[INFO] cloning repository https://github.com/Kilerd/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kilerd/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKilerd%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKilerd%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 187ad50d630af17e7fa02bc075d8f94e67710f15
[INFO] checking Kilerd/leetcode-rust against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKilerd%2Fleetcode-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Kilerd/leetcode-rust on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Kilerd/leetcode-rust
[INFO] finished tweaking git repo https://github.com/Kilerd/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/Kilerd/leetcode-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Kilerd/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 51a6702616febb272f78829faf216c012e602c87b2efeb9c9bbc2eeadf6783fe
[INFO] running `Command { std: "docker" "start" "-a" "51a6702616febb272f78829faf216c012e602c87b2efeb9c9bbc2eeadf6783fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51a6702616febb272f78829faf216c012e602c87b2efeb9c9bbc2eeadf6783fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a6702616febb272f78829faf216c012e602c87b2efeb9c9bbc2eeadf6783fe", kill_on_drop: false }`
[INFO] [stdout] 51a6702616febb272f78829faf216c012e602c87b2efeb9c9bbc2eeadf6783fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 983335466e68cf71189c55bdb8dd086a92e2a6a426a0b574476569408be5cba8
[INFO] running `Command { std: "docker" "start" "-a" "983335466e68cf71189c55bdb8dd086a92e2a6a426a0b574476569408be5cba8", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::cmp::max`
[INFO] [stdout]   --> src/maximum_depth_of_binary_tree.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::cmp::max;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/apply_discount_every_n_orders.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ShlAssign`, `Shl`, `Shr`
[INFO] [stdout]  --> src/convert_a_number_to_hexadecimal.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::{Shl, ShlAssign, Shr};
[INFO] [stdout]   |                ^^^  ^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hint::unreachable_unchecked`
[INFO] [stdout]  --> src/convert_a_number_to_hexadecimal.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::unreachable_unchecked;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/container_with_most_water.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         /// two pointer solution
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 23 | 
[INFO] [stdout] 24 |         let mut start = 0usize;
[INFO] [stdout]    |         ----------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:15:21
[INFO] [stdout]    |
[INFO] [stdout] 15 |                 1000...std::i32::MAX => ("M", 1000),
[INFO] [stdout]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 900...1000 => ("CM", 900),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:17:20
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 500...900 => ("D", 500),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:18:20
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 400...500 => ("CD", 400),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 100...400 => ("C", 100),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:20:19
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 90...100 => ("XC", 90),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:21:19
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 50...90 => ("L", 50),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 40...50 => ("XL", 40),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 |                 10...40 => ("X", 10),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 5...9 => ("V", 5),
[INFO] [stdout]    |                  ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:27:18
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 1...4 => ("I", 1),
[INFO] [stdout]    |                  ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/nim_game.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |             1...3 => true,
[INFO] [stdout]    |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::i32`
[INFO] [stdout]   --> src/reverse_integer.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         use std::i32;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::min`
[INFO] [stdout]   --> src/three_sum_closest.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         use std::cmp::min;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::max`
[INFO] [stdout]   --> src/maximum_depth_of_binary_tree.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::cmp::max;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/apply_discount_every_n_orders.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ShlAssign`, `Shl`, `Shr`
[INFO] [stdout]  --> src/convert_a_number_to_hexadecimal.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::{Shl, ShlAssign, Shr};
[INFO] [stdout]   |                ^^^  ^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hint::unreachable_unchecked`
[INFO] [stdout]  --> src/convert_a_number_to_hexadecimal.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::unreachable_unchecked;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/container_with_most_water.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         /// two pointer solution
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 23 | 
[INFO] [stdout] 24 |         let mut start = 0usize;
[INFO] [stdout]    |         ----------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:15:21
[INFO] [stdout]    |
[INFO] [stdout] 15 |                 1000...std::i32::MAX => ("M", 1000),
[INFO] [stdout]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 900...1000 => ("CM", 900),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:17:20
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 500...900 => ("D", 500),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:18:20
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 400...500 => ("CD", 400),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 100...400 => ("C", 100),
[INFO] [stdout]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:20:19
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 90...100 => ("XC", 90),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:21:19
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 50...90 => ("L", 50),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 40...50 => ("XL", 40),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 |                 10...40 => ("X", 10),
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 5...9 => ("V", 5),
[INFO] [stdout]    |                  ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/integer_to_roman.rs:27:18
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 1...4 => ("I", 1),
[INFO] [stdout]    |                  ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/nim_game.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |             1...3 => true,
[INFO] [stdout]    |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::i32`
[INFO] [stdout]   --> src/reverse_integer.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         use std::i32;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::min`
[INFO] [stdout]   --> src/three_sum_closest.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         use std::cmp::min;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |                 1000...std::i32::MAX => ("M", 1000),
[INFO] [stdout]    |                 -------------------- this range overlaps on `1000_i32`...
