Dec 11 20:15:27.699 INFO checking daemanos/sudoku against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 20:15:27.699 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 20:15:28.076 INFO [stdout] 216a9bfa43dda4687c39b14ec5e1aa1850f2843cb844b8246c1516aaadec69c6
Dec 11 20:15:28.080 INFO running `"docker" "start" "-a" "216a9bfa43dda4687c39b14ec5e1aa1850f2843cb844b8246c1516aaadec69c6"`
Dec 11 20:15:28.961 INFO [stderr] usermod: no changes
Dec 11 20:15:29.084 INFO [stderr]     Checking sudoku v0.1.0 (/source)
Dec 11 20:15:29.604 INFO [stderr] warning: unused variable: `grid`
Dec 11 20:15:29.604 INFO [stderr]   --> src/main.rs:82:9
Dec 11 20:15:29.604 INFO [stderr]    |
Dec 11 20:15:29.604 INFO [stderr] 82 |     let grid = match read_grid(&path) {
Dec 11 20:15:29.604 INFO [stderr]    |         ^^^^ help: consider using `_grid` instead
Dec 11 20:15:29.604 INFO [stderr]    |
Dec 11 20:15:29.604 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 20:15:29.604 INFO [stderr] 
Dec 11 20:15:29.612 INFO [stderr] warning: field is never used: `fixed`
Dec 11 20:15:29.612 INFO [stderr]  --> src/main.rs:9:5
Dec 11 20:15:29.612 INFO [stderr]   |
Dec 11 20:15:29.612 INFO [stderr] 9 |     fixed: bool,
Dec 11 20:15:29.612 INFO [stderr]   |     ^^^^^^^^^^^
Dec 11 20:15:29.612 INFO [stderr]   |
Dec 11 20:15:29.612 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 20:15:29.612 INFO [stderr] 
Dec 11 20:15:29.612 INFO [stderr] warning: field is never used: `val`
Dec 11 20:15:29.612 INFO [stderr]   --> src/main.rs:10:5
Dec 11 20:15:29.612 INFO [stderr]    |
Dec 11 20:15:29.612 INFO [stderr] 10 |     val: i8,
Dec 11 20:15:29.612 INFO [stderr]    |     ^^^^^^^
Dec 11 20:15:29.612 INFO [stderr] 
Dec 11 20:15:29.612 INFO [stderr] warning: field is never used: `size`
Dec 11 20:15:29.612 INFO [stderr]   --> src/main.rs:14:5
Dec 11 20:15:29.612 INFO [stderr]    |
Dec 11 20:15:29.612 INFO [stderr] 14 |     size: i8,
Dec 11 20:15:29.612 INFO [stderr]    |     ^^^^^^^^
Dec 11 20:15:29.612 INFO [stderr] 
Dec 11 20:15:29.612 INFO [stderr] warning: field is never used: `block_size`
Dec 11 20:15:29.613 INFO [stderr]   --> src/main.rs:15:5
Dec 11 20:15:29.613 INFO [stderr]    |
Dec 11 20:15:29.613 INFO [stderr] 15 |     block_size: i8,
Dec 11 20:15:29.613 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 11 20:15:29.613 INFO [stderr] 
Dec 11 20:15:29.613 INFO [stderr] warning: field is never used: `data`
Dec 11 20:15:29.613 INFO [stderr]   --> src/main.rs:16:5
Dec 11 20:15:29.613 INFO [stderr]    |
Dec 11 20:15:29.613 INFO [stderr] 16 |     data: Vec<Vec<Cell>>,
Dec 11 20:15:29.613 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 20:15:29.613 INFO [stderr] 
Dec 11 20:15:29.625 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 20:15:29.625 INFO [stderr]   --> src/main.rs:36:5
Dec 11 20:15:29.625 INFO [stderr]    |
Dec 11 20:15:29.625 INFO [stderr] 36 |     file.read_to_string(&mut contents);
Dec 11 20:15:29.625 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:15:29.625 INFO [stderr]    |
Dec 11 20:15:29.625 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 20:15:29.625 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 20:15:29.626 INFO [stderr] 
