[INFO] fetching crate rsleetcode 0.0.3...
[INFO] testing rsleetcode-0.0.3 against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] extracting crate rsleetcode 0.0.3 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate rsleetcode 0.0.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rsleetcode 0.0.3
[INFO] tweaked toml for crates.io crate rsleetcode 0.0.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rsleetcode 0.0.3 on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bb5a8a380c5080a1641e06d54b8b3b1c7459aa3b3e422d0e2a918c2f72dd517
[INFO] running `Command { std: "docker" "start" "-a" "1bb5a8a380c5080a1641e06d54b8b3b1c7459aa3b3e422d0e2a918c2f72dd517", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1bb5a8a380c5080a1641e06d54b8b3b1c7459aa3b3e422d0e2a918c2f72dd517", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bb5a8a380c5080a1641e06d54b8b3b1c7459aa3b3e422d0e2a918c2f72dd517", kill_on_drop: false }`
[INFO] [stdout] 1bb5a8a380c5080a1641e06d54b8b3b1c7459aa3b3e422d0e2a918c2f72dd517
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf74fed2cb891d2b65eb29db3dee433713c47e023a822057037667caaa89962e
[INFO] running `Command { std: "docker" "start" "-a" "bf74fed2cb891d2b65eb29db3dee433713c47e023a822057037667caaa89962e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rsleetcode v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `num_rows`
[INFO] [stdout]    --> src/easy.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 404 | pub fn pascals_triangle(num_rows: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]     |                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row_index`
[INFO] [stdout]    --> src/easy.rs:408:28
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn pascals_triangle_ii(row_index: i32) -> Vec<i32> {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_row_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prices`
[INFO] [stdout]    --> src/easy.rs:412:40
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub fn best_time_to_buy_and_sell_stock(prices: Vec<i32>) -> i32 {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_prices`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:416:25
[INFO] [stdout]     |
[INFO] [stdout] 416 | pub fn valid_palindrome(s: String) -> bool {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:420:22
[INFO] [stdout]     |
[INFO] [stdout] 420 | pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:426:39
[INFO] [stdout]     |
[INFO] [stdout] 426 | pub fn binary_tree_preorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:430:40
[INFO] [stdout]     |
[INFO] [stdout] 430 | pub fn binary_tree_postorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_number`
[INFO] [stdout]    --> src/easy.rs:440:33
[INFO] [stdout]     |
[INFO] [stdout] 440 | pub fn excel_sheet_column_title(column_number: i32) -> String {
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:444:25
[INFO] [stdout]     |
[INFO] [stdout] 444 | pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_title`
[INFO] [stdout]    --> src/easy.rs:450:34
[INFO] [stdout]     |
[INFO] [stdout] 450 | pub fn excel_sheet_column_number(column_title: String) -> i32 {
[INFO] [stdout]     |                                  ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_title`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/easy.rs:454:21
[INFO] [stdout]     |
[INFO] [stdout] 454 | pub fn reverse_bits(x: u32) -> u32 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:458:25
[INFO] [stdout]     |
[INFO] [stdout] 458 | pub fn number_of_1_bits(n: i32) -> i32 {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:462:21
[INFO] [stdout]     |
[INFO] [stdout] 462 | pub fn happy_number(n: i32) -> bool {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:466:36
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/easy.rs:466:65
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:470:27
[INFO] [stdout]     |
[INFO] [stdout] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/easy.rs:470:38
[INFO] [stdout]     |
[INFO] [stdout] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:474:28
[INFO] [stdout]     |
[INFO] [stdout] 474 | pub fn reverse_linked_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:478:27
[INFO] [stdout]     |
[INFO] [stdout] 478 | pub fn contains_duplicate(nums: Vec<i32>) -> bool {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:482:30
[INFO] [stdout]     |
[INFO] [stdout] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> src/easy.rs:482:46
[INFO] [stdout]     |
[INFO] [stdout] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stdout]     |                                              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:486:34
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn count_complete_tree_nodes(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:492:27
[INFO] [stdout]     |
[INFO] [stdout] 492 | pub fn invert_binary_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:496:23
[INFO] [stdout]     |
