Dec 19 16:41:08.501 INFO checking garyemerson/queens_on_board against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 16:41:08.501 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/garyemerson/queens_on_board:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:41:08.980 INFO [stdout] 0cfabe67a5f167bf9146f050a1bb6256c51beef10344b8c21cb37f4a7ab1811b
Dec 19 16:41:08.988 INFO running `"docker" "start" "-a" "0cfabe67a5f167bf9146f050a1bb6256c51beef10344b8c21cb37f4a7ab1811b"`
Dec 19 16:41:11.349 INFO [stderr]     Checking queens_on_board v0.1.0 (/opt/crater/workdir)
Dec 19 16:41:11.808 INFO [stderr] warning: unused variable: `test_case_num`
Dec 19 16:41:11.808 INFO [stderr]   --> src/main.rs:10:9
Dec 19 16:41:11.808 INFO [stderr]    |
Dec 19 16:41:11.808 INFO [stderr] 10 |     for test_case_num in 0..num_test_cases {
Dec 19 16:41:11.808 INFO [stderr]    |         ^^^^^^^^^^^^^ help: consider using `_test_case_num` instead
Dec 19 16:41:11.808 INFO [stderr]    |
Dec 19 16:41:11.808 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:41:11.808 INFO [stderr] 
Dec 19 16:41:11.808 INFO [stderr] warning: unused variable: `all_placements`
Dec 19 16:41:11.808 INFO [stderr]   --> src/main.rs:47:13
Dec 19 16:41:11.808 INFO [stderr]    |
Dec 19 16:41:11.808 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 19 16:41:11.808 INFO [stderr]    |             ^^^^^^^^^^^^^^ help: consider using `_all_placements` instead
Dec 19 16:41:11.808 INFO [stderr] 
Dec 19 16:41:11.808 INFO [stderr] warning: unused variable: `rows`
Dec 19 16:41:11.808 INFO [stderr]   --> src/main.rs:87:19
Dec 19 16:41:11.808 INFO [stderr]    |
Dec 19 16:41:11.808 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 19 16:41:11.808 INFO [stderr]    |                   ^^^^ help: consider using `_rows` instead
Dec 19 16:41:11.808 INFO [stderr] 
Dec 19 16:41:11.824 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:41:11.824 INFO [stderr]   --> src/main.rs:47:9
Dec 19 16:41:11.824 INFO [stderr]    |
Dec 19 16:41:11.824 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 19 16:41:11.824 INFO [stderr]    |         ----^^^^^^^^^^^^^^
Dec 19 16:41:11.824 INFO [stderr]    |         |
Dec 19 16:41:11.824 INFO [stderr]    |         help: remove this `mut`
Dec 19 16:41:11.824 INFO [stderr]    |
Dec 19 16:41:11.824 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 16:41:11.824 INFO [stderr] 
Dec 19 16:41:11.888 INFO [stderr] warning: function is never used: `solve`
Dec 19 16:41:11.888 INFO [stderr]   --> src/main.rs:46:1
Dec 19 16:41:11.888 INFO [stderr]    |
Dec 19 16:41:11.888 INFO [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize {
Dec 19 16:41:11.889 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr]    |
Dec 19 16:41:11.889 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `print_in_order`
Dec 19 16:41:11.889 INFO [stderr]   --> src/main.rs:87:1
Dec 19 16:41:11.889 INFO [stderr]    |
Dec 19 16:41:11.889 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 19 16:41:11.889 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `get_placements_from_basis`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:97:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 97  | / fn get_placements_from_basis(
Dec 19 16:41:11.889 INFO [stderr] 98  | |     rows: i32,
Dec 19 16:41:11.889 INFO [stderr] 99  | |     cols: i32,
Dec 19 16:41:11.889 INFO [stderr] 100 | |     basis_placements: Vec<(HashSet<(i32, i32)>, i32)>,
Dec 19 16:41:11.889 INFO [stderr] ...   |
Dec 19 16:41:11.889 INFO [stderr] 119 | |     placements
Dec 19 16:41:11.889 INFO [stderr] 120 | | }
Dec 19 16:41:11.889 INFO [stderr]     | |_^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `print_placement`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:135:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `solve_brute_force`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:150:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec<Vec<(i32, i32)>> {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `is_valid_placement`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:160:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `is_valid_path`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:331:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `enumerate_placements`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:342:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec<Vec<(i32, i32)>> {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `num_to_coord`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:359:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.889 INFO [stderr] warning: function is never used: `get_choose_set`
Dec 19 16:41:11.889 INFO [stderr]    --> src/main.rs:363:1
Dec 19 16:41:11.889 INFO [stderr]     |
Dec 19 16:41:11.889 INFO [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec<Vec<i32>> {
Dec 19 16:41:11.889 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:11.889 INFO [stderr] 
Dec 19 16:41:11.997 INFO [stderr] warning: unused variable: `test_case_num`
Dec 19 16:41:11.997 INFO [stderr]   --> src/main.rs:10:9
Dec 19 16:41:11.997 INFO [stderr]    |
Dec 19 16:41:11.997 INFO [stderr] 10 |     for test_case_num in 0..num_test_cases {
Dec 19 16:41:11.997 INFO [stderr]    |         ^^^^^^^^^^^^^ help: consider using `_test_case_num` instead
Dec 19 16:41:11.997 INFO [stderr]    |
