Dec 11 09:19:02.205 INFO checking slavovojacek/8QP_rust against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 09:19:02.205 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 09:19:02.725 INFO [stdout] ad480ad5a7f86c23ca13b8f1782f5fae72e76c96401749130a154d21fe79398f
Dec 11 09:19:02.727 INFO running `"docker" "start" "-a" "ad480ad5a7f86c23ca13b8f1782f5fae72e76c96401749130a154d21fe79398f"`
Dec 11 09:19:04.036 INFO [stderr] usermod: no changes
Dec 11 09:19:04.120 INFO [stderr]     Checking eight_queen_problem v0.1.0 (/source)
Dec 11 09:19:04.605 INFO [stderr] warning: value assigned to `empty_squares` is never read
Dec 11 09:19:04.605 INFO [stderr]   --> src/main.rs:20:13
Dec 11 09:19:04.605 INFO [stderr]    |
Dec 11 09:19:04.605 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Dec 11 09:19:04.605 INFO [stderr]    |             ^^^^^^^^^^^^^
Dec 11 09:19:04.605 INFO [stderr]    |
Dec 11 09:19:04.605 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 11 09:19:04.605 INFO [stderr] 
Dec 11 09:19:04.608 INFO [stderr] warning: unused variable: `r`
Dec 11 09:19:04.608 INFO [stderr]    --> src/main.rs:113:33
Dec 11 09:19:04.608 INFO [stderr]     |
Dec 11 09:19:04.608 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Dec 11 09:19:04.608 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Dec 11 09:19:04.608 INFO [stderr]     |
Dec 11 09:19:04.616 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 11 09:19:04.616 INFO [stderr] 
Dec 11 09:19:04.708 INFO [stderr] warning: value assigned to `empty_squares` is never read
Dec 11 09:19:04.708 INFO [stderr]   --> src/main.rs:20:13
Dec 11 09:19:04.708 INFO [stderr]    |
Dec 11 09:19:04.708 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Dec 11 09:19:04.708 INFO [stderr]    |             ^^^^^^^^^^^^^
Dec 11 09:19:04.708 INFO [stderr]    |
Dec 11 09:19:04.708 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 11 09:19:04.708 INFO [stderr] 
Dec 11 09:19:04.709 INFO [stderr] warning: unused variable: `r`
Dec 11 09:19:04.709 INFO [stderr]    --> src/main.rs:113:33
Dec 11 09:19:04.709 INFO [stderr]     |
Dec 11 09:19:04.709 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Dec 11 09:19:04.709 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Dec 11 09:19:04.709 INFO [stderr]     |
Dec 11 09:19:04.709 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 11 09:19:04.709 INFO [stderr] 
Dec 11 09:19:04.772 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
Dec 11 09:19:04.776 INFO [stderr] su: No module specific data is present
Dec 11 09:19:05.426 INFO running `"docker" "inspect" "ad480ad5a7f86c23ca13b8f1782f5fae72e76c96401749130a154d21fe79398f"`
Dec 11 09:19:05.786 INFO running `"docker" "rm" "-f" "ad480ad5a7f86c23ca13b8f1782f5fae72e76c96401749130a154d21fe79398f"`
Dec 11 09:19:06.140 INFO [stdout] ad480ad5a7f86c23ca13b8f1782f5fae72e76c96401749130a154d21fe79398f