[INFO] cloning repository https://github.com/robert-at-pretension-io/Rusty_ML
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robert-at-pretension-io/Rusty_ML" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobert-at-pretension-io%2FRusty_ML"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobert-at-pretension-io%2FRusty_ML'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b8b1af60d71e9edce0c0ce4aa757f24bf5e6ca7
[INFO] checking robert-at-pretension-io/Rusty_ML against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobert-at-pretension-io%2FRusty_ML" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robert-at-pretension-io/Rusty_ML 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/robert-at-pretension-io/Rusty_ML
[INFO] finished tweaking git repo https://github.com/robert-at-pretension-io/Rusty_ML
[INFO] tweaked toml for git repo https://github.com/robert-at-pretension-io/Rusty_ML written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/robert-at-pretension-io/Rusty_ML already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] efe244b68bb3ef96677aa08949797fdbe57f33443f48383239c660429e7d02e7
[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" "efe244b68bb3ef96677aa08949797fdbe57f33443f48383239c660429e7d02e7"`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking serde v0.7.15
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking bincode v0.5.9
[INFO] [stderr]     Checking load_data v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:187:13
[INFO] [stderr]     |
[INFO] [stderr] 187 |             try!(fs::create_dir(n_st.to_owned()).map_err(|e| e.to_string()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:192:13
[INFO] [stderr]     |
[INFO] [stderr] 192 |             try!(fs::create_dir(n_st.to_owned()).map_err(|e| e.to_string()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:446:9
[INFO] [stderr]     |
[INFO] [stderr] 446 |         try!(write!(f,
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:704:24
[INFO] [stderr]     |
[INFO] [stderr] 704 |         let mut file = try!(File::create(path));
[INFO] [stderr]     |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:711:24
[INFO] [stderr]     |
[INFO] [stderr] 711 |         let mut file = try!(File::open(path));
[INFO] [stderr]     |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:230:20
[INFO] [stderr]     |
[INFO] [stderr] 230 |     let mut v: Vec<(String)> = Vec::new();
[INFO] [stderr]     |                    ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:162:61
[INFO] [stderr]     |
[INFO] [stderr] 162 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:168:61
[INFO] [stderr]     |
[INFO] [stderr] 168 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:206:61
[INFO] [stderr]     |
[INFO] [stderr] 206 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:213:61
[INFO] [stderr]     |
[INFO] [stderr] 213 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:283:61
[INFO] [stderr]     |
[INFO] [stderr] 283 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:289:61
[INFO] [stderr]     |
[INFO] [stderr] 289 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:187:13
[INFO] [stderr]     |
[INFO] [stderr] 187 |             try!(fs::create_dir(n_st.to_owned()).map_err(|e| e.to_string()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:192:13
[INFO] [stderr]     |
[INFO] [stderr] 192 |             try!(fs::create_dir(n_st.to_owned()).map_err(|e| e.to_string()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:446:9
[INFO] [stderr]     |
[INFO] [stderr] 446 |         try!(write!(f,
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:704:24
[INFO] [stderr]     |
[INFO] [stderr] 704 |         let mut file = try!(File::create(path));
[INFO] [stderr]     |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/main.rs:711:24
[INFO] [stderr]     |
[INFO] [stderr] 711 |         let mut file = try!(File::open(path));
[INFO] [stderr]     |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/main.rs:230:20
[INFO] [stderr]     |
[INFO] [stderr] 230 |     let mut v: Vec<(String)> = Vec::new();
[INFO] [stderr]     |                    ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:162:61
[INFO] [stderr]     |
[INFO] [stderr] 162 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:168:61
[INFO] [stderr]     |
[INFO] [stderr] 168 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:206:61
[INFO] [stderr]     |
[INFO] [stderr] 206 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:213:61
[INFO] [stderr]     |
[INFO] [stderr] 213 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:283:61
[INFO] [stderr]     |
[INFO] [stderr] 283 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:289:61
[INFO] [stderr]     |
[INFO] [stderr] 289 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `project_name`
[INFO] [stderr]    --> src/main.rs:481:13
[INFO] [stderr]     |
[INFO] [stderr] 481 |         let mut project_name = String::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_project_name`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:481:13
[INFO] [stderr]     |
[INFO] [stderr] 481 |         let mut project_name = String::new();
[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: `string_please`
[INFO] [stderr]   --> src/main.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn string_please() -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clear`
[INFO] [stderr]   --> src/main.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn clear() {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `word_match`
[INFO] [stderr]   --> src/main.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn word_match(word: &str, to_do: &str) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_files`
[INFO] [stderr]   --> src/main.rs:65:4
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn count_files(folder: &str) -> Option<u16> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_choice`
[INFO] [stderr]    --> src/main.rs:132:4
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn make_choice(vs: &Vec<String>, explanation: &str) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_empty_file`
[INFO] [stderr]    --> src/main.rs:155:4
[INFO] [stderr]     |
[INFO] [stderr] 155 | fn is_empty_file(file: &str) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_folder`