[INFO] [stdout] 496 | pub fn summary_ranges(nums: Vec<i32>) -> Vec<String> {
[INFO] [stdout]     |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:500:21
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn power_of_two(n: i32) -> bool {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:506:31
[INFO] [stdout]     |
[INFO] [stdout] 506 | pub fn palindrome_linked_list(head: Option<Box<ListNode>>) -> bool {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:510:22
[INFO] [stdout]     |
[INFO] [stdout] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stdout]     |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/easy.rs:510:33
[INFO] [stdout]     |
[INFO] [stdout] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "bf74fed2cb891d2b65eb29db3dee433713c47e023a822057037667caaa89962e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf74fed2cb891d2b65eb29db3dee433713c47e023a822057037667caaa89962e", kill_on_drop: false }`
[INFO] [stdout] bf74fed2cb891d2b65eb29db3dee433713c47e023a822057037667caaa89962e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85955e4141376af177b6f100ef01f3db05e52efcf753410baf934b1cbd04db2c
[INFO] running `Command { std: "docker" "start" "-a" "85955e4141376af177b6f100ef01f3db05e52efcf753410baf934b1cbd04db2c", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `num_rows`
[INFO] [stdout]    --> src/easy.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 404 | pub fn pascals_triangle(num_rows: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]     |                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row_index`
[INFO] [stdout]    --> src/easy.rs:408:28
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn pascals_triangle_ii(row_index: i32) -> Vec<i32> {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_row_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prices`
[INFO] [stdout]    --> src/easy.rs:412:40
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub fn best_time_to_buy_and_sell_stock(prices: Vec<i32>) -> i32 {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_prices`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:416:25
[INFO] [stdout]     |
[INFO] [stdout] 416 | pub fn valid_palindrome(s: String) -> bool {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:420:22
[INFO] [stdout]     |
[INFO] [stdout] 420 | pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:426:39
[INFO] [stdout]     |
[INFO] [stdout] 426 | pub fn binary_tree_preorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:430:40
[INFO] [stdout]     |
[INFO] [stdout] 430 | pub fn binary_tree_postorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_number`
[INFO] [stdout]    --> src/easy.rs:440:33
[INFO] [stdout]     |
[INFO] [stdout] 440 | pub fn excel_sheet_column_title(column_number: i32) -> String {
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:444:25
[INFO] [stdout]     |
[INFO] [stdout] 444 | pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_title`
[INFO] [stdout]    --> src/easy.rs:450:34
[INFO] [stdout]     |
[INFO] [stdout] 450 | pub fn excel_sheet_column_number(column_title: String) -> i32 {
[INFO] [stdout]     |                                  ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_title`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/easy.rs:454:21
[INFO] [stdout]     |
[INFO] [stdout] 454 | pub fn reverse_bits(x: u32) -> u32 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:458:25
[INFO] [stdout]     |
[INFO] [stdout] 458 | pub fn number_of_1_bits(n: i32) -> i32 {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:462:21
[INFO] [stdout]     |
[INFO] [stdout] 462 | pub fn happy_number(n: i32) -> bool {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:466:36
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/easy.rs:466:65
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:470:27
[INFO] [stdout]     |
[INFO] [stdout] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/easy.rs:470:38
[INFO] [stdout]     |
[INFO] [stdout] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:474:28
[INFO] [stdout]     |
[INFO] [stdout] 474 | pub fn reverse_linked_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:478:27
[INFO] [stdout]     |
[INFO] [stdout] 478 | pub fn contains_duplicate(nums: Vec<i32>) -> bool {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:482:30
[INFO] [stdout]     |
[INFO] [stdout] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> src/easy.rs:482:46
[INFO] [stdout]     |
[INFO] [stdout] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stdout]     |                                              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:486:34
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn count_complete_tree_nodes(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:492:27
[INFO] [stdout]     |
[INFO] [stdout] 492 | pub fn invert_binary_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:496:23
[INFO] [stdout]     |
[INFO] [stdout] 496 | pub fn summary_ranges(nums: Vec<i32>) -> Vec<String> {
[INFO] [stdout]     |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:500:21
