[INFO] cloning repository https://github.com/PavelVavruska/hacker-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PavelVavruska/hacker-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPavelVavruska%2Fhacker-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPavelVavruska%2Fhacker-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dac4ed8541cf90fa2aa6992111a93d6bca1158c7
[INFO] testing PavelVavruska/hacker-code against master#0d162b25edd5bf0dba9a22e83b614f1113e90474 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPavelVavruska%2Fhacker-code" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/PavelVavruska/hacker-code
[INFO] finished tweaking git repo https://github.com/PavelVavruska/hacker-code
[INFO] tweaked toml for git repo https://github.com/PavelVavruska/hacker-code written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PavelVavruska/hacker-code on toolchain 0d162b25edd5bf0dba9a22e83b614f1113e90474
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/PavelVavruska/hacker-code 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" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1da2a70261e76cfac51888ca27ef845ac91b3a805b2dace442f03200ad2880c8
[INFO] running `Command { std: "docker" "start" "-a" "1da2a70261e76cfac51888ca27ef845ac91b3a805b2dace442f03200ad2880c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1da2a70261e76cfac51888ca27ef845ac91b3a805b2dace442f03200ad2880c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1da2a70261e76cfac51888ca27ef845ac91b3a805b2dace442f03200ad2880c8", kill_on_drop: false }`
[INFO] [stdout] 1da2a70261e76cfac51888ca27ef845ac91b3a805b2dace442f03200ad2880c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f0c44ab4a7ed63976849d59a9c4afda893176593d741c5d48d5d8ec22bf7d9c
[INFO] running `Command { std: "docker" "start" "-a" "1f0c44ab4a7ed63976849d59a9c4afda893176593d741c5d48d5d8ec22bf7d9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling hacker-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Cacher_u32` should have an upper camel case name
[INFO] [stdout]  --> src/rust_book/closures_cacher.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Cacher_u32<T: Fn(u32) -> u32> {
[INFO] [stdout]   |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `CacherU32`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/questions/palindrome_linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListNode` is never constructed
[INFO] [stdout]  --> src/questions/palindrome_linked_list.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ListNode {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/questions/palindrome_linked_list.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 12 |     #[inline]
[INFO] [stdout] 13 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_palindrome` is never used
[INFO] [stdout]   --> src/questions/palindrome_linked_list.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 18 |     pub fn is_palindrome(head: Option<Box<ListNode>>) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/questions/palindrome_number.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `is_palindrome`, `is_palindrome_i64_hack`, and `is_palindrome_string_version` are never used
[INFO] [stdout]   --> src/questions/palindrome_number.rs:7:12
[INFO] [stdout]    |
[INFO] [stdout]  3 | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  7 |     pub fn is_palindrome(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn is_palindrome_i64_hack(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn is_palindrome_string_version(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/questions/reverse_linked_list.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListNode` is never constructed
[INFO] [stdout]  --> src/questions/reverse_linked_list.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct ListNode {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/questions/reverse_linked_list.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 11 |     #[inline]
[INFO] [stdout] 12 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `reverse_list` is never used
[INFO] [stdout]   --> src/questions/reverse_linked_list.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 17 |     pub fn reverse_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/questions/roman_to_integer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `roman_to_int` is never used
[INFO] [stdout]  --> src/questions/roman_to_integer.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 8 |     pub fn roman_to_int(s: String) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_number_of_pairs` is never used
[INFO] [stdout]  --> src/questions/socks.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn get_number_of_pairs(_number: i8, color_array: &[i8]) -> i8 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/questions/two_sums.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `two_sum` is never used
[INFO] [stdout]  --> src/questions/two_sums.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 5 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_employee_to_department` is never used
[INFO] [stdout]  --> src/rust_book/collections_hashmap.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn add_employee_to_department(
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_employees_from_department` is never used
[INFO] [stdout]   --> src/rust_book/collections_hashmap.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn get_employees_from_department(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_all_employees_from_company` is never used
[INFO] [stdout]   --> src/rust_book/collections_hashmap.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn get_all_employees_from_company(company: &HashMap<String, Vec<String>>) -> Vec<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_pig_latin` is never used
