[INFO] cloning repository https://github.com/htoopyaelinn56/leet_code_exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/htoopyaelinn56/leet_code_exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Fleet_code_exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Fleet_code_exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1738dcea10d3dcba7be2f66cd2eaca9547c7c612
[INFO] checking htoopyaelinn56/leet_code_exercise against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Fleet_code_exercise" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] /workspace/builds/worker-1-tc2/source/.git/refs: No space left on device
[INFO] checking htoopyaelinn56/leet_code_exercise against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Fleet_code_exercise" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/htoopyaelinn56/leet_code_exercise on toolchain 15e8bc6907ab2b3623cb52acc726f4787458df64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/htoopyaelinn56/leet_code_exercise
[INFO] finished tweaking git repo https://github.com/htoopyaelinn56/leet_code_exercise
[INFO] tweaked toml for git repo https://github.com/htoopyaelinn56/leet_code_exercise written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/htoopyaelinn56/leet_code_exercise already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f49de5e2a99ab9b133057087f4ddd86523f7fc79718d565b069fca675c3e2a2a
[INFO] running `Command { std: "docker" "start" "-a" "f49de5e2a99ab9b133057087f4ddd86523f7fc79718d565b069fca675c3e2a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f49de5e2a99ab9b133057087f4ddd86523f7fc79718d565b069fca675c3e2a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f49de5e2a99ab9b133057087f4ddd86523f7fc79718d565b069fca675c3e2a2a", kill_on_drop: false }`
[INFO] [stdout] f49de5e2a99ab9b133057087f4ddd86523f7fc79718d565b069fca675c3e2a2a
[INFO] checking htoopyaelinn56/leet_code_exercise against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Fleet_code_exercise" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/htoopyaelinn56/leet_code_exercise on toolchain 15e8bc6907ab2b3623cb52acc726f4787458df64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/htoopyaelinn56/leet_code_exercise
[INFO] finished tweaking git repo https://github.com/htoopyaelinn56/leet_code_exercise
[INFO] tweaked toml for git repo https://github.com/htoopyaelinn56/leet_code_exercise written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/htoopyaelinn56/leet_code_exercise already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3aa5a75290594ddf6b54432c5fed3497d34fa97130dc179a86d539d75eabf333
[INFO] running `Command { std: "docker" "start" "-a" "3aa5a75290594ddf6b54432c5fed3497d34fa97130dc179a86d539d75eabf333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3aa5a75290594ddf6b54432c5fed3497d34fa97130dc179a86d539d75eabf333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa5a75290594ddf6b54432c5fed3497d34fa97130dc179a86d539d75eabf333", kill_on_drop: false }`
[INFO] [stdout] 3aa5a75290594ddf6b54432c5fed3497d34fa97130dc179a86d539d75eabf333
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb15000cd4027d11f003ef77f5e02cbc590154f2d08af777a4d9e217609b35f7
[INFO] running `Command { std: "docker" "start" "-a" "bb15000cd4027d11f003ef77f5e02cbc590154f2d08af777a4d9e217609b35f7", kill_on_drop: false }`
[INFO] [stderr]     Checking leet_code_exercise v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Binary`
[INFO] [stdout]  --> src/top_k_frequent_elements.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Binary;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/top_k_frequent_elements.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         /// store (frequency, item) pair in max_heap
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 59 |         let mut my_binary_heap: BinaryHeap<(u32, i32)> = BinaryHeap::new();
[INFO] [stdout]    |         ------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/product_of_array_except_self.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/product_of_array_except_self.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Binary`
[INFO] [stdout]  --> src/top_k_frequent_elements.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Binary;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/top_k_frequent_elements.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         /// store (frequency, item) pair in max_heap
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 59 |         let mut my_binary_heap: BinaryHeap<(u32, i32)> = BinaryHeap::new();
[INFO] [stdout]    |         ------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/product_of_array_except_self.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/product_of_array_except_self.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/top_k_frequent_elements.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         for (key, value) in &item_with_frequency {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/two_sum.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `two_sum` is never used
[INFO] [stdout]  --> src/two_sum.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/contains_duplicate.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `contains_duplicate` is never used
[INFO] [stdout]  --> src/contains_duplicate.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn contains_duplicate(nums: Vec<i32>) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/valid_anagram.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_anagram` is never used
[INFO] [stdout]  --> src/valid_anagram.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn is_anagram(s: String, t: String) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/group_anagrams.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `ASCII_SMALL_A` and `group_anagrams` are never used
[INFO] [stdout]  --> src/group_anagrams.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated items in this implementation
[INFO] [stdout] 6 |     const ASCII_SMALL_A: u32 = 97;
[INFO] [stdout]   |           ^^^^^^^^^^^^^
[INFO] [stdout] 7 |     pub fn group_anagrams(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/top_k_frequent_elements.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `top_k_frequent_using_hashmap_only`, `top_k_frequent_using_binary_heap`, and `top_k_frequent_using_buckets` are never used
[INFO] [stdout]   --> src/top_k_frequent_elements.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 9  |     pub fn top_k_frequent_using_hashmap_only(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn top_k_frequent_using_binary_heap(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn top_k_frequent_using_buckets(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/product_of_array_except_self.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `product_except_self` and `product_except_self_optimized` are never used
[INFO] [stdout]   --> src/product_of_array_except_self.rs:7:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] 7  |     pub fn product_except_self(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn product_except_self_optimized(nums: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/valid_sudoku.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_valid_sudoku` is never used
[INFO] [stdout]  --> src/valid_sudoku.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub fn is_valid_sudoku(board: Vec<Vec<char>>) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/longest_consecutive.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `longest_consecutive` is never used
[INFO] [stdout]  --> src/longest_consecutive.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub fn longest_consecutive(nums: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/is_palindrome.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_palindrome` is never used
[INFO] [stdout]  --> src/is_palindrome.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 6 |     pub fn is_palindrome(s: String) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/two_sum_2.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `two_sum` is never used
[INFO] [stdout]  --> src/two_sum_2.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 4 |     pub fn two_sum(numbers: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/three_sum.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solution {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `three_sum` is never used
[INFO] [stdout]  --> src/three_sum.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/top_k_frequent_elements.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         for (key, value) in &item_with_frequency {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/two_sum.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `two_sum` is never used
[INFO] [stdout]  --> src/two_sum.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/contains_duplicate.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `contains_duplicate` is never used
[INFO] [stdout]  --> src/contains_duplicate.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn contains_duplicate(nums: Vec<i32>) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "bb15000cd4027d11f003ef77f5e02cbc590154f2d08af777a4d9e217609b35f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb15000cd4027d11f003ef77f5e02cbc590154f2d08af777a4d9e217609b35f7", kill_on_drop: false }`
[INFO] [stdout] bb15000cd4027d11f003ef77f5e02cbc590154f2d08af777a4d9e217609b35f7