Dec 04 18:20:24.014 INFO checking garyemerson/queens_on_board against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 18:20:24.014 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-3/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 18:20:24.471 INFO [stdout] 7cc300eedc3639e05e7976334c83c3c27ae7bd01d7018d6bec0cda3ba9d0afc2
Dec 04 18:20:24.473 INFO running `"docker" "start" "-a" "7cc300eedc3639e05e7976334c83c3c27ae7bd01d7018d6bec0cda3ba9d0afc2"`
Dec 04 18:20:26.140 INFO [stderr] usermod: no changes
Dec 04 18:20:26.195 INFO [stderr]     Checking queens_on_board v0.1.0 (/source)
Dec 04 18:20:26.730 INFO [stderr] warning: unused variable: `test_case_num`
Dec 04 18:20:26.730 INFO [stderr]   --> src/main.rs:10:9
Dec 04 18:20:26.731 INFO [stderr]    |
Dec 04 18:20:26.731 INFO [stderr] 10 |     for test_case_num in 0..num_test_cases {
Dec 04 18:20:26.731 INFO [stderr]    |         ^^^^^^^^^^^^^ help: consider using `_test_case_num` instead
Dec 04 18:20:26.731 INFO [stderr]    |
Dec 04 18:20:26.731 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 18:20:26.731 INFO [stderr] 
Dec 04 18:20:26.731 INFO [stderr] warning: unused variable: `all_placements`
Dec 04 18:20:26.731 INFO [stderr]   --> src/main.rs:47:13
Dec 04 18:20:26.731 INFO [stderr]    |
Dec 04 18:20:26.731 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 04 18:20:26.731 INFO [stderr]    |             ^^^^^^^^^^^^^^ help: consider using `_all_placements` instead
Dec 04 18:20:26.731 INFO [stderr] 
Dec 04 18:20:26.731 INFO [stderr] warning: unused variable: `rows`
Dec 04 18:20:26.731 INFO [stderr]   --> src/main.rs:87:19
Dec 04 18:20:26.731 INFO [stderr]    |
Dec 04 18:20:26.731 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 04 18:20:26.731 INFO [stderr]    |                   ^^^^ help: consider using `_rows` instead
Dec 04 18:20:26.731 INFO [stderr] 
Dec 04 18:20:26.743 INFO [stderr] warning: variable does not need to be mutable
Dec 04 18:20:26.743 INFO [stderr]   --> src/main.rs:47:9
Dec 04 18:20:26.743 INFO [stderr]    |
Dec 04 18:20:26.743 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 04 18:20:26.743 INFO [stderr]    |         ----^^^^^^^^^^^^^^
Dec 04 18:20:26.743 INFO [stderr]    |         |
Dec 04 18:20:26.743 INFO [stderr]    |         help: remove this `mut`
Dec 04 18:20:26.743 INFO [stderr]    |
Dec 04 18:20:26.743 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 18:20:26.743 INFO [stderr] 
Dec 04 18:20:26.755 INFO [stderr] warning: unused variable: `test_case_num`
Dec 04 18:20:26.755 INFO [stderr]   --> src/main.rs:10:9
Dec 04 18:20:26.755 INFO [stderr]    |
Dec 04 18:20:26.755 INFO [stderr] 10 |     for test_case_num in 0..num_test_cases {
Dec 04 18:20:26.755 INFO [stderr]    |         ^^^^^^^^^^^^^ help: consider using `_test_case_num` instead
Dec 04 18:20:26.755 INFO [stderr]    |
Dec 04 18:20:26.755 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 18:20:26.755 INFO [stderr] 
Dec 04 18:20:26.755 INFO [stderr] warning: unused variable: `all_placements`
Dec 04 18:20:26.755 INFO [stderr]   --> src/main.rs:47:13
Dec 04 18:20:26.755 INFO [stderr]    |
Dec 04 18:20:26.755 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 04 18:20:26.755 INFO [stderr]    |             ^^^^^^^^^^^^^^ help: consider using `_all_placements` instead
Dec 04 18:20:26.755 INFO [stderr] 
Dec 04 18:20:26.755 INFO [stderr] warning: unused variable: `rows`
Dec 04 18:20:26.755 INFO [stderr]   --> src/main.rs:87:19
Dec 04 18:20:26.755 INFO [stderr]    |
Dec 04 18:20:26.755 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 04 18:20:26.755 INFO [stderr]    |                   ^^^^ help: consider using `_rows` instead
Dec 04 18:20:26.755 INFO [stderr] 
Dec 04 18:20:26.763 INFO [stderr] warning: variable does not need to be mutable
Dec 04 18:20:26.763 INFO [stderr]   --> src/main.rs:47:9
Dec 04 18:20:26.763 INFO [stderr]    |
Dec 04 18:20:26.763 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 04 18:20:26.763 INFO [stderr]    |         ----^^^^^^^^^^^^^^
Dec 04 18:20:26.763 INFO [stderr]    |         |
Dec 04 18:20:26.763 INFO [stderr]    |         help: remove this `mut`