[INFO] [stdout] 16 |                 900...1000 => ("CM", 900),
[INFO] [stdout]    |                 ^^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(overlapping_range_endpoints)]` on by default
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 900...1000 => ("CM", 900),
[INFO] [stdout]    |                 ---------- this range overlaps on `900_i32`...
[INFO] [stdout] 17 |                 500...900 => ("D", 500),
[INFO] [stdout]    |                 ^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 500...900 => ("D", 500),
[INFO] [stdout]    |                 --------- this range overlaps on `500_i32`...
[INFO] [stdout] 18 |                 400...500 => ("CD", 400),
[INFO] [stdout]    |                 ^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 400...500 => ("CD", 400),
[INFO] [stdout]    |                 --------- this range overlaps on `400_i32`...
[INFO] [stdout] 19 |                 100...400 => ("C", 100),
[INFO] [stdout]    |                 ^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 100...400 => ("C", 100),
[INFO] [stdout]    |                 --------- this range overlaps on `100_i32`...
[INFO] [stdout] 20 |                 90...100 => ("XC", 90),
[INFO] [stdout]    |                 ^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 90...100 => ("XC", 90),
[INFO] [stdout]    |                 -------- this range overlaps on `90_i32`...
[INFO] [stdout] 21 |                 50...90 => ("L", 50),
[INFO] [stdout]    |                 ^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 50...90 => ("L", 50),
[INFO] [stdout]    |                 ------- this range overlaps on `50_i32`...
[INFO] [stdout] 22 |                 40...50 => ("XL", 40),
[INFO] [stdout]    |                 ^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 40...50 => ("XL", 40),
[INFO] [stdout]    |                 ------- this range overlaps on `40_i32`...
[INFO] [stdout] 23 |                 10...40 => ("X", 10),
[INFO] [stdout]    |                 ^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/convert_a_number_to_hexadecimal.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         for i in 0..8 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `map` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/three_sum.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let value = map.get(&x).unwrap_or(&0);
[INFO] [stdout]    |                         --- immutable borrow occurs here
[INFO] [stdout] 18 |             map.insert(x, *value + 1);
[INFO] [stdout]    |             ^^^           ------ immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |                 1000...std::i32::MAX => ("M", 1000),
[INFO] [stdout]    |                 -------------------- this range overlaps on `1000_i32`...
[INFO] [stdout] 16 |                 900...1000 => ("CM", 900),
[INFO] [stdout]    |                 ^^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(overlapping_range_endpoints)]` on by default
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 900...1000 => ("CM", 900),
[INFO] [stdout]    |                 ---------- this range overlaps on `900_i32`...
[INFO] [stdout] 17 |                 500...900 => ("D", 500),
[INFO] [stdout]    |                 ^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 500...900 => ("D", 500),
[INFO] [stdout]    |                 --------- this range overlaps on `500_i32`...
[INFO] [stdout] 18 |                 400...500 => ("CD", 400),
[INFO] [stdout]    |                 ^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 400...500 => ("CD", 400),
[INFO] [stdout]    |                 --------- this range overlaps on `400_i32`...
[INFO] [stdout] 19 |                 100...400 => ("C", 100),
[INFO] [stdout]    |                 ^^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |                 100...400 => ("C", 100),
[INFO] [stdout]    |                 --------- this range overlaps on `100_i32`...
[INFO] [stdout] 20 |                 90...100 => ("XC", 90),
[INFO] [stdout]    |                 ^^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 90...100 => ("XC", 90),
[INFO] [stdout]    |                 -------- this range overlaps on `90_i32`...
[INFO] [stdout] 21 |                 50...90 => ("L", 50),
[INFO] [stdout]    |                 ^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 50...90 => ("L", 50),
[INFO] [stdout]    |                 ------- this range overlaps on `50_i32`...
[INFO] [stdout] 22 |                 40...50 => ("XL", 40),
[INFO] [stdout]    |                 ^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/integer_to_roman.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |                 40...50 => ("XL", 40),
[INFO] [stdout]    |                 ------- this range overlaps on `40_i32`...