[INFO] [stdout]  --> src/rust_book/collections_string.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn get_pig_latin(input_str: String) -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_median` is never used
[INFO] [stdout]  --> src/rust_book/collections_vec.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn get_median(int_list: &mut Vec<i32>) -> f32 {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/rust_book/traits.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn largest<T: PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/rust_book/traits.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher_u32` is never constructed
[INFO] [stdout]  --> src/rust_book/closures_cacher.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Cacher_u32<T: Fn(u32) -> u32> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/rust_book/closures_cacher.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<T: Fn(u32) -> u32> Cacher_u32<T> {
[INFO] [stdout]    | ------------------------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(computation: T) -> Cacher_u32<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn value(&mut self, number: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/rust_book/closures_cacher.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Cacher<T: Fn(U) -> U, U: Copy> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/rust_book/closures_cacher.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<T: Fn(U) -> U, U: Copy> Cacher<T, U> {
[INFO] [stdout]    | ----------------------------------------- associated items in this implementation
[INFO] [stdout] 35 |     pub fn new(computation: T) -> Cacher<T, U> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     pub fn value(&mut self, input_value: U) -> U {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CacherHash` is never constructed
[INFO] [stdout]   --> src/rust_book/closures_cacher.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct CacherHash<T: Fn(K) -> V, K: Eq+Hash, V: Copy+Eq+Hash > {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/rust_book/closures_cacher.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T: Fn(K) -> V, K: Clone+Eq+Hash, V: Copy+Eq+Hash> CacherHash<T, K, V> {
[INFO] [stdout]    | -------------------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 62 |     pub fn new(computation: T) -> CacherHash<T, K, V> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn value(&mut self, input_value: K) -> V {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/rust_book/iterators.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Counter {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/rust_book/iterators.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Counter {
[INFO] [stdout]   | ------------ associated function in this implementation
[INFO] [stdout] 6 |     fn new() -> Counter {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "1f0c44ab4a7ed63976849d59a9c4afda893176593d741c5d48d5d8ec22bf7d9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f0c44ab4a7ed63976849d59a9c4afda893176593d741c5d48d5d8ec22bf7d9c", kill_on_drop: false }`
[INFO] [stdout] 1f0c44ab4a7ed63976849d59a9c4afda893176593d741c5d48d5d8ec22bf7d9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59b044275861fca513068685842a8c002bf69ac7a4f0be57165306259f2c0103
[INFO] running `Command { std: "docker" "start" "-a" "59b044275861fca513068685842a8c002bf69ac7a4f0be57165306259f2c0103", kill_on_drop: false }`
[INFO] [stderr]    Compiling hacker-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Cacher_u32` should have an upper camel case name
[INFO] [stdout]  --> src/rust_book/closures_cacher.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Cacher_u32<T: Fn(u32) -> u32> {
[INFO] [stdout]   |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `CacherU32`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/rust_book/closures_cacher.rs:88:27
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let closure = |x| (x + 1);
[INFO] [stdout]    |                           ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 88 -         let closure = |x| (x + 1);
[INFO] [stdout] 88 +         let closure = |x| x + 1 ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/rust_book/closures_cacher.rs:110:27
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let closure = |x| (x + 1);
[INFO] [stdout]     |                           ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 110 -         let closure = |x| (x + 1);
[INFO] [stdout] 110 +         let closure = |x| x + 1 ;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/rust_book/closures_cacher.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |             for i in 1..1000 {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `is_palindrome_i64_hack` and `is_palindrome_string_version` are never used
[INFO] [stdout]   --> src/questions/palindrome_number.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout]  3 | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn is_palindrome_i64_hack(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn is_palindrome_string_version(x: i32) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_employees_from_department` is never used
[INFO] [stdout]   --> src/rust_book/collections_hashmap.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn get_employees_from_department(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/rust_book/traits.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> src/rust_book/ref_weak_strong.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     struct Node {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 5 |         value: i32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 6 |         parent: RefCell<Weak<Node>>,
[INFO] [stdout] 7 |         children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "59b044275861fca513068685842a8c002bf69ac7a4f0be57165306259f2c0103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59b044275861fca513068685842a8c002bf69ac7a4f0be57165306259f2c0103", kill_on_drop: false }`