Dec 19 16:41:11.997 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:41:11.997 INFO [stderr] 
Dec 19 16:41:11.997 INFO [stderr] warning: unused variable: `all_placements`
Dec 19 16:41:11.997 INFO [stderr]   --> src/main.rs:47:13
Dec 19 16:41:11.997 INFO [stderr]    |
Dec 19 16:41:11.997 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 19 16:41:11.997 INFO [stderr]    |             ^^^^^^^^^^^^^^ help: consider using `_all_placements` instead
Dec 19 16:41:11.998 INFO [stderr] 
Dec 19 16:41:11.998 INFO [stderr] warning: unused variable: `rows`
Dec 19 16:41:11.998 INFO [stderr]   --> src/main.rs:87:19
Dec 19 16:41:11.998 INFO [stderr]    |
Dec 19 16:41:11.998 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 19 16:41:11.998 INFO [stderr]    |                   ^^^^ help: consider using `_rows` instead
Dec 19 16:41:11.998 INFO [stderr] 
Dec 19 16:41:12.004 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:41:12.005 INFO [stderr]   --> src/main.rs:47:9
Dec 19 16:41:12.005 INFO [stderr]    |
Dec 19 16:41:12.005 INFO [stderr] 47 |     let mut all_placements: Vec<Vec<HashSet<(i32, i32)>>> = Vec::new();
Dec 19 16:41:12.005 INFO [stderr]    |         ----^^^^^^^^^^^^^^
Dec 19 16:41:12.005 INFO [stderr]    |         |
Dec 19 16:41:12.005 INFO [stderr]    |         help: remove this `mut`
Dec 19 16:41:12.005 INFO [stderr]    |
Dec 19 16:41:12.005 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 16:41:12.005 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `solve`
Dec 19 16:41:12.037 INFO [stderr]   --> src/main.rs:46:1
Dec 19 16:41:12.037 INFO [stderr]    |
Dec 19 16:41:12.037 INFO [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize {
Dec 19 16:41:12.037 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.037 INFO [stderr]    |
Dec 19 16:41:12.037 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `print_in_order`
Dec 19 16:41:12.037 INFO [stderr]   --> src/main.rs:87:1
Dec 19 16:41:12.037 INFO [stderr]    |
Dec 19 16:41:12.037 INFO [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) {
Dec 19 16:41:12.037 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `get_placements_from_basis`
Dec 19 16:41:12.037 INFO [stderr]    --> src/main.rs:97:1
Dec 19 16:41:12.037 INFO [stderr]     |
Dec 19 16:41:12.037 INFO [stderr] 97  | / fn get_placements_from_basis(
Dec 19 16:41:12.037 INFO [stderr] 98  | |     rows: i32,
Dec 19 16:41:12.037 INFO [stderr] 99  | |     cols: i32,
Dec 19 16:41:12.037 INFO [stderr] 100 | |     basis_placements: Vec<(HashSet<(i32, i32)>, i32)>,
Dec 19 16:41:12.037 INFO [stderr] ...   |
Dec 19 16:41:12.037 INFO [stderr] 119 | |     placements
Dec 19 16:41:12.037 INFO [stderr] 120 | | }
Dec 19 16:41:12.037 INFO [stderr]     | |_^
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `print_placement`
Dec 19 16:41:12.037 INFO [stderr]    --> src/main.rs:135:1
Dec 19 16:41:12.037 INFO [stderr]     |
Dec 19 16:41:12.037 INFO [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) {
Dec 19 16:41:12.037 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `solve_brute_force`
Dec 19 16:41:12.037 INFO [stderr]    --> src/main.rs:150:1
Dec 19 16:41:12.037 INFO [stderr]     |
Dec 19 16:41:12.037 INFO [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec<Vec<(i32, i32)>> {
Dec 19 16:41:12.037 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `is_valid_placement`
Dec 19 16:41:12.037 INFO [stderr]    --> src/main.rs:160:1
Dec 19 16:41:12.037 INFO [stderr]     |
Dec 19 16:41:12.037 INFO [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 19 16:41:12.037 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `is_valid_path`
Dec 19 16:41:12.037 INFO [stderr]    --> src/main.rs:331:1
Dec 19 16:41:12.037 INFO [stderr]     |
Dec 19 16:41:12.037 INFO [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool {
Dec 19 16:41:12.037 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.037 INFO [stderr] 
Dec 19 16:41:12.037 INFO [stderr] warning: function is never used: `enumerate_placements`
Dec 19 16:41:12.037 INFO [stderr]    --> src/main.rs:342:1
Dec 19 16:41:12.037 INFO [stderr]     |
Dec 19 16:41:12.037 INFO [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec<Vec<(i32, i32)>> {
Dec 19 16:41:12.038 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.038 INFO [stderr] 
Dec 19 16:41:12.038 INFO [stderr] warning: function is never used: `num_to_coord`
Dec 19 16:41:12.038 INFO [stderr]    --> src/main.rs:359:1
Dec 19 16:41:12.038 INFO [stderr]     |
Dec 19 16:41:12.038 INFO [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) {
Dec 19 16:41:12.038 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.038 INFO [stderr] 
Dec 19 16:41:12.038 INFO [stderr] warning: function is never used: `get_choose_set`
Dec 19 16:41:12.038 INFO [stderr]    --> src/main.rs:363:1
Dec 19 16:41:12.038 INFO [stderr]     |
Dec 19 16:41:12.038 INFO [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec<Vec<i32>> {
Dec 19 16:41:12.038 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:41:12.038 INFO [stderr] 
Dec 19 16:41:12.072 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
Dec 19 16:41:13.282 INFO running `"docker" "inspect" "0cfabe67a5f167bf9146f050a1bb6256c51beef10344b8c21cb37f4a7ab1811b"`
Dec 19 16:41:13.512 INFO running `"docker" "rm" "-f" "0cfabe67a5f167bf9146f050a1bb6256c51beef10344b8c21cb37f4a7ab1811b"`
Dec 19 16:41:13.860 INFO [stdout] 0cfabe67a5f167bf9146f050a1bb6256c51beef10344b8c21cb37f4a7ab1811b