[INFO] updating cached repository https://github.com/quentm74/exercises-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cef3ec520060a35bcb625d2950aa5c49d17d4a74
[INFO] checking quentm74/exercises-rust against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquentm74%2Fexercises-rust" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quentm74/exercises-rust on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/quentm74/exercises-rust
[INFO] finished tweaking git repo https://github.com/quentm74/exercises-rust
[INFO] tweaked toml for git repo https://github.com/quentm74/exercises-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/quentm74/exercises-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 43cc1b61e43afdc162790af2827f04569eca7c8c034c559465804274453324c3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "43cc1b61e43afdc162790af2827f04569eca7c8c034c559465804274453324c3"`
[INFO] [stderr]     Checking rust-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/EX3_longest_common_subsequence.rs:60:22
[INFO] [stderr]    |
[INFO] [stderr] 60 |                 Some(mut v) => {
[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: `regex`
[INFO] [stderr]  --> src/EX1_regex.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn regex(string: &str, pattern: &str) -> Result<bool, ()> {
[INFO] [stderr]   |    ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_regex`
[INFO] [stderr]   --> src/EX1_regex.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn check_regex(string: &Vec<char>, pattern: &Vec<char>, string_index: usize, pattern_index: usize) -> Result<bool, ()> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_third_minimal_value`
[INFO] [stderr]   --> src/EX2_get_third_minimal_value_in_set.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn get_third_minimal_value(set: HashSet<i32>) -> Result<i32, GetThirdMinimalValueErrors> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `insert_minimal_value`
[INFO] [stderr]   --> src/EX2_get_third_minimal_value_in_set.rs:25:4
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn insert_minimal_value(minimal_values: &mut Vec<i32>, value: i32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SetMustContainAtLeastThreeValuesError`
[INFO] [stderr]   --> src/EX2_get_third_minimal_value_in_set.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     SetMustContainAtLeastThreeValuesError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_common_subsequence`
[INFO] [stderr]  --> src/EX3_longest_common_subsequence.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn longest_common_subsequence(s1: String, s2: String) -> Result<String, LongestCommonSubsequenceErrors> {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `increment_array`
[INFO] [stderr]   --> src/EX3_longest_common_subsequence.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn increment_array(array: &Vec<usize>, max_index: usize) -> Option<Vec<usize>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `search_for_subsequence`
[INFO] [stderr]   --> src/EX3_longest_common_subsequence.rs:72:4
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn search_for_subsequence(string: &Vec<char>, subsequence: &Vec<char>) -> Result<bool, LongestCommonSubsequenceErrors> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quicksort`
[INFO] [stderr]  --> src/EX4_quicksort.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn quicksort(array: &mut Vec<i32>) -> Result<(), QuicksortErrors> {
[INFO] [stderr]   |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quicksort_r`
[INFO] [stderr]   --> src/EX4_quicksort.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn quicksort_r(array: &mut Vec<i32>, min: usize, max: usize) -> Result<(), QuicksortErrors> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quicksort_partition`
[INFO] [stderr]   --> src/EX4_quicksort.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn quicksort_partition(array: &mut Vec<i32>, min: usize, max: usize) -> Result<Option<usize>, QuicksortErrors> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `swap`
[INFO] [stderr]   --> src/EX4_quicksort.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn swap(array: &mut Vec<i32>, i: usize, j: usize) -> Result<(), QuicksortErrors> {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IndexOutOfBoundError`
[INFO] [stderr]   --> src/EX4_quicksort.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     IndexOutOfBoundError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX1_regex` should have a snake case name
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | mod EX1_regex;
[INFO] [stderr]   |     ^^^^^^^^^ help: convert the identifier to snake case: `ex1_regex`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX2_get_third_minimal_value_in_set` should have a snake case name
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | mod EX2_get_third_minimal_value_in_set;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `ex2_get_third_minimal_value_in_set`
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX3_longest_common_subsequence` should have a snake case name
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | mod EX3_longest_common_subsequence;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `ex3_longest_common_subsequence`
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX4_quicksort` should have a snake case name
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | mod EX4_quicksort;
[INFO] [stderr]   |     ^^^^^^^^^^^^^ help: convert the identifier to snake case: `ex4_quicksort`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/EX3_longest_common_subsequence.rs:60:22
[INFO] [stderr]    |
[INFO] [stderr] 60 |                 Some(mut v) => {
[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: module `EX1_regex` should have a snake case name
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | mod EX1_regex;
[INFO] [stderr]   |     ^^^^^^^^^ help: convert the identifier to snake case: `ex1_regex`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX2_get_third_minimal_value_in_set` should have a snake case name
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | mod EX2_get_third_minimal_value_in_set;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `ex2_get_third_minimal_value_in_set`
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX3_longest_common_subsequence` should have a snake case name
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | mod EX3_longest_common_subsequence;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `ex3_longest_common_subsequence`
[INFO] [stderr] 
[INFO] [stderr] warning: module `EX4_quicksort` should have a snake case name
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | mod EX4_quicksort;
[INFO] [stderr]   |     ^^^^^^^^^^^^^ help: convert the identifier to snake case: `ex4_quicksort`
[INFO] [stderr] 
[INFO] [stderr] warning: 18 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "43cc1b61e43afdc162790af2827f04569eca7c8c034c559465804274453324c3"`
[INFO] running `"docker" "rm" "-f" "43cc1b61e43afdc162790af2827f04569eca7c8c034c559465804274453324c3"`
[INFO] [stdout] 43cc1b61e43afdc162790af2827f04569eca7c8c034c559465804274453324c3