Nov 28 05:03:13.942 INFO checking garyemerson/queens_on_board against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 05:03:13.944 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-0/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 28 05:03:14.428 INFO [stdout] f61227b2cae0475ec2041dbf1d13d5eacab693e306a104c337cca4d628e9e0bf
Nov 28 05:03:14.434 INFO running `"docker" "start" "-a" "f61227b2cae0475ec2041dbf1d13d5eacab693e306a104c337cca4d628e9e0bf"`
Nov 28 05:03:15.856 INFO [stderr] usermod: no changes
Nov 28 05:03:15.916 INFO [stderr]     Checking queens_on_board v0.1.0 (/source)
Nov 28 05:03:16.467 INFO [stderr] warning: unused variable: `test_case_num`
Nov 28 05:03:16.467 INFO [stderr]   --> src/main.rs:10:9
Nov 28 05:03:16.467 INFO [stderr]    |
Nov 28 05:03:16.467 INFO [stderr] 10 |     for test_case_num in 0..num_test_cases {
Nov 28 05:03:16.468 INFO [stderr]    |         ^^^^^^^^^^^^^ help: consider using `_test_case_num` instead
Nov 28 05:03:16.468 INFO [stderr]    |
Nov 28 05:03:16.468 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 28 05:03:16.468 INFO [stderr] 
Nov 28 05:03:16.468 INFO [stderr] warning: unused variable: `all_placements`
Nov 28 05:03:16.468 INFO [stderr]   --> src/main.rs:47:13
Nov 28 05:03:16.468 INFO [stderr]    |
Nov 28 05:03:16.468 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Nov 28 05:03:16.468 INFO [stderr]    |             ^^^^^^^^^^^^^^ help: consider using `_all_placements` instead
Nov 28 05:03:16.468 INFO [stderr] 
Nov 28 05:03:16.468 INFO [stderr] warning: unused variable: `rows`
Nov 28 05:03:16.468 INFO [stderr]   --> src/main.rs:87:19
Nov 28 05:03:16.468 INFO [stderr]    |
Nov 28 05:03:16.468 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Nov 28 05:03:16.468 INFO [stderr]    |                   ^^^^ help: consider using `_rows` instead
Nov 28 05:03:16.468 INFO [stderr] 
Nov 28 05:03:16.472 INFO [stderr] warning: variable does not need to be mutable
Nov 28 05:03:16.472 INFO [stderr]   --> src/main.rs:47:9
Nov 28 05:03:16.472 INFO [stderr]    |
Nov 28 05:03:16.472 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Nov 28 05:03:16.472 INFO [stderr]    |         ----^^^^^^^^^^^^^^
Nov 28 05:03:16.472 INFO [stderr]    |         |
Nov 28 05:03:16.472 INFO [stderr]    |         help: remove this `mut`
Nov 28 05:03:16.472 INFO [stderr]    |
Nov 28 05:03:16.472 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 05:03:16.472 INFO [stderr] 
Nov 28 05:03:16.508 INFO [stderr] warning: function is never used: `solve`
Nov 28 05:03:16.508 INFO [stderr]   --> src/main.rs:46:1
Nov 28 05:03:16.508 INFO [stderr]    |
Nov 28 05:03:16.509 INFO [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize {
Nov 28 05:03:16.509 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.509 INFO [stderr]    |
Nov 28 05:03:16.510 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 28 05:03:16.510 INFO [stderr] 
Nov 28 05:03:16.510 INFO [stderr] warning: function is never used: `print_in_order`
Nov 28 05:03:16.510 INFO [stderr]   --> src/main.rs:87:1
Nov 28 05:03:16.511 INFO [stderr]    |
Nov 28 05:03:16.511 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Nov 28 05:03:16.511 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.512 INFO [stderr] 
Nov 28 05:03:16.512 INFO [stderr] warning: function is never used: `get_placements_from_basis`
Nov 28 05:03:16.512 INFO [stderr]    --> src/main.rs:97:1
Nov 28 05:03:16.512 INFO [stderr]     |
Nov 28 05:03:16.513 INFO [stderr] 97  | / fn get_placements_from_basis(
Nov 28 05:03:16.513 INFO [stderr] 98  | |     rows: i32,
Nov 28 05:03:16.513 INFO [stderr] 99  | |     cols: i32,
Nov 28 05:03:16.514 INFO [stderr] 100 | |     basis_placements: Vec<(HashSet<(i32, i32)>, i32)>,
Nov 28 05:03:16.514 INFO [stderr] ...   |
Nov 28 05:03:16.514 INFO [stderr] 119 | |     placements
Nov 28 05:03:16.514 INFO [stderr] 120 | | }
Nov 28 05:03:16.515 INFO [stderr]     | |_^
Nov 28 05:03:16.515 INFO [stderr] 
Nov 28 05:03:16.515 INFO [stderr] warning: function is never used: `print_placement`
Nov 28 05:03:16.516 INFO [stderr]    --> src/main.rs:135:1
Nov 28 05:03:16.516 INFO [stderr]     |
Nov 28 05:03:16.516 INFO [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) {
Nov 28 05:03:16.516 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.517 INFO [stderr] 
