Nov 28 08:21:46.035 INFO checking brinchj/rust-sudoku-fun against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 08:21:46.036 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-4/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 28 08:21:46.431 INFO [stdout] bc15d1e8c6ea782800079225d5eaa75f568be3aaf052ae2fe52285db226188bd
Nov 28 08:21:46.434 INFO running `"docker" "start" "-a" "bc15d1e8c6ea782800079225d5eaa75f568be3aaf052ae2fe52285db226188bd"`
Nov 28 08:21:47.802 INFO [stderr] usermod: no changes
Nov 28 08:21:47.940 INFO [stderr]    Compiling debugtrace v0.1.0
Nov 28 08:21:47.940 INFO [stderr]     Checking either v0.1.7
Nov 28 08:21:47.940 INFO [stderr]     Checking conv v0.3.3
Nov 28 08:21:47.977 INFO [stderr]     Checking backtrace v0.1.8
Nov 28 08:21:51.438 INFO [stderr]     Checking chomp v0.3.1
Nov 28 08:21:53.427 INFO [stderr]     Checking sudokusolver v0.1.0 (/source)
Nov 28 08:21:55.364 INFO [stderr] warning: unused `#[macro_use]` import
Nov 28 08:21:55.365 INFO [stderr]  --> src/lib.rs:3:1
Nov 28 08:21:55.366 INFO [stderr]   |
Nov 28 08:21:55.367 INFO [stderr] 3 | #[macro_use]
Nov 28 08:21:55.367 INFO [stderr]   | ^^^^^^^^^^^^
Nov 28 08:21:55.368 INFO [stderr]   |
Nov 28 08:21:55.368 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 08:21:55.369 INFO [stderr] 
Nov 28 08:21:55.436 INFO [stderr] warning: unused `#[macro_use]` import
Nov 28 08:21:55.437 INFO [stderr]  --> src/lib.rs:3:1
Nov 28 08:21:55.438 INFO [stderr]   |
Nov 28 08:21:55.438 INFO [stderr] 3 | #[macro_use]
Nov 28 08:21:55.439 INFO [stderr]   | ^^^^^^^^^^^^
Nov 28 08:21:55.439 INFO [stderr]   |
Nov 28 08:21:55.440 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 08:21:55.440 INFO [stderr] 
Nov 28 08:21:55.681 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 08:21:55.682 INFO [stderr]  --> src/lib.rs:1:12
Nov 28 08:21:55.682 INFO [stderr]   |
Nov 28 08:21:55.683 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 08:21:55.684 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 08:21:55.684 INFO [stderr]   |
Nov 28 08:21:55.685 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 08:21:55.685 INFO [stderr] 
Nov 28 08:21:55.888 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 08:21:55.888 INFO [stderr]  --> src/lib.rs:1:12
Nov 28 08:21:55.888 INFO [stderr]   |
Nov 28 08:21:55.888 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 08:21:55.888 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 08:21:55.888 INFO [stderr]   |
Nov 28 08:21:55.888 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 08:21:55.888 INFO [stderr] 
Nov 28 08:21:57.277 INFO [stderr] warning: unused `#[macro_use]` import
Nov 28 08:21:57.279 INFO [stderr]  --> src/main.rs:3:1
Nov 28 08:21:57.279 INFO [stderr]   |
Nov 28 08:21:57.279 INFO [stderr] 3 | #[macro_use]
Nov 28 08:21:57.280 INFO [stderr]   | ^^^^^^^^^^^^
Nov 28 08:21:57.280 INFO [stderr]   |
Nov 28 08:21:57.280 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 08:21:57.280 INFO [stderr] 
Nov 28 08:21:57.415 INFO [stderr] warning: unused `#[macro_use]` import
Nov 28 08:21:57.416 INFO [stderr]  --> src/main.rs:3:1
Nov 28 08:21:57.416 INFO [stderr]   |
Nov 28 08:21:57.417 INFO [stderr] 3 | #[macro_use]
Nov 28 08:21:57.417 INFO [stderr]   | ^^^^^^^^^^^^
Nov 28 08:21:57.420 INFO [stderr]   |
Nov 28 08:21:57.421 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 08:21:57.421 INFO [stderr] 
Nov 28 08:21:57.535 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 08:21:57.536 INFO [stderr]  --> src/main.rs:1:12
Nov 28 08:21:57.537 INFO [stderr]   |
Nov 28 08:21:57.540 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 08:21:57.541 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 08:21:57.541 INFO [stderr]   |
Nov 28 08:21:57.541 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 08:21:57.541 INFO [stderr] 
Nov 28 08:21:57.739 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 08:21:57.740 INFO [stderr]  --> src/main.rs:1:12
Nov 28 08:21:57.740 INFO [stderr]   |
Nov 28 08:21:57.740 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 08:21:57.740 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 08:21:57.741 INFO [stderr]   |
Nov 28 08:21:57.741 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 08:21:57.741 INFO [stderr] 
Nov 28 08:21:57.770 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.95s
Nov 28 08:21:57.775 INFO [stderr] su: No module specific data is present
Nov 28 08:21:58.874 INFO running `"docker" "inspect" "bc15d1e8c6ea782800079225d5eaa75f568be3aaf052ae2fe52285db226188bd"`
Nov 28 08:21:59.276 INFO running `"docker" "rm" "-f" "bc15d1e8c6ea782800079225d5eaa75f568be3aaf052ae2fe52285db226188bd"`
Nov 28 08:21:59.636 INFO [stdout] bc15d1e8c6ea782800079225d5eaa75f568be3aaf052ae2fe52285db226188bd