[INFO] updating cached repository quentm74/exercises-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/quentm74/exercises-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/quentm74/exercises-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/quentm74/exercises-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/quentm74/exercises-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/quentm74/exercises-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/quentm74/exercises-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/quentm74/exercises-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cef3ec520060a35bcb625d2950aa5c49d17d4a74
[INFO] sha for GitHub repo quentm74/exercises-rust: cef3ec520060a35bcb625d2950aa5c49d17d4a74
[INFO] validating manifest of quentm74/exercises-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of quentm74/exercises-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing quentm74/exercises-rust
[INFO] finished frobbing quentm74/exercises-rust
[INFO] frobbed toml for quentm74/exercises-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/quentm74/exercises-rust/Cargo.toml
[INFO] started frobbing quentm74/exercises-rust
[INFO] finished frobbing quentm74/exercises-rust
[INFO] frobbed toml for quentm74/exercises-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/quentm74/exercises-rust/Cargo.toml
[INFO] crate quentm74/exercises-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking quentm74/exercises-rust against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/quentm74/exercises-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] dc0c40946c436349995f50d99717c4ab561af48bb11a0a068ab8a4ccba55e90e
[INFO] running `"docker" "start" "-a" "dc0c40946c436349995f50d99717c4ab561af48bb11a0a068ab8a4ccba55e90e"`
[INFO] [stderr]     Checking rust-exercises v0.1.0 (/opt/crater/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] 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 0.78s
[INFO] running `"docker" "inspect" "dc0c40946c436349995f50d99717c4ab561af48bb11a0a068ab8a4ccba55e90e"`
[INFO] running `"docker" "rm" "-f" "dc0c40946c436349995f50d99717c4ab561af48bb11a0a068ab8a4ccba55e90e"`
[INFO] [stdout] dc0c40946c436349995f50d99717c4ab561af48bb11a0a068ab8a4ccba55e90e