Nov 28 05:03:16.517 INFO [stderr] warning: function is never used: `solve_brute_force`
Nov 28 05:03:16.517 INFO [stderr]    --> src/main.rs:150:1
Nov 28 05:03:16.518 INFO [stderr]     |
Nov 28 05:03:16.518 INFO [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec<Vec<(i32, i32)>> {
Nov 28 05:03:16.518 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.519 INFO [stderr] 
Nov 28 05:03:16.519 INFO [stderr] warning: function is never used: `is_valid_placement`
Nov 28 05:03:16.519 INFO [stderr]    --> src/main.rs:160:1
Nov 28 05:03:16.519 INFO [stderr]     |
Nov 28 05:03:16.520 INFO [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Nov 28 05:03:16.520 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.520 INFO [stderr] 
Nov 28 05:03:16.521 INFO [stderr] warning: function is never used: `is_valid_path`
Nov 28 05:03:16.521 INFO [stderr]    --> src/main.rs:331:1
Nov 28 05:03:16.521 INFO [stderr]     |
Nov 28 05:03:16.522 INFO [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Nov 28 05:03:16.522 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.522 INFO [stderr] 
Nov 28 05:03:16.522 INFO [stderr] warning: function is never used: `enumerate_placements`
Nov 28 05:03:16.523 INFO [stderr]    --> src/main.rs:342:1
Nov 28 05:03:16.523 INFO [stderr]     |
Nov 28 05:03:16.523 INFO [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec<Vec<(i32, i32)>> {
Nov 28 05:03:16.524 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.524 INFO [stderr] 
Nov 28 05:03:16.528 INFO [stderr] warning: function is never used: `num_to_coord`
Nov 28 05:03:16.529 INFO [stderr]    --> src/main.rs:359:1
Nov 28 05:03:16.529 INFO [stderr]     |
Nov 28 05:03:16.529 INFO [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) {
Nov 28 05:03:16.530 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.530 INFO [stderr] 
Nov 28 05:03:16.530 INFO [stderr] warning: function is never used: `get_choose_set`
Nov 28 05:03:16.530 INFO [stderr]    --> src/main.rs:363:1
Nov 28 05:03:16.531 INFO [stderr]     |
Nov 28 05:03:16.531 INFO [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec<Vec<i32>> {
Nov 28 05:03:16.531 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.532 INFO [stderr] 
Nov 28 05:03:16.597 INFO [stderr] warning: unused variable: `test_case_num`
Nov 28 05:03:16.597 INFO [stderr]   --> src/main.rs:10:9
Nov 28 05:03:16.597 INFO [stderr]    |
Nov 28 05:03:16.597 INFO [stderr] 10 |     for test_case_num in 0..num_test_cases {
Nov 28 05:03:16.598 INFO [stderr]    |         ^^^^^^^^^^^^^ help: consider using `_test_case_num` instead
Nov 28 05:03:16.598 INFO [stderr]    |
Nov 28 05:03:16.598 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 28 05:03:16.599 INFO [stderr] 
Nov 28 05:03:16.599 INFO [stderr] warning: unused variable: `all_placements`
Nov 28 05:03:16.599 INFO [stderr]   --> src/main.rs:47:13
Nov 28 05:03:16.600 INFO [stderr]    |
Nov 28 05:03:16.600 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Nov 28 05:03:16.600 INFO [stderr]    |             ^^^^^^^^^^^^^^ help: consider using `_all_placements` instead
Nov 28 05:03:16.600 INFO [stderr] 
Nov 28 05:03:16.601 INFO [stderr] warning: unused variable: `rows`
Nov 28 05:03:16.601 INFO [stderr]   --> src/main.rs:87:19
Nov 28 05:03:16.601 INFO [stderr]    |
Nov 28 05:03:16.601 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Nov 28 05:03:16.602 INFO [stderr]    |                   ^^^^ help: consider using `_rows` instead
Nov 28 05:03:16.602 INFO [stderr] 
Nov 28 05:03:16.614 INFO [stderr] warning: variable does not need to be mutable
Nov 28 05:03:16.614 INFO [stderr]   --> src/main.rs:47:9
Nov 28 05:03:16.614 INFO [stderr]    |
Nov 28 05:03:16.614 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Nov 28 05:03:16.614 INFO [stderr]    |         ----^^^^^^^^^^^^^^
Nov 28 05:03:16.614 INFO [stderr]    |         |
Nov 28 05:03:16.614 INFO [stderr]    |         help: remove this `mut`
Nov 28 05:03:16.614 INFO [stderr]    |
Nov 28 05:03:16.614 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 05:03:16.614 INFO [stderr] 
Nov 28 05:03:16.644 INFO [stderr] warning: function is never used: `solve`
Nov 28 05:03:16.644 INFO [stderr]   --> src/main.rs:46:1
Nov 28 05:03:16.644 INFO [stderr]    |
Nov 28 05:03:16.644 INFO [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize {
