[INFO] updating cached repository rotwatsb/code_kata
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rotwatsb/code_kata
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rotwatsb/code_kata" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/rotwatsb/code_kata"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/rotwatsb/code_kata'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rotwatsb/code_kata" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/rotwatsb/code_kata"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/rotwatsb/code_kata'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 232189e70ed0dbb1665ab38aacc282a839c80a63
[INFO] sha for GitHub repo rotwatsb/code_kata: 232189e70ed0dbb1665ab38aacc282a839c80a63
[INFO] validating manifest of rotwatsb/code_kata on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rotwatsb/code_kata on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rotwatsb/code_kata
[INFO] finished frobbing rotwatsb/code_kata
[INFO] frobbed toml for rotwatsb/code_kata written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/rotwatsb/code_kata/Cargo.toml
[INFO] started frobbing rotwatsb/code_kata
[INFO] finished frobbing rotwatsb/code_kata
[INFO] frobbed toml for rotwatsb/code_kata written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/rotwatsb/code_kata/Cargo.toml
[INFO] crate rotwatsb/code_kata already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/rotwatsb/code_kata/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rotwatsb/code_kata against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-7/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/rotwatsb/code_kata:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8b6799f6596919c9919beca686e9bb39891011806125b0c3c676b8de40e2fc31
[INFO] running `"docker" "start" "-a" "8b6799f6596919c9919beca686e9bb39891011806125b0c3c676b8de40e2fc31"`
[INFO] [stderr]     Checking code_kata v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/euler/longest_collatz_14.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 | /             (if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stderr] 30 | |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) });
[INFO] [stderr]    | |______________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 29 |             if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stderr] 30 |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/euler/triangular_12.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils`
[INFO] [stderr]  --> src/hackerrank/modfib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use utils;
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/hackerrank/cut_the_tree.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/hackerrank/knapsack.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 | /         (if sizes[n] > c {
[INFO] [stderr] 29 | |             if n == 0 { return 0; }
[INFO] [stderr] 30 | |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stderr] 31 | |          }
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |                       max_knapsack(c, n - 1, sizes, values, memoized))
[INFO] [stderr] 36 | |          });
[INFO] [stderr]    | |___________^
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 28 |         if sizes[n] > c {
[INFO] [stderr] 29 |             if n == 0 { return 0; }
[INFO] [stderr] 30 |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stderr] 31 |          }
[INFO] [stderr] 32 |          else {
[INFO] [stderr] 33 |              if n == 0 { return values[0]; }
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:33:30
[INFO] [stderr]    |
[INFO] [stderr] 33 |     *max_sum = max(*max_sum, (sum_of_sums + vals[i]));
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/euler/longest_collatz_14.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 | /             (if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stderr] 30 | |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) });
[INFO] [stderr]    | |______________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 29 |             if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stderr] 30 |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/euler/triangular_12.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils`
[INFO] [stderr]  --> src/hackerrank/modfib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use utils;
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/hackerrank/cut_the_tree.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/hackerrank/knapsack.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 | /         (if sizes[n] > c {
[INFO] [stderr] 29 | |             if n == 0 { return 0; }
[INFO] [stderr] 30 | |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stderr] 31 | |          }
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |                       max_knapsack(c, n - 1, sizes, values, memoized))
[INFO] [stderr] 36 | |          });
[INFO] [stderr]    | |___________^
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 28 |         if sizes[n] > c {
[INFO] [stderr] 29 |             if n == 0 { return 0; }
[INFO] [stderr] 30 |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stderr] 31 |          }
[INFO] [stderr] 32 |          else {
[INFO] [stderr] 33 |              if n == 0 { return values[0]; }
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:33:30
[INFO] [stderr]    |
[INFO] [stderr] 33 |     *max_sum = max(*max_sum, (sum_of_sums + vals[i]));
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/utils.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     for i in 1 .. nodes {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/utils.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     for i in 0..r {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/utils.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |         for j in 0..c {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `num_digits` is never read