[INFO] [stdout] 23 |                 10...40 => ("X", 10),
[INFO] [stdout]    |                 ^^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/convert_a_number_to_hexadecimal.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         for i in 0..8 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/combination_sum.rs:16:25
[INFO] [stdout]    |
[INFO] [stdout] 16 |                     let mut vec1 = Solution::combination_sum(candidates.clone(), target - *x);
[INFO] [stdout]    |                         ----^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/binary_tree_level_order_traversal.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/binary_tree_level_order_traversal.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `level_order`
[INFO] [stdout]   --> src/binary_tree_level_order_traversal.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn level_order(root: Option<Rc<RefCell<TreeNode>>>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/maximum_depth_of_binary_tree.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/maximum_depth_of_binary_tree.rs:43:10
[INFO] [stdout]    |
[INFO] [stdout] 43 |   pub fn new(val: i32) -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_depth`
[INFO] [stdout]   --> src/maximum_depth_of_binary_tree.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn max_depth(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/invert_binary_tree.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/invert_binary_tree.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `invert_tree`
[INFO] [stdout]   --> src/invert_binary_tree.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn invert_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/same_tree.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/same_tree.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 |   pub fn new(val: i32) -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_same_tree`
[INFO] [stdout]   --> src/same_tree.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn is_same_tree(p: Option<Rc<RefCell<TreeNode>>>, q: Option<Rc<RefCell<TreeNode>>>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cashier`
[INFO] [stdout]   --> src/apply_discount_every_n_orders.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Cashier {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/apply_discount_every_n_orders.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn new(n: i32, discount: i32, products: Vec<i32>, prices: Vec<i32>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_bill`
[INFO] [stdout]    --> src/apply_discount_every_n_orders.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn get_bill(&mut self, product: Vec<i32>, amount: Vec<i32>) -> f64 {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/convert_a_number_to_hexadecimal.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_hex`
[INFO] [stdout]   --> src/convert_a_number_to_hexadecimal.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn to_hex(num: i32) -> String {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/permutations.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `permute`
[INFO] [stdout]   --> src/permutations.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn permute(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/add_two_number.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers`
[INFO] [stdout]   --> src/add_two_number.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/array_partition_i.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `array_pair_sum`
[INFO] [stdout]  --> src/array_partition_i.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn array_pair_sum(nums: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/big_countries.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/big_countries.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/container_with_most_water.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max_area`
[INFO] [stdout]   --> src/container_with_most_water.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn max_area(height: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/di_string_match.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `di_string_match`
[INFO] [stdout]   --> src/di_string_match.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn di_string_match(s: String) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/divide_two_integers.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `divide`
[INFO] [stdout]  --> src/divide_two_integers.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn divide(dividend: i32, divisor: i32) -> i32 {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/flipping_an_image.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `flip_and_invert_image`
[INFO] [stdout]  --> src/flipping_an_image.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn flip_and_invert_image(a: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/generate_parentheses.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generate_parenthesis`
[INFO] [stdout]  --> src/generate_parentheses.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/hamming_distance.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hamming_distance`
[INFO] [stdout]   --> src/hamming_distance.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn hamming_distance(x: i32, y: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/implement_strstr.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `str_str`
[INFO] [stdout]   --> src/implement_strstr.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn str_str(haystack: String, needle: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/integer_to_roman.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `int_to_roman`
[INFO] [stdout]   --> src/integer_to_roman.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn int_to_roman(num: i32) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/jewels_and_stones.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution();
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `num_jewels_in_stones`
[INFO] [stdout]  --> src/jewels_and_stones.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn num_jewels_in_stones(j: String, s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/letter_combinations_of_a_phone_number.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `letter_combinations`
[INFO] [stdout]   --> src/letter_combinations_of_a_phone_number.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn letter_combinations(digits: String) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/list.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn new(val: i32) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_from_vec`
[INFO] [stdout]   --> src/list.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn build_from_vec(vec: Vec<i32>)-> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/longest_substring_without_repeating_characters.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring`
[INFO] [stdout]   --> src/longest_substring_without_repeating_characters.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/merge_two_binary_trees.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/merge_two_binary_trees.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `merge_trees`
[INFO] [stdout]   --> src/merge_two_binary_trees.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn merge_trees(
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/nim_game.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution();
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_win_nim`
[INFO] [stdout]  --> src/nim_game.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn can_win_nim(n: i32) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `RecentCounter`
[INFO] [stdout]  --> src/number_of_recent_calls.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct RecentCounter {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/number_of_recent_calls.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ping`
[INFO] [stdout]   --> src/number_of_recent_calls.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn ping(&mut self, t: i32) -> i32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/palindrome_number.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_palindrome`
[INFO] [stdout]   --> src/palindrome_number.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/peak_index_in_a_mountain_array.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peak_index_in_mountain_array`
[INFO] [stdout]   --> src/peak_index_in_a_mountain_array.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn peak_index_in_mountain_array(a: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/remove_duplicates_from_sorted_array.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_duplicates`
[INFO] [stdout]   --> src/remove_duplicates_from_sorted_array.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/remove_element.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_element`