Dec 04 18:20:26.763 INFO [stderr]    |
Dec 04 18:20:26.763 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 18:20:26.763 INFO [stderr] 
Dec 04 18:20:26.827 INFO [stderr] warning: function is never used: `solve`
Dec 04 18:20:26.827 INFO [stderr]   --> src/main.rs:46:1
Dec 04 18:20:26.827 INFO [stderr]    |
Dec 04 18:20:26.827 INFO [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize {
Dec 04 18:20:26.827 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.828 INFO [stderr]    |
Dec 04 18:20:26.828 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 18:20:26.828 INFO [stderr] 
Dec 04 18:20:26.828 INFO [stderr] warning: function is never used: `print_in_order`
Dec 04 18:20:26.828 INFO [stderr]   --> src/main.rs:87:1
Dec 04 18:20:26.828 INFO [stderr]    |
Dec 04 18:20:26.828 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 04 18:20:26.828 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.828 INFO [stderr] 
Dec 04 18:20:26.828 INFO [stderr] warning: function is never used: `get_placements_from_basis`
Dec 04 18:20:26.828 INFO [stderr]    --> src/main.rs:97:1
Dec 04 18:20:26.828 INFO [stderr]     |
Dec 04 18:20:26.828 INFO [stderr] 97  | / fn get_placements_from_basis(
Dec 04 18:20:26.828 INFO [stderr] 98  | |     rows: i32,
Dec 04 18:20:26.828 INFO [stderr] 99  | |     cols: i32,
Dec 04 18:20:26.828 INFO [stderr] 100 | |     basis_placements: Vec<(HashSet<(i32, i32)>, i32)>,
Dec 04 18:20:26.828 INFO [stderr] ...   |
Dec 04 18:20:26.828 INFO [stderr] 119 | |     placements
Dec 04 18:20:26.828 INFO [stderr] 120 | | }
Dec 04 18:20:26.828 INFO [stderr]     | |_^
Dec 04 18:20:26.828 INFO [stderr] 
Dec 04 18:20:26.828 INFO [stderr] warning: function is never used: `print_placement`
Dec 04 18:20:26.828 INFO [stderr]    --> src/main.rs:135:1
Dec 04 18:20:26.828 INFO [stderr]     |
Dec 04 18:20:26.828 INFO [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) {
Dec 04 18:20:26.828 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.828 INFO [stderr] 
Dec 04 18:20:26.828 INFO [stderr] warning: function is never used: `solve_brute_force`
Dec 04 18:20:26.828 INFO [stderr]    --> src/main.rs:150:1
Dec 04 18:20:26.828 INFO [stderr]     |
Dec 04 18:20:26.828 INFO [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec<Vec<(i32, i32)>> {
Dec 04 18:20:26.828 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.828 INFO [stderr] 
Dec 04 18:20:26.828 INFO [stderr] warning: function is never used: `is_valid_placement`
Dec 04 18:20:26.828 INFO [stderr]    --> src/main.rs:160:1
Dec 04 18:20:26.828 INFO [stderr]     |
Dec 04 18:20:26.828 INFO [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 04 18:20:26.828 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.831 INFO [stderr] 
Dec 04 18:20:26.831 INFO [stderr] warning: function is never used: `is_valid_path`
Dec 04 18:20:26.831 INFO [stderr]    --> src/main.rs:331:1
Dec 04 18:20:26.831 INFO [stderr]     |
Dec 04 18:20:26.831 INFO [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 04 18:20:26.831 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.831 INFO [stderr] 
Dec 04 18:20:26.831 INFO [stderr] warning: function is never used: `enumerate_placements`
Dec 04 18:20:26.831 INFO [stderr]    --> src/main.rs:342:1
Dec 04 18:20:26.831 INFO [stderr]     |
Dec 04 18:20:26.831 INFO [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec<Vec<(i32, i32)>> {
Dec 04 18:20:26.831 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.831 INFO [stderr] 
Dec 04 18:20:26.831 INFO [stderr] warning: function is never used: `num_to_coord`
Dec 04 18:20:26.831 INFO [stderr]    --> src/main.rs:359:1
Dec 04 18:20:26.831 INFO [stderr]     |
Dec 04 18:20:26.831 INFO [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) {
Dec 04 18:20:26.831 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.831 INFO [stderr] 
Dec 04 18:20:26.831 INFO [stderr] warning: function is never used: `get_choose_set`
Dec 04 18:20:26.831 INFO [stderr]    --> src/main.rs:363:1
Dec 04 18:20:26.831 INFO [stderr]     |
Dec 04 18:20:26.831 INFO [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec<Vec<i32>> {