Nov 28 05:03:16.644 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.644 INFO [stderr]    |
Nov 28 05:03:16.644 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 28 05:03:16.645 INFO [stderr] 
Nov 28 05:03:16.645 INFO [stderr] warning: function is never used: `print_in_order`
Nov 28 05:03:16.645 INFO [stderr]   --> src/main.rs:87:1
Nov 28 05:03:16.645 INFO [stderr]    |
Nov 28 05:03:16.645 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Nov 28 05:03:16.645 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.645 INFO [stderr] 
Nov 28 05:03:16.645 INFO [stderr] warning: function is never used: `get_placements_from_basis`
Nov 28 05:03:16.645 INFO [stderr]    --> src/main.rs:97:1
Nov 28 05:03:16.645 INFO [stderr]     |
Nov 28 05:03:16.645 INFO [stderr] 97  | / fn get_placements_from_basis(
Nov 28 05:03:16.645 INFO [stderr] 98  | |     rows: i32,
Nov 28 05:03:16.645 INFO [stderr] 99  | |     cols: i32,
Nov 28 05:03:16.645 INFO [stderr] 100 | |     basis_placements: Vec<(HashSet<(i32, i32)>, i32)>,
Nov 28 05:03:16.645 INFO [stderr] ...   |
Nov 28 05:03:16.645 INFO [stderr] 119 | |     placements
Nov 28 05:03:16.645 INFO [stderr] 120 | | }
Nov 28 05:03:16.645 INFO [stderr]     | |_^
Nov 28 05:03:16.645 INFO [stderr] 
Nov 28 05:03:16.645 INFO [stderr] warning: function is never used: `print_placement`
Nov 28 05:03:16.645 INFO [stderr]    --> src/main.rs:135:1
Nov 28 05:03:16.645 INFO [stderr]     |
Nov 28 05:03:16.645 INFO [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) {
Nov 28 05:03:16.645 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.645 INFO [stderr] 
Nov 28 05:03:16.648 INFO [stderr] warning: function is never used: `solve_brute_force`
Nov 28 05:03:16.648 INFO [stderr]    --> src/main.rs:150:1
Nov 28 05:03:16.648 INFO [stderr]     |
Nov 28 05:03:16.648 INFO [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec<Vec<(i32, i32)>> {
Nov 28 05:03:16.648 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.648 INFO [stderr] 
Nov 28 05:03:16.648 INFO [stderr] warning: function is never used: `is_valid_placement`
Nov 28 05:03:16.648 INFO [stderr]    --> src/main.rs:160:1
Nov 28 05:03:16.648 INFO [stderr]     |
Nov 28 05:03:16.648 INFO [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Nov 28 05:03:16.648 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.648 INFO [stderr] 
Nov 28 05:03:16.648 INFO [stderr] warning: function is never used: `is_valid_path`
Nov 28 05:03:16.648 INFO [stderr]    --> src/main.rs:331:1
Nov 28 05:03:16.648 INFO [stderr]     |
Nov 28 05:03:16.648 INFO [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Nov 28 05:03:16.649 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.649 INFO [stderr] 
Nov 28 05:03:16.649 INFO [stderr] warning: function is never used: `enumerate_placements`
Nov 28 05:03:16.649 INFO [stderr]    --> src/main.rs:342:1
Nov 28 05:03:16.649 INFO [stderr]     |
Nov 28 05:03:16.649 INFO [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec<Vec<(i32, i32)>> {
Nov 28 05:03:16.649 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.649 INFO [stderr] 
Nov 28 05:03:16.649 INFO [stderr] warning: function is never used: `num_to_coord`
Nov 28 05:03:16.649 INFO [stderr]    --> src/main.rs:359:1
Nov 28 05:03:16.649 INFO [stderr]     |
Nov 28 05:03:16.649 INFO [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) {
Nov 28 05:03:16.649 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.649 INFO [stderr] 
Nov 28 05:03:16.649 INFO [stderr] warning: function is never used: `get_choose_set`
Nov 28 05:03:16.649 INFO [stderr]    --> src/main.rs:363:1
Nov 28 05:03:16.649 INFO [stderr]     |
Nov 28 05:03:16.649 INFO [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec<Vec<i32>> {
Nov 28 05:03:16.649 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 05:03:16.649 INFO [stderr] 
Nov 28 05:03:16.688 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
Nov 28 05:03:16.694 INFO [stderr] su: No module specific data is present
Nov 28 05:03:17.202 INFO running `"docker" "inspect" "f61227b2cae0475ec2041dbf1d13d5eacab693e306a104c337cca4d628e9e0bf"`
Nov 28 05:03:17.427 INFO running `"docker" "rm" "-f" "f61227b2cae0475ec2041dbf1d13d5eacab693e306a104c337cca4d628e9e0bf"`
Nov 28 05:03:17.605 INFO [stdout] f61227b2cae0475ec2041dbf1d13d5eacab693e306a104c337cca4d628e9e0bf