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut num_digits: usize = 0;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `t` is never read
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut t: usize = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `d` is never read
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut d: usize = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 |         'inner: for i in 1..num_digits {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `v` is never read
[INFO] [stderr]  --> src/euler/triangular_12.rs:8:13
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut v: usize = 0;
[INFO] [stderr]   |             ^
[INFO] [stderr]   |
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sign`
[INFO] [stderr]   --> src/hackerrank/modfib.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let (sign, v) = starts[2].to_bytes_le();
[INFO] [stderr]    |          ^^^^ help: consider prefixing with an underscore: `_sign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]  --> src/hackerrank/the_grid_search.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     for t in 0u32..t_str.trim().parse().unwrap() {
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     for i in 0..r {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/hackerrank/knapsack.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     for i in 0..n {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `max`
[INFO] [stderr]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let max = max_path(0, 0, &vals, &cnxs, &mut max_sum);
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_max`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/utils.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     for i in 1 .. nodes {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/utils.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     for i in 0..r {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/utils.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |         for j in 0..c {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `num_digits` is never read
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut num_digits: usize = 0;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `t` is never read
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut t: usize = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `d` is never read
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut d: usize = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 |         'inner: for i in 1..num_digits {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `v` is never read
[INFO] [stderr]  --> src/euler/triangular_12.rs:8:13
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut v: usize = 0;
[INFO] [stderr]   |             ^
[INFO] [stderr]   |
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sign`
[INFO] [stderr]   --> src/hackerrank/modfib.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let (sign, v) = starts[2].to_bytes_le();
[INFO] [stderr]    |          ^^^^ help: consider prefixing with an underscore: `_sign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]  --> src/hackerrank/the_grid_search.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     for t in 0u32..t_str.trim().parse().unwrap() {
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     for i in 0..r {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/hackerrank/knapsack.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     for i in 0..n {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `max`
[INFO] [stderr]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let max = max_path(0, 0, &vals, &cnxs, &mut max_sum);
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_max`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut primes2 = primes.clone();
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut primes2 = primes.clone();
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_usize_pair`
[INFO] [stderr]   --> src/utils.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn read_usize_pair() -> (usize, usize) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_matrix_u32`
[INFO] [stderr]   --> src/utils.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn read_matrix_u32() -> Vec<Vec<u32>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `UPPER_BOUND`
[INFO] [stderr]  --> src/euler/circular_primes_35.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const UPPER_BOUND: usize = 1000000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `circularprimes`
[INFO] [stderr]  --> src/euler/circular_primes_35.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn circularprimes() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_prime`
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn is_prime(n: usize, primes: &Vec<usize>) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `UPPER_BOUND`
[INFO] [stderr]  --> src/euler/longest_collatz_14.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | const UPPER_BOUND: usize = 1000000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_collatz`
[INFO] [stderr]  --> src/euler/longest_collatz_14.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn longest_collatz() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cmp_collatz`
[INFO] [stderr]   --> src/euler/longest_collatz_14.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn cmp_collatz(n: usize, stored_vals: &mut HashMap<usize, usize>) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/euler/triangular_12.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `num_factors`
[INFO] [stderr]   --> src/euler/triangular_12.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn num_factors(n: usize) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_bigints`