Dec 11 20:15:29.708 INFO [stderr] warning: unused variable: `grid`
Dec 11 20:15:29.708 INFO [stderr]   --> src/main.rs:82:9
Dec 11 20:15:29.708 INFO [stderr]    |
Dec 11 20:15:29.708 INFO [stderr] 82 |     let grid = match read_grid(&path) {
Dec 11 20:15:29.708 INFO [stderr]    |         ^^^^ help: consider using `_grid` instead
Dec 11 20:15:29.708 INFO [stderr]    |
Dec 11 20:15:29.708 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 20:15:29.708 INFO [stderr] 
Dec 11 20:15:29.725 INFO [stderr] warning: field is never used: `fixed`
Dec 11 20:15:29.725 INFO [stderr]  --> src/main.rs:9:5
Dec 11 20:15:29.725 INFO [stderr]   |
Dec 11 20:15:29.725 INFO [stderr] 9 |     fixed: bool,
Dec 11 20:15:29.725 INFO [stderr]   |     ^^^^^^^^^^^
Dec 11 20:15:29.725 INFO [stderr]   |
Dec 11 20:15:29.725 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 20:15:29.725 INFO [stderr] 
Dec 11 20:15:29.725 INFO [stderr] warning: field is never used: `val`
Dec 11 20:15:29.725 INFO [stderr]   --> src/main.rs:10:5
Dec 11 20:15:29.725 INFO [stderr]    |
Dec 11 20:15:29.725 INFO [stderr] 10 |     val: i8,
Dec 11 20:15:29.725 INFO [stderr]    |     ^^^^^^^
Dec 11 20:15:29.725 INFO [stderr] 
Dec 11 20:15:29.725 INFO [stderr] warning: field is never used: `size`
Dec 11 20:15:29.725 INFO [stderr]   --> src/main.rs:14:5
Dec 11 20:15:29.725 INFO [stderr]    |
Dec 11 20:15:29.725 INFO [stderr] 14 |     size: i8,
Dec 11 20:15:29.725 INFO [stderr]    |     ^^^^^^^^
Dec 11 20:15:29.725 INFO [stderr] 
Dec 11 20:15:29.725 INFO [stderr] warning: field is never used: `block_size`
Dec 11 20:15:29.725 INFO [stderr]   --> src/main.rs:15:5
Dec 11 20:15:29.725 INFO [stderr]    |
Dec 11 20:15:29.725 INFO [stderr] 15 |     block_size: i8,
Dec 11 20:15:29.725 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 11 20:15:29.725 INFO [stderr] 
Dec 11 20:15:29.725 INFO [stderr] warning: field is never used: `data`
Dec 11 20:15:29.725 INFO [stderr]   --> src/main.rs:16:5
Dec 11 20:15:29.725 INFO [stderr]    |
Dec 11 20:15:29.725 INFO [stderr] 16 |     data: Vec<Vec<Cell>>,
Dec 11 20:15:29.725 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 11 20:15:29.725 INFO [stderr] 
Dec 11 20:15:29.725 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 20:15:29.725 INFO [stderr]   --> src/main.rs:36:5
Dec 11 20:15:29.725 INFO [stderr]    |
Dec 11 20:15:29.725 INFO [stderr] 36 |     file.read_to_string(&mut contents);
Dec 11 20:15:29.725 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 20:15:29.725 INFO [stderr]    |
Dec 11 20:15:29.725 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 20:15:29.725 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 20:15:29.725 INFO [stderr] 
Dec 11 20:15:29.752 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Dec 11 20:15:29.752 INFO [stderr] su: No module specific data is present
Dec 11 20:15:30.252 INFO running `"docker" "inspect" "216a9bfa43dda4687c39b14ec5e1aa1850f2843cb844b8246c1516aaadec69c6"`
Dec 11 20:15:30.474 INFO running `"docker" "rm" "-f" "216a9bfa43dda4687c39b14ec5e1aa1850f2843cb844b8246c1516aaadec69c6"`
Dec 11 20:15:30.756 INFO [stdout] 216a9bfa43dda4687c39b14ec5e1aa1850f2843cb844b8246c1516aaadec69c6