Dec 04 18:20:26.831 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.831 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `solve`
Dec 04 18:20:26.855 INFO [stderr]   --> src/main.rs:46:1
Dec 04 18:20:26.855 INFO [stderr]    |
Dec 04 18:20:26.855 INFO [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize {
Dec 04 18:20:26.855 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.855 INFO [stderr]    |
Dec 04 18:20:26.855 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `print_in_order`
Dec 04 18:20:26.855 INFO [stderr]   --> src/main.rs:87:1
Dec 04 18:20:26.855 INFO [stderr]    |
Dec 04 18:20:26.855 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 04 18:20:26.855 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `get_placements_from_basis`
Dec 04 18:20:26.855 INFO [stderr]    --> src/main.rs:97:1
Dec 04 18:20:26.855 INFO [stderr]     |
Dec 04 18:20:26.855 INFO [stderr] 97  | / fn get_placements_from_basis(
Dec 04 18:20:26.855 INFO [stderr] 98  | |     rows: i32,
Dec 04 18:20:26.855 INFO [stderr] 99  | |     cols: i32,
Dec 04 18:20:26.855 INFO [stderr] 100 | |     basis_placements: Vec<(HashSet<(i32, i32)>, i32)>,
Dec 04 18:20:26.855 INFO [stderr] ...   |
Dec 04 18:20:26.855 INFO [stderr] 119 | |     placements
Dec 04 18:20:26.855 INFO [stderr] 120 | | }
Dec 04 18:20:26.855 INFO [stderr]     | |_^
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `print_placement`
Dec 04 18:20:26.855 INFO [stderr]    --> src/main.rs:135:1
Dec 04 18:20:26.855 INFO [stderr]     |
Dec 04 18:20:26.855 INFO [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) {
Dec 04 18:20:26.855 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `solve_brute_force`
Dec 04 18:20:26.855 INFO [stderr]    --> src/main.rs:150:1
Dec 04 18:20:26.855 INFO [stderr]     |
Dec 04 18:20:26.855 INFO [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec<Vec<(i32, i32)>> {
Dec 04 18:20:26.855 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `is_valid_placement`
Dec 04 18:20:26.855 INFO [stderr]    --> src/main.rs:160:1
Dec 04 18:20:26.855 INFO [stderr]     |
Dec 04 18:20:26.855 INFO [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 04 18:20:26.855 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `is_valid_path`
Dec 04 18:20:26.855 INFO [stderr]    --> src/main.rs:331:1
Dec 04 18:20:26.855 INFO [stderr]     |
Dec 04 18:20:26.855 INFO [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 04 18:20:26.855 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.855 INFO [stderr] 
Dec 04 18:20:26.855 INFO [stderr] warning: function is never used: `enumerate_placements`
Dec 04 18:20:26.855 INFO [stderr]    --> src/main.rs:342:1
Dec 04 18:20:26.856 INFO [stderr]     |
Dec 04 18:20:26.856 INFO [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec<Vec<(i32, i32)>> {
Dec 04 18:20:26.856 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.856 INFO [stderr] 
Dec 04 18:20:26.856 INFO [stderr] warning: function is never used: `num_to_coord`
Dec 04 18:20:26.856 INFO [stderr]    --> src/main.rs:359:1
Dec 04 18:20:26.856 INFO [stderr]     |
Dec 04 18:20:26.856 INFO [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) {
Dec 04 18:20:26.856 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.856 INFO [stderr] 
Dec 04 18:20:26.856 INFO [stderr] warning: function is never used: `get_choose_set`
Dec 04 18:20:26.856 INFO [stderr]    --> src/main.rs:363:1
Dec 04 18:20:26.856 INFO [stderr]     |
Dec 04 18:20:26.856 INFO [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec<Vec<i32>> {
Dec 04 18:20:26.856 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 18:20:26.856 INFO [stderr] 
Dec 04 18:20:26.922 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Dec 04 18:20:26.925 INFO [stderr] su: No module specific data is present
Dec 04 18:20:27.909 INFO running `"docker" "inspect" "7cc300eedc3639e05e7976334c83c3c27ae7bd01d7018d6bec0cda3ba9d0afc2"`
Dec 04 18:20:28.235 INFO running `"docker" "rm" "-f" "7cc300eedc3639e05e7976334c83c3c27ae7bd01d7018d6bec0cda3ba9d0afc2"`
Dec 04 18:20:28.557 INFO [stdout] 7cc300eedc3639e05e7976334c83c3c27ae7bd01d7018d6bec0cda3ba9d0afc2