[INFO] [stderr]  --> src/utils.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         pub fn $func_name() -> Vec<$num_type> {
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   | 
[INFO] [stderr]  ::: src/hackerrank/modfib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | read_num_vec!(read_bigints, BigInt);
[INFO] [stderr]   | ------------------------------------ in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `modified_fib`
[INFO] [stderr]  --> src/hackerrank/modfib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn modified_fib() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calc_mod_fib`
[INFO] [stderr]   --> src/hackerrank/modfib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn calc_mod_fib(n: usize, mod_fibs: &mut Vec<BigInt>) -> BigInt {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `connected_cell_in_grid`
[INFO] [stderr]  --> src/hackerrank/connected_cell_in_grid.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn connected_cell_in_grid() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `explore`
[INFO] [stderr]   --> src/hackerrank/connected_cell_in_grid.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn explore(m: &mut Vec<Vec<u32>>, r: isize, c: isize) -> u32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `grid_search`
[INFO] [stderr]  --> src/hackerrank/the_grid_search.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn grid_search() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `contains`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn contains(g: &Vec<String>, p: &Vec<String>) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_at`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn match_at(g: &Vec<String>, p: &Vec<String>, r: usize, c: usize) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_matrix`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn read_matrix() -> Vec<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `knapsack`
[INFO] [stderr]  --> src/hackerrank/knapsack.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn knapsack() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_knapsack`
[INFO] [stderr]   --> src/hackerrank/knapsack.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / fn max_knapsack(c: usize, n: usize, sizes: &Vec<usize>, values: &Vec<usize>,
[INFO] [stderr] 22 | |                 memoized: &mut Vec<Vec<Option<usize>>>) -> usize {
[INFO] [stderr] 23 | |     if let Some(v) = memoized[n][c] {
[INFO] [stderr] 24 | |         return v;
[INFO] [stderr] ...  |
[INFO] [stderr] 38 | |     max_val
[INFO] [stderr] 39 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_sum`
[INFO] [stderr]  --> src/interviewbit/max_sum_path_in_binary_tree.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn max_sum() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_path`
[INFO] [stderr]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | / fn max_path(i: usize, par: usize, vals: &Vec<i32>,
[INFO] [stderr] 15 | |             cnxs: &Vec<Vec<usize>>, max_sum: &mut i32)
[INFO] [stderr] 16 | |             -> i32 {
[INFO] [stderr] 17 | |     let mut subsums = Vec::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |     max(best_subsum + vals[i], vals[i])
[INFO] [stderr] 35 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(inclusive_range_syntax)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     io::stdin().read_line(&mut line);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:7:13
[INFO] [stderr]    |
[INFO] [stderr] 7  |             io::stdin().read_line(&mut line);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | read_num_vec!(read_ints, i32);
[INFO] [stderr]    | ------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     io::stdin().read_line(&mut r_str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     io::stdin().read_line(&mut c_str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |         io::stdin().read_line(&mut row);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/utils.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |             io::stdin().read_line(&mut line);
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   | 
[INFO] [stderr]  ::: src/hackerrank/modfib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | read_num_vec!(read_bigints, BigInt);
[INFO] [stderr]   | ------------------------------------ in this macro invocation
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/hackerrank/the_grid_search.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     io::stdin().read_line(&mut t_str);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     io::stdin().read_line(&mut grgc_str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         io::stdin().read_line(&mut row);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_usize_pair`
[INFO] [stderr]   --> src/utils.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn read_usize_pair() -> (usize, usize) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_matrix_u32`
[INFO] [stderr]   --> src/utils.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn read_matrix_u32() -> Vec<Vec<u32>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `UPPER_BOUND`
[INFO] [stderr]  --> src/euler/circular_primes_35.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const UPPER_BOUND: usize = 1000000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `circularprimes`
[INFO] [stderr]  --> src/euler/circular_primes_35.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn circularprimes() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_prime`
[INFO] [stderr]   --> src/euler/circular_primes_35.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn is_prime(n: usize, primes: &Vec<usize>) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `UPPER_BOUND`
[INFO] [stderr]  --> src/euler/longest_collatz_14.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | const UPPER_BOUND: usize = 1000000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_collatz`