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn power_of_two(n: i32) -> bool {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:506:31
[INFO] [stdout]     |
[INFO] [stdout] 506 | pub fn palindrome_linked_list(head: Option<Box<ListNode>>) -> bool {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:510:22
[INFO] [stdout]     |
[INFO] [stdout] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stdout]     |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/easy.rs:510:33
[INFO] [stdout]     |
[INFO] [stdout] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rsleetcode v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `num_rows`
[INFO] [stdout]    --> src/easy.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 404 | pub fn pascals_triangle(num_rows: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]     |                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_rows`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row_index`
[INFO] [stdout]    --> src/easy.rs:408:28
[INFO] [stdout]     |
[INFO] [stdout] 408 | pub fn pascals_triangle_ii(row_index: i32) -> Vec<i32> {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_row_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prices`
[INFO] [stdout]    --> src/easy.rs:412:40
[INFO] [stdout]     |
[INFO] [stdout] 412 | pub fn best_time_to_buy_and_sell_stock(prices: Vec<i32>) -> i32 {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_prices`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:416:25
[INFO] [stdout]     |
[INFO] [stdout] 416 | pub fn valid_palindrome(s: String) -> bool {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:420:22
[INFO] [stdout]     |
[INFO] [stdout] 420 | pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:426:39
[INFO] [stdout]     |
[INFO] [stdout] 426 | pub fn binary_tree_preorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:430:40
[INFO] [stdout]     |
[INFO] [stdout] 430 | pub fn binary_tree_postorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_number`
[INFO] [stdout]    --> src/easy.rs:440:33
[INFO] [stdout]     |
[INFO] [stdout] 440 | pub fn excel_sheet_column_title(column_number: i32) -> String {
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:444:25
[INFO] [stdout]     |
[INFO] [stdout] 444 | pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stdout]     |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_title`
[INFO] [stdout]    --> src/easy.rs:450:34
[INFO] [stdout]     |
[INFO] [stdout] 450 | pub fn excel_sheet_column_number(column_title: String) -> i32 {
[INFO] [stdout]     |                                  ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_title`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/easy.rs:454:21
[INFO] [stdout]     |
[INFO] [stdout] 454 | pub fn reverse_bits(x: u32) -> u32 {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:458:25
[INFO] [stdout]     |
[INFO] [stdout] 458 | pub fn number_of_1_bits(n: i32) -> i32 {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:462:21
[INFO] [stdout]     |
[INFO] [stdout] 462 | pub fn happy_number(n: i32) -> bool {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:466:36
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/easy.rs:466:65
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:470:27
[INFO] [stdout]     |
[INFO] [stdout] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/easy.rs:470:38
[INFO] [stdout]     |
[INFO] [stdout] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stdout]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:474:28
[INFO] [stdout]     |
[INFO] [stdout] 474 | pub fn reverse_linked_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:478:27
[INFO] [stdout]     |
[INFO] [stdout] 478 | pub fn contains_duplicate(nums: Vec<i32>) -> bool {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:482:30
[INFO] [stdout]     |
[INFO] [stdout] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> src/easy.rs:482:46
[INFO] [stdout]     |
[INFO] [stdout] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stdout]     |                                              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:486:34
[INFO] [stdout]     |
[INFO] [stdout] 486 | pub fn count_complete_tree_nodes(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/easy.rs:492:27
[INFO] [stdout]     |
[INFO] [stdout] 492 | pub fn invert_binary_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums`
[INFO] [stdout]    --> src/easy.rs:496:23
[INFO] [stdout]     |
[INFO] [stdout] 496 | pub fn summary_ranges(nums: Vec<i32>) -> Vec<String> {
[INFO] [stdout]     |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/easy.rs:500:21
[INFO] [stdout]     |
[INFO] [stdout] 500 | pub fn power_of_two(n: i32) -> bool {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `head`
[INFO] [stdout]    --> src/easy.rs:506:31
[INFO] [stdout]     |
[INFO] [stdout] 506 | pub fn palindrome_linked_list(head: Option<Box<ListNode>>) -> bool {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/easy.rs:510:22
