[INFO] updating cached repository https://github.com/quentm74/exercises-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] testing quentm74/exercises-rust against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquentm74%2Fexercises-rust" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quentm74/exercises-rust on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "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 work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/quentm74/exercises-rust already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] f220ee079f9f24cb145f3608ed5b0967f3e097683ce054ea3611a4f5a200f10a
[INFO] running `"docker" "start" "-a" "f220ee079f9f24cb145f3608ed5b0967f3e097683ce054ea3611a4f5a200f10a"`
[INFO] [stderr]    Compiling 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:7:1
[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:11:1
[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:11:1
[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:25:1
[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: struct is never constructed: `SetMustContainAtLeastThreeValuesError`
[INFO] [stderr]   --> src/EX2_get_third_minimal_value_in_set.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | struct SetMustContainAtLeastThreeValuesError {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_common_subsequence`
[INFO] [stderr]  --> src/EX3_longest_common_subsequence.rs:7:1
[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:38:1
[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:72:1
[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:9:1
[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:14:1
[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:35:1
[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:63:1
[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: struct is never constructed: `IndexOutOfBoundError`
[INFO] [stderr]   --> src/EX4_quicksort.rs:95:1
[INFO] [stderr]    |
[INFO] [stderr] 95 | struct 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `"docker" "inspect" "f220ee079f9f24cb145f3608ed5b0967f3e097683ce054ea3611a4f5a200f10a"`
[INFO] running `"docker" "rm" "-f" "f220ee079f9f24cb145f3608ed5b0967f3e097683ce054ea3611a4f5a200f10a"`
[INFO] [stdout] f220ee079f9f24cb145f3608ed5b0967f3e097683ce054ea3611a4f5a200f10a
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 69d58d277ee9e119ef10d54c81c656ad9c45958490fdd3f1067cf965c8bb8a0f
[INFO] running `"docker" "start" "-a" "69d58d277ee9e119ef10d54c81c656ad9c45958490fdd3f1067cf965c8bb8a0f"`
[INFO] [stderr]    Compiling 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: struct is never constructed: `SetMustContainAtLeastThreeValuesError`
[INFO] [stderr]   --> src/EX2_get_third_minimal_value_in_set.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | struct SetMustContainAtLeastThreeValuesError {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `IndexOutOfBoundError`
[INFO] [stderr]   --> src/EX4_quicksort.rs:95:1
[INFO] [stderr]    |
[INFO] [stderr] 95 | struct 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "69d58d277ee9e119ef10d54c81c656ad9c45958490fdd3f1067cf965c8bb8a0f"`
[INFO] running `"docker" "rm" "-f" "69d58d277ee9e119ef10d54c81c656ad9c45958490fdd3f1067cf965c8bb8a0f"`
[INFO] [stdout] 69d58d277ee9e119ef10d54c81c656ad9c45958490fdd3f1067cf965c8bb8a0f
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] f79dfd5c682547db2783621a32d25dafb7e08272dddf40f417411d52a85f9095
[INFO] running `"docker" "start" "-a" "f79dfd5c682547db2783621a32d25dafb7e08272dddf40f417411d52a85f9095"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_exercises-13cc646a21c76429
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test EX1_regex::tests::test_regex_1 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_2 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_3 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_4 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_5 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_7 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_6 ... ok
[INFO] [stdout] test EX1_regex::tests::test_regex_8 ... ok
[INFO] [stdout] test EX3_longest_common_subsequence::tests::test_increment_array_2 ... ok
[INFO] [stdout] test EX3_longest_common_subsequence::tests::test_increment_array_1 ... ok
[INFO] [stdout] test EX2_get_third_minimal_value_in_set::tests::test_third_minimal_value_1 ... ok
[INFO] [stdout] test EX3_longest_common_subsequence::tests::test_increment_array_3 ... ok
[INFO] [stdout] test EX2_get_third_minimal_value_in_set::tests::test_third_minimal_value_2 ... ok
[INFO] [stdout] test EX3_longest_common_subsequence::tests::test_longest_common_subsequence_2 ... ok
[INFO] [stdout] test EX3_longest_common_subsequence::tests::test_longest_common_subsequence_1 ... ok
[INFO] [stdout] test EX4_quicksort::tests::test_quicksort_2 ... ok
[INFO] [stdout] test EX4_quicksort::tests::test_quicksort_partition_1 ... ok
[INFO] [stdout] test EX4_quicksort::tests::test_quicksort_1 ... ok
[INFO] [stdout] test EX4_quicksort::tests::test_quicksort_partition_2 ... ok
[INFO] [stdout] test EX4_quicksort::tests::test_swap_1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f79dfd5c682547db2783621a32d25dafb7e08272dddf40f417411d52a85f9095"`
[INFO] running `"docker" "rm" "-f" "f79dfd5c682547db2783621a32d25dafb7e08272dddf40f417411d52a85f9095"`
[INFO] [stdout] f79dfd5c682547db2783621a32d25dafb7e08272dddf40f417411d52a85f9095