Nov 29 18:00:44.497 INFO checking slavovojacek/8QP_rust against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 18:00:44.497 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-2/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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 29 18:00:45.015 INFO [stdout] 046a196fd08e5fa9c6c5d5f18fe998b60a7fba7c9c0eb6315503ddb707fb13e1
Nov 29 18:00:45.017 INFO running `"docker" "start" "-a" "046a196fd08e5fa9c6c5d5f18fe998b60a7fba7c9c0eb6315503ddb707fb13e1"`
Nov 29 18:00:46.395 INFO [stderr] usermod: no changes
Nov 29 18:00:46.504 INFO [stderr]     Checking libc v0.2.23
Nov 29 18:00:47.329 INFO [stderr]     Checking rand v0.3.15
Nov 29 18:00:48.692 INFO [stderr]     Checking eight_queen_problem v0.1.0 (/source)
Nov 29 18:00:49.026 INFO [stderr] warning: value assigned to `empty_squares` is never read
Nov 29 18:00:49.026 INFO [stderr]   --> src/main.rs:20:13
Nov 29 18:00:49.026 INFO [stderr]    |
Nov 29 18:00:49.026 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Nov 29 18:00:49.026 INFO [stderr]    |             ^^^^^^^^^^^^^
Nov 29 18:00:49.026 INFO [stderr]    |
Nov 29 18:00:49.026 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 29 18:00:49.026 INFO [stderr] 
Nov 29 18:00:49.026 INFO [stderr] warning: unused variable: `r`
Nov 29 18:00:49.026 INFO [stderr]    --> src/main.rs:113:33
Nov 29 18:00:49.026 INFO [stderr]     |
Nov 29 18:00:49.026 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Nov 29 18:00:49.026 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Nov 29 18:00:49.026 INFO [stderr]     |
Nov 29 18:00:49.026 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 29 18:00:49.026 INFO [stderr] 
Nov 29 18:00:49.172 INFO [stderr] warning: value assigned to `empty_squares` is never read
Nov 29 18:00:49.172 INFO [stderr]   --> src/main.rs:20:13
Nov 29 18:00:49.172 INFO [stderr]    |
Nov 29 18:00:49.172 INFO [stderr] 20 |     let mut empty_squares: Vec<Position> = Vec::new();
Nov 29 18:00:49.172 INFO [stderr]    |             ^^^^^^^^^^^^^
Nov 29 18:00:49.172 INFO [stderr]    |
Nov 29 18:00:49.172 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Nov 29 18:00:49.172 INFO [stderr] 
Nov 29 18:00:49.172 INFO [stderr] warning: unused variable: `r`
Nov 29 18:00:49.172 INFO [stderr]    --> src/main.rs:113:33
Nov 29 18:00:49.172 INFO [stderr]     |
Nov 29 18:00:49.172 INFO [stderr] 113 | fn fill_col(board: &mut Board, (r, c): Position) -> Result<(), Position> {
Nov 29 18:00:49.172 INFO [stderr]     |                                 ^ help: consider using `_r` instead
Nov 29 18:00:49.173 INFO [stderr]     |
Nov 29 18:00:49.173 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Nov 29 18:00:49.173 INFO [stderr] 
Nov 29 18:00:49.236 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.80s
Nov 29 18:00:49.236 INFO [stderr] su: No module specific data is present
Nov 29 18:00:49.785 INFO running `"docker" "inspect" "046a196fd08e5fa9c6c5d5f18fe998b60a7fba7c9c0eb6315503ddb707fb13e1"`
Nov 29 18:00:49.952 INFO running `"docker" "rm" "-f" "046a196fd08e5fa9c6c5d5f18fe998b60a7fba7c9c0eb6315503ddb707fb13e1"`
Nov 29 18:00:50.252 INFO [stdout] 046a196fd08e5fa9c6c5d5f18fe998b60a7fba7c9c0eb6315503ddb707fb13e1