[INFO] updating cached repository https://github.com/garyemerson/queens_on_board [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 23f06b5f4a0fd3181a3420ef359fc37791eb8312 [INFO] checking garyemerson/queens_on_board against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgaryemerson%2Fqueens_on_board" "/workspace/builds/worker-10/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/garyemerson/queens_on_board on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b [INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/garyemerson/queens_on_board [INFO] finished tweaking git repo https://github.com/garyemerson/queens_on_board [INFO] tweaked toml for git repo https://github.com/garyemerson/queens_on_board written to /workspace/builds/worker-10/source/Cargo.toml [INFO] crate git repo https://github.com/garyemerson/queens_on_board already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 6ab35e902d18fdfce9445606f4effe5443a70630db7df25ba394d9f2be734144 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "6ab35e902d18fdfce9445606f4effe5443a70630db7df25ba394d9f2be734144"` [INFO] [stderr] Checking queens_on_board v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `test_case_num` [INFO] [stderr] --> src/main.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | for test_case_num in 0..num_test_cases { [INFO] [stderr] | ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_test_case_num` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `all_placements` [INFO] [stderr] --> src/main.rs:47:13 [INFO] [stderr] | [INFO] [stderr] 47 | let mut all_placements: Vec>> = Vec::new(); [INFO] [stderr] | ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_all_placements` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `rows` [INFO] [stderr] --> src/main.rs:87:19 [INFO] [stderr] | [INFO] [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) { [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_rows` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:47:9 [INFO] [stderr] | [INFO] [stderr] 47 | let mut all_placements: Vec>> = Vec::new(); [INFO] [stderr] | ----^^^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_case_num` [INFO] [stderr] --> src/main.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | for test_case_num in 0..num_test_cases { [INFO] [stderr] | ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_test_case_num` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `all_placements` [INFO] [stderr] --> src/main.rs:47:13 [INFO] [stderr] | [INFO] [stderr] 47 | let mut all_placements: Vec>> = Vec::new(); [INFO] [stderr] | ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_all_placements` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `rows` [INFO] [stderr] --> src/main.rs:87:19 [INFO] [stderr] | [INFO] [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) { [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_rows` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:47:9 [INFO] [stderr] | [INFO] [stderr] 47 | let mut all_placements: Vec>> = Vec::new(); [INFO] [stderr] | ----^^^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `solve` [INFO] [stderr] --> src/main.rs:46:1 [INFO] [stderr] | [INFO] [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `print_in_order` [INFO] [stderr] --> src/main.rs:87:1 [INFO] [stderr] | [INFO] [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `get_placements_from_basis` [INFO] [stderr] --> src/main.rs:97:1 [INFO] [stderr] | [INFO] [stderr] 97 | / fn get_placements_from_basis( [INFO] [stderr] 98 | | rows: i32, [INFO] [stderr] 99 | | cols: i32, [INFO] [stderr] 100 | | basis_placements: Vec<(HashSet<(i32, i32)>, i32)>, [INFO] [stderr] ... | [INFO] [stderr] 119 | | placements [INFO] [stderr] 120 | | } [INFO] [stderr] | |_^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `print_placement` [INFO] [stderr] --> src/main.rs:135:1 [INFO] [stderr] | [INFO] [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `solve_brute_force` [INFO] [stderr] --> src/main.rs:150:1 [INFO] [stderr] | [INFO] [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `is_valid_placement` [INFO] [stderr] --> src/main.rs:160:1 [INFO] [stderr] | [INFO] [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `is_valid_path` [INFO] [stderr] --> src/main.rs:331:1 [INFO] [stderr] | [INFO] [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `enumerate_placements` [INFO] [stderr] --> src/main.rs:342:1 [INFO] [stderr] | [INFO] [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `num_to_coord` [INFO] [stderr] --> src/main.rs:359:1 [INFO] [stderr] | [INFO] [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `get_choose_set` [INFO] [stderr] --> src/main.rs:363:1 [INFO] [stderr] | [INFO] [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `solve` [INFO] [stderr] --> src/main.rs:46:1 [INFO] [stderr] | [INFO] [stderr] 46 | fn solve(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> usize { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `print_in_order` [INFO] [stderr] --> src/main.rs:87:1 [INFO] [stderr] | [INFO] [stderr] 87 | fn print_in_order(rows: i32, cols: i32, placement: &HashSet<(i32, i32)>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `get_placements_from_basis` [INFO] [stderr] --> src/main.rs:97:1 [INFO] [stderr] | [INFO] [stderr] 97 | / fn get_placements_from_basis( [INFO] [stderr] 98 | | rows: i32, [INFO] [stderr] 99 | | cols: i32, [INFO] [stderr] 100 | | basis_placements: Vec<(HashSet<(i32, i32)>, i32)>, [INFO] [stderr] ... | [INFO] [stderr] 119 | | placements [INFO] [stderr] 120 | | } [INFO] [stderr] | |_^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `print_placement` [INFO] [stderr] --> src/main.rs:135:1 [INFO] [stderr] | [INFO] [stderr] 135 | fn print_placement(rows: i32, cols: i32, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `solve_brute_force` [INFO] [stderr] --> src/main.rs:150:1 [INFO] [stderr] | [INFO] [stderr] 150 | fn solve_brute_force(rows: i32, cols: i32, blocked_positions: &HashSet<(i32, i32)>) -> Vec> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `is_valid_placement` [INFO] [stderr] --> src/main.rs:160:1 [INFO] [stderr] | [INFO] [stderr] 160 | fn is_valid_placement(rows: i32, cols: i32, positions: &Vec<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `is_valid_path` [INFO] [stderr] --> src/main.rs:331:1 [INFO] [stderr] | [INFO] [stderr] 331 | fn is_valid_path(path: Vec<(i32, i32)>, occupied_positions: &HashSet<(i32, i32)>, blocked_positions: &HashSet<(i32, i32)>) -> bool { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `enumerate_placements` [INFO] [stderr] --> src/main.rs:342:1 [INFO] [stderr] | [INFO] [stderr] 342 | fn enumerate_placements(rows: i32, cols: i32, max_queens: i32) -> Vec> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `num_to_coord` [INFO] [stderr] --> src/main.rs:359:1 [INFO] [stderr] | [INFO] [stderr] 359 | fn num_to_coord(cols: i32, num: i32) -> (i32, i32) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `get_choose_set` [INFO] [stderr] --> src/main.rs:363:1 [INFO] [stderr] | [INFO] [stderr] 363 | fn get_choose_set(start: i32, end: i32, num: i32) -> Vec> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.61s [INFO] running `"docker" "inspect" "6ab35e902d18fdfce9445606f4effe5443a70630db7df25ba394d9f2be734144"` [INFO] running `"docker" "rm" "-f" "6ab35e902d18fdfce9445606f4effe5443a70630db7df25ba394d9f2be734144"` [INFO] [stdout] 6ab35e902d18fdfce9445606f4effe5443a70630db7df25ba394d9f2be734144