[INFO] [stderr]  --> src/euler/longest_collatz_14.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn longest_collatz() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cmp_collatz`
[INFO] [stderr]   --> src/euler/longest_collatz_14.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn cmp_collatz(n: usize, stored_vals: &mut HashMap<usize, usize>) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/euler/triangular_12.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `num_factors`
[INFO] [stderr]   --> src/euler/triangular_12.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn num_factors(n: usize) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_bigints`
[INFO] [stderr]  --> src/utils.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         pub fn $func_name() -> Vec<$num_type> {
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   | 
[INFO] [stderr]  ::: src/hackerrank/modfib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | read_num_vec!(read_bigints, BigInt);
[INFO] [stderr]   | ------------------------------------ in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `modified_fib`
[INFO] [stderr]  --> src/hackerrank/modfib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn modified_fib() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calc_mod_fib`
[INFO] [stderr]   --> src/hackerrank/modfib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn calc_mod_fib(n: usize, mod_fibs: &mut Vec<BigInt>) -> BigInt {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `connected_cell_in_grid`
[INFO] [stderr]  --> src/hackerrank/connected_cell_in_grid.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn connected_cell_in_grid() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `explore`
[INFO] [stderr]   --> src/hackerrank/connected_cell_in_grid.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn explore(m: &mut Vec<Vec<u32>>, r: isize, c: isize) -> u32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `grid_search`
[INFO] [stderr]  --> src/hackerrank/the_grid_search.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn grid_search() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `contains`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn contains(g: &Vec<String>, p: &Vec<String>) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_at`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn match_at(g: &Vec<String>, p: &Vec<String>, r: usize, c: usize) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_matrix`
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn read_matrix() -> Vec<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `knapsack`
[INFO] [stderr]  --> src/hackerrank/knapsack.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn knapsack() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_knapsack`
[INFO] [stderr]   --> src/hackerrank/knapsack.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / fn max_knapsack(c: usize, n: usize, sizes: &Vec<usize>, values: &Vec<usize>,
[INFO] [stderr] 22 | |                 memoized: &mut Vec<Vec<Option<usize>>>) -> usize {
[INFO] [stderr] 23 | |     if let Some(v) = memoized[n][c] {
[INFO] [stderr] 24 | |         return v;
[INFO] [stderr] ...  |
[INFO] [stderr] 38 | |     max_val
[INFO] [stderr] 39 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_sum`
[INFO] [stderr]  --> src/interviewbit/max_sum_path_in_binary_tree.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn max_sum() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_path`
[INFO] [stderr]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | / fn max_path(i: usize, par: usize, vals: &Vec<i32>,
[INFO] [stderr] 15 | |             cnxs: &Vec<Vec<usize>>, max_sum: &mut i32)
[INFO] [stderr] 16 | |             -> i32 {
[INFO] [stderr] 17 | |     let mut subsums = Vec::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |     max(best_subsum + vals[i], vals[i])
[INFO] [stderr] 35 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(inclusive_range_syntax)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     io::stdin().read_line(&mut line);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:7:13
[INFO] [stderr]    |
[INFO] [stderr] 7  |             io::stdin().read_line(&mut line);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 | read_num_vec!(read_ints, i32);
[INFO] [stderr]    | ------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     io::stdin().read_line(&mut r_str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     io::stdin().read_line(&mut c_str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/utils.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |         io::stdin().read_line(&mut row);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/utils.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |             io::stdin().read_line(&mut line);
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   | 
[INFO] [stderr]  ::: src/hackerrank/modfib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | read_num_vec!(read_bigints, BigInt);
[INFO] [stderr]   | ------------------------------------ in this macro invocation
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/hackerrank/the_grid_search.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     io::stdin().read_line(&mut t_str);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     io::stdin().read_line(&mut grgc_str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/hackerrank/the_grid_search.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         io::stdin().read_line(&mut row);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `"docker" "inspect" "8b6799f6596919c9919beca686e9bb39891011806125b0c3c676b8de40e2fc31"`
[INFO] running `"docker" "rm" "-f" "8b6799f6596919c9919beca686e9bb39891011806125b0c3c676b8de40e2fc31"`
[INFO] [stdout] 8b6799f6596919c9919beca686e9bb39891011806125b0c3c676b8de40e2fc31