[INFO] cloning repository https://github.com/tolumide-ng/coding-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tolumide-ng/coding-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f086f2c577d12dfbcf99f99bba55dae91f64d928
[INFO] checking tolumide-ng/coding-challenge against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tolumide-ng/coding-challenge on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tolumide-ng/coding-challenge
[INFO] finished tweaking git repo https://github.com/tolumide-ng/coding-challenge
[INFO] tweaked toml for git repo https://github.com/tolumide-ng/coding-challenge written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tolumide-ng/coding-challenge 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6c5f95f846c4dc71d5c2384da1f0bcfe43c6cd3cfe4b21f32f569b3cd48e631
[INFO] running `Command { std: "docker" "start" "-a" "f6c5f95f846c4dc71d5c2384da1f0bcfe43c6cd3cfe4b21f32f569b3cd48e631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6c5f95f846c4dc71d5c2384da1f0bcfe43c6cd3cfe4b21f32f569b3cd48e631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6c5f95f846c4dc71d5c2384da1f0bcfe43c6cd3cfe4b21f32f569b3cd48e631", kill_on_drop: false }`
[INFO] [stdout] f6c5f95f846c4dc71d5c2384da1f0bcfe43c6cd3cfe4b21f32f569b3cd48e631
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6169056f476ae8376ce5e1ee1013ed8ca9ada08c89db7361ca37852364fe1fd1
[INFO] running `Command { std: "docker" "start" "-a" "6169056f476ae8376ce5e1ee1013ed8ca9ada08c89db7361ca37852364fe1fd1", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]     Checking dynamic_pg v0.1.0 (/opt/rustwide/workdir/dynamic_pg)
[INFO] [stdout] warning: fields `memo`, `aggregator`, and `target` are never read
[INFO] [stdout]   --> dynamic_pg/src/dynamic_programming/all_construct.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     struct AllConstructs {
[INFO] [stdout]    |            ------------- fields in this struct
[INFO] [stdout] 14 |         dic: Vec<&'static str>,
[INFO] [stdout] 15 |         memo: HashMap<String, &'static str>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 16 |         aggregator: ReturnType,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 17 |         target: String,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AllConstructs` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `memo`, `aggregator`, and `target` are never read
[INFO] [stdout]   --> dynamic_pg/src/dynamic_programming/all_construct.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     struct AllConstructs {
[INFO] [stdout]    |            ------------- fields in this struct
[INFO] [stdout] 14 |         dic: Vec<&'static str>,
[INFO] [stdout] 15 |         memo: HashMap<String, &'static str>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 16 |         aggregator: ReturnType,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 17 |         target: String,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AllConstructs` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> data_structures/src/recursion/create_bst.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let mut parent_node = queue.get_mut(0).unwrap();
[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: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `realistic_size` is never read
[INFO] [stdout]   --> data_structures/src/binary_tree/priority_queue.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct BinaryHeap<T> {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     realistic_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BinaryHeap` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stack` is never read
[INFO] [stdout]   --> data_structures/src/queues_stacks/inorder_traversal.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub struct Traversal {
[INFO] [stdout]    |                --------- field in this struct
[INFO] [stdout] 18 |         stack: Vec<Option<Rc<RefCell<TreeNode>>>>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Traversal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `deadlocks`, `target`, and `expected` are never read
[INFO] [stdout]   --> data_structures/src/queues_stacks/open_the_lock.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct Handler {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 95 |     deadlocks: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 96 |     target: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 97 |     expected: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Handler` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parenthesis` is never constructed
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Parenthesis {}
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `generate_parenthesis` and `backtrack` are never used
[INFO] [stdout]   --> data_structures/src/recursion/generate_parenthesis.rs:3:12
[INFO] [stdout]    |
[INFO] [stdout] 2  | impl Parenthesis {
[INFO] [stdout]    | ---------------- associated functions in this implementation
[INFO] [stdout] 3  |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     fn backtrack(
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cache` and `n` are never read
[INFO] [stdout]   --> data_structures/src/recursion/unique_binary_tree.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct UniqueBst {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 26 |     // since constraint already state that n is 1 <= n <= 8, we can caceh a 2,3 tree as either 23 or 32
[INFO] [stdout] 27 |     cache: HashMap<String, TreeVec>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 28 |     n: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UniqueBst` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking others v0.1.0 (/opt/rustwide/workdir/others)
[INFO] [stdout] warning: function `histogram_brute_force` is never used
[INFO] [stdout]  --> others/src/the_algos/largest_rectangle_histogram.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub fn histogram_brute_force(heights: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_area` is never used
[INFO] [stdout]   --> others/src/the_algos/largest_rectangle_histogram.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn calculate_area(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `histogram_stack_approach` is never used
[INFO] [stdout]   --> others/src/the_algos/largest_rectangle_histogram.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn histogram_stack_approach(heights: Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> data_structures/src/recursion/create_bst.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let mut parent_node = queue.get_mut(0).unwrap();