[INFO] [stdout]   --> src/remove_element.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn remove_element(nums: &mut Vec<i32>, val: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/reverse_integer.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse`
[INFO] [stdout]   --> src/reverse_integer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn reverse(x: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/robot_return_to_origin.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `judge_circle`
[INFO] [stdout]  --> src/robot_return_to_origin.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn judge_circle(moves: String) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/search_in_rotated_sorted_array.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rotated_index`
[INFO] [stdout]  --> src/search_in_rotated_sorted_array.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn rotated_index(nums: &Vec<i32>, start: usize, end: usize) -> usize {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `search`
[INFO] [stdout]   --> src/search_in_rotated_sorted_array.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn search(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/self_dividing_numbers.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `self_dividing_numbers`
[INFO] [stdout]   --> src/self_dividing_numbers.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn self_dividing_numbers(left: i32, right: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/sort_array_by_parity.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `self_dividing_numbers`
[INFO] [stdout]   --> src/sort_array_by_parity.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn self_dividing_numbers(left: i32, right: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/sort_array_by_parity_ii.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sort_array_by_parity_ii`
[INFO] [stdout]   --> src/sort_array_by_parity_ii.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn sort_array_by_parity_ii(a: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/sort_colors.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sort_colors`
[INFO] [stdout]   --> src/sort_colors.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn sort_colors(nums: &mut Vec<i32>) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/string_to_integer_atoi.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `my_atoi`
[INFO] [stdout]   --> src/string_to_integer_atoi.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn my_atoi(str_: String) -> i32 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/sudoku_solver.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve_sudoku`
[INFO] [stdout]  --> src/sudoku_solver.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn solve_sudoku(board: &mut Vec<Vec<char>>) {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `invalid`
[INFO] [stdout]   --> src/sudoku_solver.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn invalid(board: &Vec<Vec<char>>, x: usize, y: usize) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/three_sum.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `three_sum`
[INFO] [stdout]   --> src/three_sum.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/three_sum_closest.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `three_sum_closest`
[INFO] [stdout]   --> src/three_sum_closest.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn three_sum_closest(nums: Vec<i32>, target: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/to_lower_case.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution();
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_lower_case`
[INFO] [stdout]   --> src/to_lower_case.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn to_lower_case(str: String) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/two_sum.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum`
[INFO] [stdout]   --> src/two_sum.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/unique_email_addresses.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution();
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `num_unique_emails`
[INFO] [stdout]   --> src/unique_email_addresses.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn num_unique_emails(emails: Vec<String>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/unique_morse_code_words.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution();
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unique_morse_representations`
[INFO] [stdout]   --> src/unique_morse_code_words.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn unique_morse_representations(words: Vec<String>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/valid_parentheses.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]   --> src/valid_parentheses.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn is_valid(s: String) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/valid_sudoku.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid_sudoku`
[INFO] [stdout]  --> src/valid_sudoku.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn is_valid_sudoku(board: Vec<Vec<char>>) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/zigzag_conversion.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `convert`
[INFO] [stdout]   --> src/zigzag_conversion.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn convert(s: String, num_rows: i32) -> String {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/combination_sum.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `combination_sum`
[INFO] [stdout]   --> src/combination_sum.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn combination_sum(candidates: Vec<i32>, target: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/sort_colors.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 |             let value = if 0 <= i && i < counts[0] {
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 136 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/sudoku_solver.rs:106:13
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let mut expected_solution = vec![
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/sudoku_solver.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let mut expected_solution = vec![
[INFO] [stdout]     |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `map` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/three_sum.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let value = map.get(&x).unwrap_or(&0);
[INFO] [stdout]    |                         --- immutable borrow occurs here
[INFO] [stdout] 18 |             map.insert(x, *value + 1);
[INFO] [stdout]    |             ^^^           ------ immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/combination_sum.rs:16:25
[INFO] [stdout]    |
[INFO] [stdout] 16 |                     let mut vec1 = Solution::combination_sum(candidates.clone(), target - *x);
[INFO] [stdout]    |                         ----^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/invert_binary_tree.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/invert_binary_tree.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `invert_tree`
[INFO] [stdout]   --> src/invert_binary_tree.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn invert_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/big_countries.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/big_countries.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/list.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn new(val: i32) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/merge_two_binary_trees.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/merge_two_binary_trees.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Solution;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `merge_trees`
[INFO] [stdout]   --> src/merge_two_binary_trees.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn merge_trees(
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `RecentCounter`
[INFO] [stdout]  --> src/number_of_recent_calls.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct RecentCounter {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/number_of_recent_calls.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ping`
[INFO] [stdout]   --> src/number_of_recent_calls.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn ping(&mut self, t: i32) -> i32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/sort_colors.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 |             let value = if 0 <= i && i < counts[0] {
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 45 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "983335466e68cf71189c55bdb8dd086a92e2a6a426a0b574476569408be5cba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "983335466e68cf71189c55bdb8dd086a92e2a6a426a0b574476569408be5cba8", kill_on_drop: false }`
[INFO] [stdout] 983335466e68cf71189c55bdb8dd086a92e2a6a426a0b574476569408be5cba8