Nov 27 20:13:39.021 INFO checking slavovojacek/8QP_rust against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 20:13:39.021 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-6/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 27 20:13:39.400 INFO [stdout] 67669be46bbbe180d8c631beae1ecde2266c17c6d92c3a2c19d3b2750e0bd68b
Nov 27 20:13:39.401 INFO running `"docker" "start" "-a" "67669be46bbbe180d8c631beae1ecde2266c17c6d92c3a2c19d3b2750e0bd68b"`
Nov 27 20:13:40.568 INFO [stderr] usermod: no changes
Nov 27 20:13:40.664 INFO [stderr]     Checking eight_queen_problem v0.1.0 (/source)
Nov 27 20:13:41.101 INFO [stderr] warning: value assigned to `empty_squares` is never read
Nov 27 20:13:41.101 INFO [stderr]   --> src/main.rs:20:13
Nov 27 20:13:41.101 INFO [stderr]    |
Nov 27 20:13:41.101 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Nov 27 20:13:41.102 INFO [stderr]    |             ^^^^^^^^^^^^^
Nov 27 20:13:41.102 INFO [stderr]    |
Nov 27 20:13:41.102 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 27 20:13:41.103 INFO [stderr] 
Nov 27 20:13:41.110 INFO [stderr] warning: unused variable: `r`
Nov 27 20:13:41.110 INFO [stderr]    --> src/main.rs:113:33
Nov 27 20:13:41.110 INFO [stderr]     |
Nov 27 20:13:41.111 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Nov 27 20:13:41.111 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Nov 27 20:13:41.111 INFO [stderr]     |
Nov 27 20:13:41.112 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 27 20:13:41.112 INFO [stderr] 
Nov 27 20:13:41.140 INFO [stderr] warning: value assigned to `empty_squares` is never read
Nov 27 20:13:41.141 INFO [stderr]   --> src/main.rs:20:13
Nov 27 20:13:41.141 INFO [stderr]    |
Nov 27 20:13:41.141 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Nov 27 20:13:41.142 INFO [stderr]    |             ^^^^^^^^^^^^^
Nov 27 20:13:41.142 INFO [stderr]    |
Nov 27 20:13:41.142 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 27 20:13:41.143 INFO [stderr] 
Nov 27 20:13:41.143 INFO [stderr] warning: unused variable: `r`
Nov 27 20:13:41.143 INFO [stderr]    --> src/main.rs:113:33
Nov 27 20:13:41.143 INFO [stderr]     |
Nov 27 20:13:41.144 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Nov 27 20:13:41.144 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Nov 27 20:13:41.144 INFO [stderr]     |
Nov 27 20:13:41.145 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 27 20:13:41.145 INFO [stderr] 
Nov 27 20:13:41.176 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
Nov 27 20:13:41.184 INFO [stderr] su: No module specific data is present
Nov 27 20:13:41.786 INFO running `"docker" "inspect" "67669be46bbbe180d8c631beae1ecde2266c17c6d92c3a2c19d3b2750e0bd68b"`
Nov 27 20:13:42.082 INFO running `"docker" "rm" "-f" "67669be46bbbe180d8c631beae1ecde2266c17c6d92c3a2c19d3b2750e0bd68b"`
Nov 27 20:13:42.412 INFO [stdout] 67669be46bbbe180d8c631beae1ecde2266c17c6d92c3a2c19d3b2750e0bd68b