[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: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `realistic_size` is never read
[INFO] [stdout]   --> data_structures/src/binary_tree/priority_queue.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct BinaryHeap<T> {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     realistic_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BinaryHeap` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stack` is never read
[INFO] [stdout]   --> data_structures/src/queues_stacks/inorder_traversal.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub struct Traversal {
[INFO] [stdout]    |                --------- field in this struct
[INFO] [stdout] 18 |         stack: Vec<Option<Rc<RefCell<TreeNode>>>>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Traversal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cache` and `n` are never read
[INFO] [stdout]   --> data_structures/src/recursion/unique_binary_tree.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct UniqueBst {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 26 |     // since constraint already state that n is 1 <= n <= 8, we can caceh a 2,3 tree as either 23 or 32
[INFO] [stdout] 27 |     cache: HashMap<String, TreeVec>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 28 |     n: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UniqueBst` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> data_structures/src/recursion/create_bst.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let mut parent_node = queue.get_mut(0).unwrap();
[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: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `realistic_size` is never read
[INFO] [stdout]   --> data_structures/src/binary_tree/priority_queue.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct BinaryHeap<T> {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     realistic_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BinaryHeap` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stack` is never read
[INFO] [stdout]   --> data_structures/src/queues_stacks/inorder_traversal.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub struct Traversal {
[INFO] [stdout]    |                --------- field in this struct
[INFO] [stdout] 18 |         stack: Vec<Option<Rc<RefCell<TreeNode>>>>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Traversal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `deadlocks`, `target`, and `expected` are never read
[INFO] [stdout]   --> data_structures/src/queues_stacks/open_the_lock.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct Handler {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 95 |     deadlocks: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 96 |     target: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 97 |     expected: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Handler` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parenthesis` is never constructed
[INFO] [stdout]  --> data_structures/src/recursion/generate_parenthesis.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Parenthesis {}
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `generate_parenthesis` and `backtrack` are never used
[INFO] [stdout]   --> data_structures/src/recursion/generate_parenthesis.rs:3:12
[INFO] [stdout]    |
[INFO] [stdout] 2  | impl Parenthesis {
[INFO] [stdout]    | ---------------- associated functions in this implementation
[INFO] [stdout] 3  |     pub fn generate_parenthesis(n: i32) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     fn backtrack(
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cache` and `n` are never read
[INFO] [stdout]   --> data_structures/src/recursion/unique_binary_tree.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct UniqueBst {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 26 |     // since constraint already state that n is 1 <= n <= 8, we can caceh a 2,3 tree as either 23 or 32
[INFO] [stdout] 27 |     cache: HashMap<String, TreeVec>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 28 |     n: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UniqueBst` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> data_structures/src/recursion/create_bst.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |             let mut parent_node = queue.get_mut(0).unwrap();
[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: unused variable: `pn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:108:15
[INFO] [stdout]     |
[INFO] [stdout] 108 |         (Some(pn), None) => false,
[INFO] [stdout]     |               ^^ help: if this is intentional, prefix it with an underscore: `_pn`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qn`
[INFO] [stdout]    --> data_structures/src/recursion/same_tree.rs:109:21
[INFO] [stdout]     |
[INFO] [stdout] 109 |         (None, Some(qn)) => false,
[INFO] [stdout]     |                     ^^ help: if this is intentional, prefix it with an underscore: `_qn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `realistic_size` is never read
[INFO] [stdout]   --> data_structures/src/binary_tree/priority_queue.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct BinaryHeap<T> {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     realistic_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BinaryHeap` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stack` is never read
[INFO] [stdout]   --> data_structures/src/queues_stacks/inorder_traversal.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub struct Traversal {
[INFO] [stdout]    |                --------- field in this struct
[INFO] [stdout] 18 |         stack: Vec<Option<Rc<RefCell<TreeNode>>>>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Traversal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cache` and `n` are never read
[INFO] [stdout]   --> data_structures/src/recursion/unique_binary_tree.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct UniqueBst {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 26 |     // since constraint already state that n is 1 <= n <= 8, we can caceh a 2,3 tree as either 23 or 32
[INFO] [stdout] 27 |     cache: HashMap<String, TreeVec>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 28 |     n: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UniqueBst` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "6169056f476ae8376ce5e1ee1013ed8ca9ada08c89db7361ca37852364fe1fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6169056f476ae8376ce5e1ee1013ed8ca9ada08c89db7361ca37852364fe1fd1", kill_on_drop: false }`
[INFO] [stdout] 6169056f476ae8376ce5e1ee1013ed8ca9ada08c89db7361ca37852364fe1fd1