Dec 04 09:58:34.440 INFO checking slavovojacek/8QP_rust against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 09:58:34.440 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 09:58:34.847 INFO [stdout] 38d901acfd46b2445d98c045f5294eaa38fa2adc7e1b72c30bc29db45aca9d63
Dec 04 09:58:34.849 INFO running `"docker" "start" "-a" "38d901acfd46b2445d98c045f5294eaa38fa2adc7e1b72c30bc29db45aca9d63"`
Dec 04 09:58:35.687 INFO [stderr] usermod: no changes
Dec 04 09:58:35.723 INFO [stderr]     Checking eight_queen_problem v0.1.0 (/source)
Dec 04 09:58:35.995 INFO [stderr] warning: value assigned to `empty_squares` is never read
Dec 04 09:58:35.995 INFO [stderr]   --> src/main.rs:20:13
Dec 04 09:58:35.995 INFO [stderr]    |
Dec 04 09:58:35.995 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Dec 04 09:58:35.995 INFO [stderr]    |             ^^^^^^^^^^^^^
Dec 04 09:58:35.995 INFO [stderr]    |
Dec 04 09:58:35.995 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 04 09:58:35.995 INFO [stderr] 
Dec 04 09:58:35.995 INFO [stderr] warning: unused variable: `r`
Dec 04 09:58:35.995 INFO [stderr]    --> src/main.rs:113:33
Dec 04 09:58:35.995 INFO [stderr]     |
Dec 04 09:58:35.995 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Dec 04 09:58:35.995 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Dec 04 09:58:35.995 INFO [stderr]     |
Dec 04 09:58:35.995 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 04 09:58:35.995 INFO [stderr] 
Dec 04 09:58:36.067 INFO [stderr] warning: value assigned to `empty_squares` is never read
Dec 04 09:58:36.067 INFO [stderr]   --> src/main.rs:20:13
Dec 04 09:58:36.067 INFO [stderr]    |
Dec 04 09:58:36.067 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Dec 04 09:58:36.067 INFO [stderr]    |             ^^^^^^^^^^^^^
Dec 04 09:58:36.067 INFO [stderr]    |
Dec 04 09:58:36.067 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 04 09:58:36.067 INFO [stderr] 
Dec 04 09:58:36.067 INFO [stderr] warning: unused variable: `r`
Dec 04 09:58:36.067 INFO [stderr]    --> src/main.rs:113:33
Dec 04 09:58:36.067 INFO [stderr]     |
Dec 04 09:58:36.067 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Dec 04 09:58:36.067 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Dec 04 09:58:36.067 INFO [stderr]     |
Dec 04 09:58:36.067 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 04 09:58:36.067 INFO [stderr] 
Dec 04 09:58:36.107 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
Dec 04 09:58:36.110 INFO [stderr] su: No module specific data is present
Dec 04 09:58:36.552 INFO running `"docker" "inspect" "38d901acfd46b2445d98c045f5294eaa38fa2adc7e1b72c30bc29db45aca9d63"`
Dec 04 09:58:36.774 INFO running `"docker" "rm" "-f" "38d901acfd46b2445d98c045f5294eaa38fa2adc7e1b72c30bc29db45aca9d63"`
Dec 04 09:58:36.968 INFO [stdout] 38d901acfd46b2445d98c045f5294eaa38fa2adc7e1b72c30bc29db45aca9d63