Oct 12 13:30:25.165 INFO checking slavovojacek/8QP_rust against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 13:30:25.165 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-2/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 12 13:30:25.656 INFO blam! 3acf7fbd7d63e1cbf93b8566cc479ca4430bd56e7c46198abb998f2a6107b67e
Oct 12 13:30:25.666 INFO running `"docker" "start" "-a" "3acf7fbd7d63e1cbf93b8566cc479ca4430bd56e7c46198abb998f2a6107b67e"`
Oct 12 13:30:26.783 INFO kablam! usermod: no changes
Oct 12 13:30:26.844 INFO kablam!     Checking rand v0.3.15
Oct 12 13:30:28.288 INFO kablam!     Checking eight_queen_problem v0.1.0 (/source)
Oct 12 13:30:28.652 INFO kablam! warning: value assigned to `empty_squares` is never read
Oct 12 13:30:28.652 INFO kablam!   --> src/main.rs:20:13
Oct 12 13:30:28.652 INFO kablam!    |
Oct 12 13:30:28.652 INFO kablam! 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Oct 12 13:30:28.652 INFO kablam!    |             ^^^^^^^^^^^^^
Oct 12 13:30:28.652 INFO kablam!    |
Oct 12 13:30:28.652 INFO kablam!    = note: #[warn(unused_assignments)] on by default
Oct 12 13:30:28.652 INFO kablam! 
Oct 12 13:30:28.652 INFO kablam! warning: unused variable: `r`
Oct 12 13:30:28.652 INFO kablam!    --> src/main.rs:113:33
Oct 12 13:30:28.652 INFO kablam!     |
Oct 12 13:30:28.652 INFO kablam! 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Oct 12 13:30:28.652 INFO kablam!     |                                 ^ help: consider using `_r` instead
Oct 12 13:30:28.652 INFO kablam!     |
Oct 12 13:30:28.662 INFO kablam!     = note: #[warn(unused_variables)] on by default
Oct 12 13:30:28.662 INFO kablam! 
Oct 12 13:30:28.696 INFO kablam! warning: value assigned to `empty_squares` is never read
Oct 12 13:30:28.696 INFO kablam!   --> src/main.rs:20:13
Oct 12 13:30:28.696 INFO kablam!    |
Oct 12 13:30:28.696 INFO kablam! 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Oct 12 13:30:28.696 INFO kablam!    |             ^^^^^^^^^^^^^
Oct 12 13:30:28.696 INFO kablam!    |
Oct 12 13:30:28.696 INFO kablam!    = note: #[warn(unused_assignments)] on by default
Oct 12 13:30:28.696 INFO kablam! 
Oct 12 13:30:28.696 INFO kablam! warning: unused variable: `r`
Oct 12 13:30:28.696 INFO kablam!    --> src/main.rs:113:33
Oct 12 13:30:28.696 INFO kablam!     |
Oct 12 13:30:28.696 INFO kablam! 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Oct 12 13:30:28.696 INFO kablam!     |                                 ^ help: consider using `_r` instead
Oct 12 13:30:28.696 INFO kablam!     |
Oct 12 13:30:28.696 INFO kablam!     = note: #[warn(unused_variables)] on by default
Oct 12 13:30:28.696 INFO kablam! 
Oct 12 13:30:28.748 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
Oct 12 13:30:28.748 INFO kablam! su: No module specific data is present
Oct 12 13:30:29.418 INFO running `"docker" "rm" "-f" "3acf7fbd7d63e1cbf93b8566cc479ca4430bd56e7c46198abb998f2a6107b67e"`
Oct 12 13:30:29.690 INFO blam! 3acf7fbd7d63e1cbf93b8566cc479ca4430bd56e7c46198abb998f2a6107b67e