[INFO] [stdout]     |
[INFO] [stdout] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stdout]     |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/easy.rs:510:33
[INFO] [stdout]     |
[INFO] [stdout] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stdout]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "85955e4141376af177b6f100ef01f3db05e52efcf753410baf934b1cbd04db2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85955e4141376af177b6f100ef01f3db05e52efcf753410baf934b1cbd04db2c", kill_on_drop: false }`
[INFO] [stdout] 85955e4141376af177b6f100ef01f3db05e52efcf753410baf934b1cbd04db2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 213cbb0cd9b5c30e99fc7d06e4b54de533a2cb8026d6c9d4eca1b7997b58bcc1
[INFO] running `Command { std: "docker" "start" "-a" "213cbb0cd9b5c30e99fc7d06e4b54de533a2cb8026d6c9d4eca1b7997b58bcc1", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `num_rows`
[INFO] [stderr]    --> src/easy.rs:404:25
[INFO] [stderr]     |
[INFO] [stderr] 404 | pub fn pascals_triangle(num_rows: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]     |                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_rows`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row_index`
[INFO] [stderr]    --> src/easy.rs:408:28
[INFO] [stderr]     |
[INFO] [stderr] 408 | pub fn pascals_triangle_ii(row_index: i32) -> Vec<i32> {
[INFO] [stderr]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_row_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prices`
[INFO] [stderr]    --> src/easy.rs:412:40
[INFO] [stderr]     |
[INFO] [stderr] 412 | pub fn best_time_to_buy_and_sell_stock(prices: Vec<i32>) -> i32 {
[INFO] [stderr]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_prices`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/easy.rs:416:25
[INFO] [stderr]     |
[INFO] [stderr] 416 | pub fn valid_palindrome(s: String) -> bool {
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nums`
[INFO] [stderr]    --> src/easy.rs:420:22
[INFO] [stderr]     |
[INFO] [stderr] 420 | pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `root`
[INFO] [stderr]    --> src/easy.rs:426:39
[INFO] [stderr]     |
[INFO] [stderr] 426 | pub fn binary_tree_preorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stderr]     |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `root`
[INFO] [stderr]    --> src/easy.rs:430:40
[INFO] [stderr]     |
[INFO] [stderr] 430 | pub fn binary_tree_postorder_traversal(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<i32> {
[INFO] [stderr]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column_number`
[INFO] [stderr]    --> src/easy.rs:440:33
[INFO] [stderr]     |
[INFO] [stderr] 440 | pub fn excel_sheet_column_title(column_number: i32) -> String {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nums`
[INFO] [stderr]    --> src/easy.rs:444:25
[INFO] [stderr]     |
[INFO] [stderr] 444 | pub fn majority_element(nums: Vec<i32>) -> i32 {
[INFO] [stderr]     |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column_title`
[INFO] [stderr]    --> src/easy.rs:450:34
[INFO] [stderr]     |
[INFO] [stderr] 450 | pub fn excel_sheet_column_number(column_title: String) -> i32 {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_title`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/easy.rs:454:21
[INFO] [stderr]     |
[INFO] [stderr] 454 | pub fn reverse_bits(x: u32) -> u32 {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/easy.rs:458:25
[INFO] [stderr]     |
[INFO] [stderr] 458 | pub fn number_of_1_bits(n: i32) -> i32 {
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/easy.rs:462:21
[INFO] [stderr]     |
[INFO] [stderr] 462 | pub fn happy_number(n: i32) -> bool {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `head`
[INFO] [stderr]    --> src/easy.rs:466:36
[INFO] [stderr]     |
[INFO] [stderr] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stderr]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]    --> src/easy.rs:466:65
[INFO] [stderr]     |
[INFO] [stderr] 466 | pub fn remove_linked_list_elements(head: Option<Box<ListNode>>, val: i32) -> Option<Box<ListNode>> {
[INFO] [stderr]     |                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/easy.rs:470:27
[INFO] [stderr]     |
[INFO] [stderr] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stderr]     |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/easy.rs:470:38
[INFO] [stderr]     |
[INFO] [stderr] 470 | pub fn isomorphic_strings(s: String, t: String) -> bool {
[INFO] [stderr]     |                                      ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `head`
[INFO] [stderr]    --> src/easy.rs:474:28
[INFO] [stderr]     |
[INFO] [stderr] 474 | pub fn reverse_linked_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stderr]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nums`
[INFO] [stderr]    --> src/easy.rs:478:27
[INFO] [stderr]     |
[INFO] [stderr] 478 | pub fn contains_duplicate(nums: Vec<i32>) -> bool {
