Dec 04 21:31:01.165 INFO checking brinchj/rust-sudoku-fun against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 21:31:01.165 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-6/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 21:31:01.616 INFO [stdout] 278402e89eff2bf7cf1cfa58485592cd1d23921677dec62e601b33a5d964f416
Dec 04 21:31:01.621 INFO running `"docker" "start" "-a" "278402e89eff2bf7cf1cfa58485592cd1d23921677dec62e601b33a5d964f416"`
Dec 04 21:31:03.183 INFO [stderr] usermod: no changes
Dec 04 21:31:03.312 INFO [stderr]    Compiling im v10.2.0
Dec 04 21:31:03.319 INFO [stderr]     Checking backtrace v0.1.8
Dec 04 21:31:04.368 INFO [stderr]     Checking debugtrace v0.1.0
Dec 04 21:31:05.688 INFO [stderr]     Checking chomp v0.3.1
Dec 04 21:31:09.299 INFO [stderr]     Checking sudokusolver v0.1.0 (/source)
Dec 04 21:31:11.389 INFO [stderr] warning: unused `#[macro_use]` import
Dec 04 21:31:11.389 INFO [stderr]  --> src/lib.rs:3:1
Dec 04 21:31:11.389 INFO [stderr]   |
Dec 04 21:31:11.389 INFO [stderr] 3 | #[macro_use]
Dec 04 21:31:11.389 INFO [stderr]   | ^^^^^^^^^^^^
Dec 04 21:31:11.389 INFO [stderr]   |
Dec 04 21:31:11.389 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 21:31:11.389 INFO [stderr] 
Dec 04 21:31:11.415 INFO [stderr] warning: unused `#[macro_use]` import
Dec 04 21:31:11.415 INFO [stderr]  --> src/lib.rs:3:1
Dec 04 21:31:11.415 INFO [stderr]   |
Dec 04 21:31:11.415 INFO [stderr] 3 | #[macro_use]
Dec 04 21:31:11.415 INFO [stderr]   | ^^^^^^^^^^^^
Dec 04 21:31:11.415 INFO [stderr]   |
Dec 04 21:31:11.416 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 21:31:11.416 INFO [stderr] 
Dec 04 21:31:11.743 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 21:31:11.743 INFO [stderr]  --> src/lib.rs:1:12
Dec 04 21:31:11.744 INFO [stderr]   |
Dec 04 21:31:11.744 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 04 21:31:11.744 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 04 21:31:11.745 INFO [stderr]   |
Dec 04 21:31:11.745 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 21:31:11.745 INFO [stderr] 
Dec 04 21:31:12.014 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 21:31:12.014 INFO [stderr]  --> src/lib.rs:1:12
Dec 04 21:31:12.015 INFO [stderr]   |
Dec 04 21:31:12.015 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 04 21:31:12.015 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 04 21:31:12.016 INFO [stderr]   |
Dec 04 21:31:12.016 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 21:31:12.016 INFO [stderr] 
Dec 04 21:31:13.251 INFO [stderr] warning: unused `#[macro_use]` import
Dec 04 21:31:13.251 INFO [stderr]  --> src/main.rs:3:1
Dec 04 21:31:13.251 INFO [stderr]   |
Dec 04 21:31:13.251 INFO [stderr] 3 | #[macro_use]
Dec 04 21:31:13.251 INFO [stderr]   | ^^^^^^^^^^^^
Dec 04 21:31:13.251 INFO [stderr]   |
Dec 04 21:31:13.251 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 21:31:13.251 INFO [stderr] 
Dec 04 21:31:13.267 INFO [stderr] warning: unused `#[macro_use]` import
Dec 04 21:31:13.267 INFO [stderr]  --> src/main.rs:3:1
Dec 04 21:31:13.267 INFO [stderr]   |
Dec 04 21:31:13.267 INFO [stderr] 3 | #[macro_use]
Dec 04 21:31:13.267 INFO [stderr]   | ^^^^^^^^^^^^
Dec 04 21:31:13.267 INFO [stderr]   |
Dec 04 21:31:13.267 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 21:31:13.267 INFO [stderr] 
Dec 04 21:31:13.423 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 21:31:13.423 INFO [stderr]  --> src/main.rs:1:12
Dec 04 21:31:13.423 INFO [stderr]   |
Dec 04 21:31:13.423 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 04 21:31:13.423 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 04 21:31:13.423 INFO [stderr]   |
Dec 04 21:31:13.423 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 21:31:13.423 INFO [stderr] 
Dec 04 21:31:13.527 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 21:31:13.527 INFO [stderr]  --> src/main.rs:1:12
Dec 04 21:31:13.527 INFO [stderr]   |
Dec 04 21:31:13.527 INFO [stderr] 1 | #![feature(iterator_step_by)]
Dec 04 21:31:13.527 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 04 21:31:13.527 INFO [stderr]   |
Dec 04 21:31:13.527 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 04 21:31:13.527 INFO [stderr] 
Dec 04 21:31:13.547 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.34s
Dec 04 21:31:13.563 INFO [stderr] su: No module specific data is present
Dec 04 21:31:14.353 INFO running `"docker" "inspect" "278402e89eff2bf7cf1cfa58485592cd1d23921677dec62e601b33a5d964f416"`
Dec 04 21:31:14.707 INFO running `"docker" "rm" "-f" "278402e89eff2bf7cf1cfa58485592cd1d23921677dec62e601b33a5d964f416"`
Dec 04 21:31:14.962 INFO [stdout] 278402e89eff2bf7cf1cfa58485592cd1d23921677dec62e601b33a5d964f416