[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] eac7b035d7e350f4a212632afea9af04728333e2
[INFO] checking tolumide-ng/coding-challenge against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftolumide-ng%2Fcoding-challenge" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tolumide-ng/coding-challenge on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "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-9/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: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "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] 2e1b7e6805c92bb78941333afc82dd07b183b3b14ed0f5fe0d2a986220ab8900
[INFO] running `Command { std: "docker" "start" "-a" "2e1b7e6805c92bb78941333afc82dd07b183b3b14ed0f5fe0d2a986220ab8900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e1b7e6805c92bb78941333afc82dd07b183b3b14ed0f5fe0d2a986220ab8900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e1b7e6805c92bb78941333afc82dd07b183b3b14ed0f5fe0d2a986220ab8900", kill_on_drop: false }`
[INFO] [stdout] 2e1b7e6805c92bb78941333afc82dd07b183b3b14ed0f5fe0d2a986220ab8900
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "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] 70e57614620198aca2e1a3c31a0c7a258f59ae620c1469c3f159adc2b7721461
[INFO] running `Command { std: "docker" "start" "-a" "70e57614620198aca2e1a3c31a0c7a258f59ae620c1469c3f159adc2b7721461", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir/algorithms)
[INFO] [stderr]     Checking dynamic_pg v0.1.0 (/opt/rustwide/workdir/dynamic_pg)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> algorithms/src/the_algos/two_sums.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_rcs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_rcs.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> data_structures/src/linked_lists/linked_rcs.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> data_structures/src/linked_lists/node.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> dynamic_pg/src/dynamic_programming/grid_traveller.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     use std::cmp;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> dynamic_pg/src/dynamic_programming/how_sum.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     use std::cell::RefCell;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> dynamic_pg/src/dynamic_programming/grid_traveller.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     use std::cmp;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> dynamic_pg/src/dynamic_programming/how_sum.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     use std::cell::RefCell;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next_node`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_list_reversed.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let next_node: SpecNode = None;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_rcs.rs:93:26
[INFO] [stdout]    |
[INFO] [stdout] 93 |                     Some(x) => {}
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_neighbour`
[INFO] [stdout]   --> data_structures/src/linked_lists/reverse_linked_lists.rs:67:22
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 Some(ref new_neighbour) => {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_neighbour`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next_node`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_list_reversed.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let next_node: SpecNode = None;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_rcs.rs:93:26
[INFO] [stdout]    |
[INFO] [stdout] 93 |                     Some(x) => {}
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_neighbour`
[INFO] [stdout]   --> data_structures/src/linked_lists/reverse_linked_lists.rs:67:22
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 Some(ref new_neighbour) => {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_neighbour`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> data_structures/src/linked_lists/reverse_linked_lists.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut curr = match self.head {
[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: associated function is never used: `add_at_index`
[INFO] [stdout]   --> data_structures/src/linked_lists/leet_singly_ll.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn add_at_index(&mut self, index: i32, val: i32) {
[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: `delete_at_index`
[INFO] [stdout]   --> data_structures/src/linked_lists/leet_singly_ll.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn delete_at_index(&mut self, index: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `val`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     val: i32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     next: Option<Box<Node>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     head: Option<Box<Node>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_cycle`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn has_cycle(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle_pos.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LinkedList`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle_pos.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct LinkedList {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cycle_position`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle_pos.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn cycle_position(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_list_reversed.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_list_reversed.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn add(&mut self, value: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_list`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_list_reversed.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn reverse_list(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_lists_intercept.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LinkedList`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_lists_intercept.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct LinkedList {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_interception`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_lists_intercept.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn get_interception(&self) -> Option<Rc<Node>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_linked_list`
[INFO] [stdout]   --> data_structures/src/linked_lists/reverse_linked_lists.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn reverse_linked_list(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> data_structures/src/linked_lists/single_ll.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_at_head`
[INFO] [stdout]   --> data_structures/src/linked_lists/single_ll.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn add_at_head(&mut self, value: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_at_tail`
[INFO] [stdout]   --> data_structures/src/linked_lists/single_ll.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn add_at_tail(&mut self, value: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> data_structures/src/linked_lists/single_ll.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, index: i32) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_at_index`
[INFO] [stdout]   --> data_structures/src/linked_lists/single_ll.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn add_at_index(&mut self, index: i32, value: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_at_index`
[INFO] [stdout]    --> data_structures/src/linked_lists/single_ll.rs:137:8
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn delete_at_index(&mut self, index: i32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> data_structures/src/linked_lists/reverse_linked_lists.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut curr = match self.head {
[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: associated function is never used: `add_at_index`
[INFO] [stdout]   --> data_structures/src/linked_lists/leet_singly_ll.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn add_at_index(&mut self, index: i32, val: i32) {
[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: `delete_at_index`
[INFO] [stdout]   --> data_structures/src/linked_lists/leet_singly_ll.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn delete_at_index(&mut self, index: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `val`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     val: i32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     next: Option<Box<Node>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     head: Option<Box<Node>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `has_cycle`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn has_cycle(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_cycle_pos.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LinkedList`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle_pos.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct LinkedList {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cycle_position`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_cycle_pos.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn cycle_position(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> data_structures/src/linked_lists/linked_lists_intercept.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LinkedList`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_lists_intercept.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct LinkedList {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_interception`
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_lists_intercept.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn get_interception(&self) -> Option<Rc<Node>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse_linked_list`
[INFO] [stdout]   --> data_structures/src/linked_lists/reverse_linked_lists.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn reverse_linked_list(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Map` that must be used
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_lists_intercept.rs:41:21
[INFO] [stdout]    |
[INFO] [stdout] 41 | /                     vec_safe.iter().map(|val| {
[INFO] [stdout] 42 | |                         if Rc::as_ptr(curr) == Rc::as_ptr(val) {
[INFO] [stdout] 43 | |                             is_intercept = true;
[INFO] [stdout] 44 | |                             intercept = Some(Rc::clone(curr));
[INFO] [stdout] 45 | |                         }
[INFO] [stdout] 46 | |                     });
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Map` that must be used
[INFO] [stdout]   --> data_structures/src/linked_lists/linked_lists_intercept.rs:41:21
[INFO] [stdout]    |
[INFO] [stdout] 41 | /                     vec_safe.iter().map(|val| {
[INFO] [stdout] 42 | |                         if Rc::as_ptr(curr) == Rc::as_ptr(val) {
[INFO] [stdout] 43 | |                             is_intercept = true;
[INFO] [stdout] 44 | |                             intercept = Some(Rc::clone(curr));
[INFO] [stdout] 45 | |                         }
[INFO] [stdout] 46 | |                     });
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "70e57614620198aca2e1a3c31a0c7a258f59ae620c1469c3f159adc2b7721461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70e57614620198aca2e1a3c31a0c7a258f59ae620c1469c3f159adc2b7721461", kill_on_drop: false }`
[INFO] [stdout] 70e57614620198aca2e1a3c31a0c7a258f59ae620c1469c3f159adc2b7721461