[INFO] [stderr]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nums`
[INFO] [stderr]    --> src/easy.rs:482:30
[INFO] [stderr]     |
[INFO] [stderr] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stderr]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]    --> src/easy.rs:482:46
[INFO] [stderr]     |
[INFO] [stderr] 482 | pub fn contains_duplicate_ii(nums: Vec<i32>, k: i32) -> bool {
[INFO] [stderr]     |                                              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `root`
[INFO] [stderr]    --> src/easy.rs:486:34
[INFO] [stderr]     |
[INFO] [stderr] 486 | pub fn count_complete_tree_nodes(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stderr]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `root`
[INFO] [stderr]    --> src/easy.rs:492:27
[INFO] [stderr]     |
[INFO] [stderr] 492 | pub fn invert_binary_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stderr]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nums`
[INFO] [stderr]    --> src/easy.rs:496:23
[INFO] [stderr]     |
[INFO] [stderr] 496 | pub fn summary_ranges(nums: Vec<i32>) -> Vec<String> {
[INFO] [stderr]     |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/easy.rs:500:21
[INFO] [stderr]     |
[INFO] [stderr] 500 | pub fn power_of_two(n: i32) -> bool {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `head`
[INFO] [stderr]    --> src/easy.rs:506:31
[INFO] [stderr]     |
[INFO] [stderr] 506 | pub fn palindrome_linked_list(head: Option<Box<ListNode>>) -> bool {
[INFO] [stderr]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/easy.rs:510:22
[INFO] [stderr]     |
[INFO] [stderr] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stderr]     |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/easy.rs:510:33
[INFO] [stderr]     |
[INFO] [stderr] 510 | pub fn valid_anagram(s: String, t: String) -> bool {
[INFO] [stderr]     |                                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: `rsleetcode` (lib) generated 28 warnings (run `cargo fix --lib -p rsleetcode` to apply 28 suggestions)
[INFO] [stderr] warning: `rsleetcode` (lib test) generated 28 warnings (28 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rsleetcode-5b3b900ca805c992)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/easy_tests.rs (/opt/rustwide/target/debug/deps/easy_tests-87d3904ef9f99e1f)
[INFO] [stdout] 
[INFO] [stdout] running 25 tests
[INFO] [stdout] test test_add_binary ... ok
[INFO] [stdout] test test_balanced_binary_tree ... ok
[INFO] [stdout] test test_convert_sorted_array_to_binary_search_tree ... ok
[INFO] [stdout] test test_find_the_index_of_the_first_occurrence_in_a_string ... ok
[INFO] [stdout] test test_longest_common_prefix ... ok
[INFO] [stdout] test test_merge_sorted_array ... ok
[INFO] [stdout] test test_merge_two_sorted_lists ... ok
[INFO] [stdout] test test_maximum_depth_of_binary_tree ... ok
[INFO] [stdout] test test_palindrome_number ... ok
[INFO] [stdout] test test_path_sum ... ok
[INFO] [stdout] test test_remove_duplicates_from_sorted_array ... ok
[INFO] [stdout] test test_remove_element ... ok
[INFO] [stdout] test test_roman_to_integer ... ok
[INFO] [stdout] test test_sqrt_x ... ok
[INFO] [stdout] test test_two_sum ... ok
[INFO] [stdout] test test_climbing_stairs ... ok
[INFO] [stdout] test test_symmetric_tree ... ok
[INFO] [stdout] test test_same_tree ... ok
[INFO] [stdout] test test_valid_parentheses ... ok
[INFO] [stdout] test test_length_of_last_word ... ok
[INFO] [stdout] test test_search_insert_position ... ok
[INFO] [stdout] test test_remove_duplicates_from_sorted_list ... ok
[INFO] [stdout] test test_plus_one ... ok
[INFO] [stdout] test test_binary_tree_inorder_traversal ... ok
[INFO] [stdout] test test_minimum_depth_of_binary_tree ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 25 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/hard_tests.rs (/opt/rustwide/target/debug/deps/hard_tests-9c0cb9f049252607)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/medium_tests.rs (/opt/rustwide/target/debug/deps/medium_tests-c5f5dbc58d7dd8e2)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test test_add_two_numbers ... ok
[INFO] [stdout] test test_longest_substring_without_repeating_characters ... ok
[INFO] [stdout] test test_reverse_integer ... ok
[INFO] [stdout] test test_three_sum_closest ... ok
[INFO] [stdout] test test_string_to_integer_atoi ... ok
[INFO] [stdout] test test_container_with_most_water ... ok
[INFO] [stdout] test test_three_sum ... ok
[INFO] [stdout] test test_zigzag_conversion ... ok
[INFO] [stdout] test test_integer_to_roman ... ok
[INFO] [stdout] test test_longest_palindromic_substring ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rsleetcode
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "213cbb0cd9b5c30e99fc7d06e4b54de533a2cb8026d6c9d4eca1b7997b58bcc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "213cbb0cd9b5c30e99fc7d06e4b54de533a2cb8026d6c9d4eca1b7997b58bcc1", kill_on_drop: false }`
[INFO] [stdout] 213cbb0cd9b5c30e99fc7d06e4b54de533a2cb8026d6c9d4eca1b7997b58bcc1
