:21.744 INFO [stdout] 3a51ae5b24c87de7b51b44395c2f24b2037a7551099856ad79d150fbda5cb338
Dec 11 21:27:21.746 INFO running `"docker" "start" "-a" "3a51ae5b24c87de7b51b44395c2f24b2037a7551099856ad79d150fbda5cb338"`
Dec 11 21:27:23.375 INFO [stderr] usermod: no changes
Dec 11 21:27:23.528 INFO [stderr]     Checking debug-builders v0.1.0
Dec 11 21:27:23.528 INFO [stderr]    Compiling debugtrace v0.1.0
Dec 11 21:27:23.530 INFO [stderr]     Checking either v0.1.7
Dec 11 21:27:23.540 INFO [stderr]     Checking conv v0.3.3
Dec 11 21:27:24.560 INFO [stderr]     Checking backtrace v0.1.8
Dec 11 21:27:26.878 INFO [stderr]     Checking chomp v0.3.1
Dec 11 21:27:28.720 INFO [stderr]     Checking sudokusolver v0.1.0 (/source)
Dec 11 21:27:30.576 INFO [stderr] warning: unused `#[macro_use]` import
Dec 11 21:27:30.576 INFO [stderr]  --> src/lib.rs:3:1
Dec 11 21:27:30.576 INFO [stderr]   |
Dec 11 21:27:30.576 INFO [stderr] 3 | #[macro_use]
Dec 11 21:27:30.576 INFO [stderr]   | ^^^^^^^^^^^^
Dec 11 21:27:30.576 INFO [stderr]   |
Dec 11 21:27:30.576 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 21:27:30.576 INFO [stderr] 
Dec 11 21:27:30.720 INFO [stderr] warning: unused `#[macro_use]` import
Dec 11 21:27:30.720 INFO [stderr]  --> src/lib.rs:3:1
Dec 11 21:27:30.720 INFO [stderr]   |
Dec 11 21:27:30.720 INFO [stderr] 3 | #[macro_use]
Dec 11 21:27:30.720 INFO [stderr]   | ^^^^^^^^^^^^
Dec 11 21:27:30.720 INFO [stderr]   |
Dec 11 21:27:30.720 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 21:27:30.720 INFO [stderr] 
Dec 11 21:27:30.880 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 11 21:27:30.880 INFO [stderr]  --> src/lib.rs:1:12
Dec 11 21:27:30.880 INFO [stderr]   |
Dec 11 21:27:30.880 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 11 21:27:30.880 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 11 21:27:30.880 INFO [stderr]   |
Dec 11 21:27:30.880 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 21:27:30.880 INFO [stderr] 
Dec 11 21:27:30.992 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 11 21:27:30.992 INFO [stderr]  --> src/lib.rs:1:12
Dec 11 21:27:30.992 INFO [stderr]   |
Dec 11 21:27:30.992 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 11 21:27:30.992 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 11 21:27:30.992 INFO [stderr]   |
Dec 11 21:27:30.992 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 21:27:30.992 INFO [stderr] 
Dec 11 21:27:32.532 INFO [stderr] warning: unused `#[macro_use]` import
Dec 11 21:27:32.532 INFO [stderr]  --> src/main.rs:3:1
Dec 11 21:27:32.532 INFO [stderr]   |
Dec 11 21:27:32.532 INFO [stderr] 3 | #[macro_use]
Dec 11 21:27:32.532 INFO [stderr]   | ^^^^^^^^^^^^
Dec 11 21:27:32.532 INFO [stderr]   |
Dec 11 21:27:32.532 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 21:27:32.532 INFO [stderr] 
Dec 11 21:27:32.668 INFO [stderr] warning: unused `#[macro_use]` import
Dec 11 21:27:32.668 INFO [stderr]  --> src/main.rs:3:1
Dec 11 21:27:32.668 INFO [stderr]   |
Dec 11 21:27:32.668 INFO [stderr] 3 | #[macro_use]
Dec 11 21:27:32.668 INFO [stderr]   | ^^^^^^^^^^^^
Dec 11 21:27:32.668 INFO [stderr]   |
Dec 11 21:27:32.668 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 21:27:32.668 INFO [stderr] 
Dec 11 21:27:32.867 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 11 21:27:32.867 INFO [stderr]  --> src/main.rs:1:12
Dec 11 21:27:32.867 INFO [stderr]   |
Dec 11 21:27:32.867 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 11 21:27:32.867 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 11 21:27:32.867 INFO [stderr]   |
Dec 11 21:27:32.867 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 21:27:32.867 INFO [stderr] 
Dec 11 21:27:32.976 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 11 21:27:32.976 INFO [stderr]  --> src/main.rs:1:12
Dec 11 21:27:32.976 INFO [stderr]   |
Dec 11 21:27:32.976 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 11 21:27:32.976 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 11 21:27:32.976 INFO [stderr]   |
Dec 11 21:27:32.976 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 11 21:27:32.976 INFO [stderr] 
Dec 11 21:27:33.013 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.59s
Dec 11 21:27:33.026 INFO [stderr] su: No module specific data is present
Dec 11 21:27:34.502 INFO running `"docker" "inspect" "3a51ae5b24c87de7b51b44395c2f24b2037a7551099856ad79d150fbda5cb338"`
Dec 11 21:27:34.894 INFO running `"docker" "rm" "-f" "3a51ae5b24c87de7b51b44395c2f24b2037a7551099856ad79d150fbda5cb338"`
Dec 11 21:27:35.212 INFO [stdout] 3a51ae5b24c87de7b51b44395c2f24b2037a7551099856ad79d150fbda5cb338