[INFO] [stdout] 59b044275861fca513068685842a8c002bf69ac7a4f0be57165306259f2c0103
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a90e5d98ea3018a4f2084d970422ad89aa635b9b7225c5d334704c1f731a73bd
[INFO] running `Command { std: "docker" "start" "-a" "a90e5d98ea3018a4f2084d970422ad89aa635b9b7225c5d334704c1f731a73bd", kill_on_drop: false }`
[INFO] [stderr] warning: type `Cacher_u32` should have an upper camel case name
[INFO] [stderr]  --> src/rust_book/closures_cacher.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Cacher_u32<T: Fn(u32) -> u32> {
[INFO] [stderr]   |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `CacherU32`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]   --> src/rust_book/closures_cacher.rs:88:27
[INFO] [stderr]    |
[INFO] [stderr] 88 |         let closure = |x| (x + 1);
[INFO] [stderr]    |                           ^     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 88 -         let closure = |x| (x + 1);
[INFO] [stderr] 88 +         let closure = |x| x + 1 ;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]    --> src/rust_book/closures_cacher.rs:110:27
[INFO] [stderr]     |
[INFO] [stderr] 110 |         let closure = |x| (x + 1);
[INFO] [stderr]     |                           ^     ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 110 -         let closure = |x| (x + 1);
[INFO] [stderr] 110 +         let closure = |x| x + 1 ;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/rust_book/closures_cacher.rs:178:17
[INFO] [stderr]     |
[INFO] [stderr] 178 |             for i in 1..1000 {
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated functions `is_palindrome_i64_hack` and `is_palindrome_string_version` are never used
[INFO] [stderr]   --> src/questions/palindrome_number.rs:46:12
[INFO] [stderr]    |
[INFO] [stderr]  3 | impl Solution {
[INFO] [stderr]    | ------------- associated functions in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 46 |     pub fn is_palindrome_i64_hack(x: i32) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 78 |     pub fn is_palindrome_string_version(x: i32) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_employees_from_department` is never used
[INFO] [stderr]   --> src/rust_book/collections_hashmap.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn get_employees_from_department(
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]   --> src/rust_book/traits.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn main() {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `value` and `children` are never read
[INFO] [stderr]  --> src/rust_book/ref_weak_strong.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     struct Node {
[INFO] [stderr]   |            ---- fields in this struct
[INFO] [stderr] 5 |         value: i32,
[INFO] [stderr]   |         ^^^^^
[INFO] [stderr] 6 |         parent: RefCell<Weak<Node>>,
[INFO] [stderr] 7 |         children: RefCell<Vec<Rc<Node>>>,
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `hacker-code` (bin "hacker-code" test) generated 8 warnings (run `cargo fix --bin "hacker-code" -p hacker-code --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hacker_code-b0001ecdc786693b)
[INFO] [stdout] 
[INFO] [stdout] running 29 tests
[INFO] [stdout] test questions::palindrome_linked_list::tests::test_example_1 ... ok
[INFO] [stdout] test questions::palindrome_number::tests::test_example_1 ... ok
[INFO] [stdout] test questions::palindrome_linked_list::tests::test_example_3 ... ok
[INFO] [stdout] test questions::palindrome_number::tests::test_example_2 ... ok
[INFO] [stdout] test questions::palindrome_number::tests::test_example_3 ... ok
[INFO] [stdout] test questions::palindrome_number::tests::test_example_4 ... ok
[INFO] [stdout] test questions::reverse_linked_list::tests::test_example_1 ... ok
[INFO] [stdout] test questions::roman_to_integer::tests::test_example_1 ... ok
[INFO] [stdout] test questions::roman_to_integer::tests::test_example_2 ... ok
[INFO] [stdout] test questions::roman_to_integer::tests::test_example_3 ... ok
[INFO] [stdout] test questions::roman_to_integer::tests::test_example_4 ... ok
[INFO] [stdout] test questions::socks::tests::test_number_of_pairs_1 ... ok
[INFO] [stdout] test questions::socks::tests::test_number_of_pairs_2 ... ok
[INFO] [stdout] test questions::socks::tests::test_number_of_pairs_3 ... ok
[INFO] [stdout] test questions::two_sums::tests::test_two_sum_1 ... ok
[INFO] [stdout] test rust_book::closures_cacher::tests::test_generic_usize ... ok
[INFO] [stdout] test rust_book::closures_cacher::tests::test_generic_hashmap_usize_string_slice ... ok
[INFO] [stdout] test rust_book::closures_cacher::tests::test_u32 ... ok
[INFO] [stdout] test rust_book::collections_hashmap::tests::test_get_consonant ... ok
[INFO] [stdout] test rust_book::collections_vec::tests::test_get_median_even ... ok
[INFO] [stdout] test rust_book::collections_string::tests::test_get_vowel ... ok
[INFO] [stdout] test rust_book::iterators::tests::calling_next_directly ... ok
[INFO] [stdout] test rust_book::traits::tests::test_main ... ok
[INFO] [stdout] test rust_book::closures_cacher::tests::test_generic_hashmap_usize ... ok
[INFO] [stdout] test rust_book::collections_string::tests::test_get_consonant ... ok
[INFO] [stdout] test rust_book::ref_weak_strong::tests::test_scopes ... ok
[INFO] [stdout] test rust_book::collections_vec::tests::test_get_median_odd ... ok
[INFO] [stdout] test rust_book::closures_cacher::tests::test_generic_i32 ... ok
[INFO] [stdout] test questions::palindrome_linked_list::tests::test_example_2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 29 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a90e5d98ea3018a4f2084d970422ad89aa635b9b7225c5d334704c1f731a73bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a90e5d98ea3018a4f2084d970422ad89aa635b9b7225c5d334704c1f731a73bd", kill_on_drop: false }`
[INFO] [stdout] a90e5d98ea3018a4f2084d970422ad89aa635b9b7225c5d334704c1f731a73bd