[INFO] [stderr]    --> src/main.rs:182:4
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn make_folder(name: &str, optional_folder_location: Option<&str>) -> Result<String, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_first_line_of_file`
[INFO] [stderr]    --> src/main.rs:198:4
[INFO] [stderr]     |
[INFO] [stderr] 198 | fn print_first_line_of_file(file: &str) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collect_files`
[INFO] [stderr]    --> src/main.rs:229:4
[INFO] [stderr]     |
[INFO] [stderr] 229 | fn collect_files(folder: &str) -> Vec<String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_exists`
[INFO] [stderr]    --> src/main.rs:255:4
[INFO] [stderr]     |
[INFO] [stderr] 255 | fn file_exists(file_name: &str) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `choose_another_file`
[INFO] [stderr]    --> src/main.rs:259:4
[INFO] [stderr]     |
[INFO] [stderr] 259 | fn choose_another_file() -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_to_string`
[INFO] [stderr]    --> src/main.rs:271:4
[INFO] [stderr]     |
[INFO] [stderr] 271 | fn file_to_string(file: &str) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_file_to_columns`
[INFO] [stderr]    --> src/main.rs:294:4
[INFO] [stderr]     |
[INFO] [stderr] 294 | fn split_file_to_columns(file: &str, delimiter: &str) -> Vec<Vec<String>> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_over`
[INFO] [stderr]    --> src/main.rs:326:4
[INFO] [stderr]     |
[INFO] [stderr] 326 | fn split_over<'a, 'b>(line: &'a str, delimiter: &'b str) -> Vec<&'a str> {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:342:5
[INFO] [stderr]     |
[INFO] [stderr] 342 |     fn new(data: Vec<String>, name: &str) -> Column {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `initialize`
[INFO] [stderr]    --> src/main.rs:468:5
[INFO] [stderr]     |
[INFO] [stderr] 468 |     fn initialize() -> Data {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `save`
[INFO] [stderr]    --> src/main.rs:702:5
[INFO] [stderr]     |
[INFO] [stderr] 702 |     fn save(&self, path: &str) -> Result<(), std::io::Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `show`
[INFO] [stderr]    --> src/main.rs:718:5
[INFO] [stderr]     |
[INFO] [stderr] 718 |     fn show(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:713:9
[INFO] [stderr]     |
[INFO] [stderr] 713 |         file.read_to_end(&mut data);
[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: 33 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `project_name`
[INFO] [stderr]    --> src/main.rs:481:13
[INFO] [stderr]     |
[INFO] [stderr] 481 |         let mut project_name = String::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_project_name`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:481:13
[INFO] [stderr]     |
[INFO] [stderr] 481 |         let mut project_name = String::new();
[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: `string_please`
[INFO] [stderr]   --> src/main.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn string_please() -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clear`
[INFO] [stderr]   --> src/main.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn clear() {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `word_match`
[INFO] [stderr]   --> src/main.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn word_match(word: &str, to_do: &str) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_files`
[INFO] [stderr]   --> src/main.rs:65:4
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn count_files(folder: &str) -> Option<u16> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_choice`
[INFO] [stderr]    --> src/main.rs:132:4
[INFO] [stderr]     |
[INFO] [stderr] 132 | fn make_choice(vs: &Vec<String>, explanation: &str) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_empty_file`
[INFO] [stderr]    --> src/main.rs:155:4
[INFO] [stderr]     |
[INFO] [stderr] 155 | fn is_empty_file(file: &str) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_folder`
[INFO] [stderr]    --> src/main.rs:182:4
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn make_folder(name: &str, optional_folder_location: Option<&str>) -> Result<String, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_first_line_of_file`
[INFO] [stderr]    --> src/main.rs:198:4
[INFO] [stderr]     |
[INFO] [stderr] 198 | fn print_first_line_of_file(file: &str) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collect_files`
[INFO] [stderr]    --> src/main.rs:229:4
[INFO] [stderr]     |
[INFO] [stderr] 229 | fn collect_files(folder: &str) -> Vec<String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_exists`
[INFO] [stderr]    --> src/main.rs:255:4
[INFO] [stderr]     |
[INFO] [stderr] 255 | fn file_exists(file_name: &str) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `choose_another_file`
[INFO] [stderr]    --> src/main.rs:259:4
[INFO] [stderr]     |
[INFO] [stderr] 259 | fn choose_another_file() -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `file_to_string`
[INFO] [stderr]    --> src/main.rs:271:4
[INFO] [stderr]     |
[INFO] [stderr] 271 | fn file_to_string(file: &str) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_file_to_columns`
[INFO] [stderr]    --> src/main.rs:294:4
[INFO] [stderr]     |
[INFO] [stderr] 294 | fn split_file_to_columns(file: &str, delimiter: &str) -> Vec<Vec<String>> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_over`
[INFO] [stderr]    --> src/main.rs:326:4
[INFO] [stderr]     |
[INFO] [stderr] 326 | fn split_over<'a, 'b>(line: &'a str, delimiter: &'b str) -> Vec<&'a str> {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:342:5
[INFO] [stderr]     |
[INFO] [stderr] 342 |     fn new(data: Vec<String>, name: &str) -> Column {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `initialize`
[INFO] [stderr]    --> src/main.rs:468:5
[INFO] [stderr]     |
[INFO] [stderr] 468 |     fn initialize() -> Data {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `save`
[INFO] [stderr]    --> src/main.rs:702:5
[INFO] [stderr]     |
[INFO] [stderr] 702 |     fn save(&self, path: &str) -> Result<(), std::io::Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `show`
[INFO] [stderr]    --> src/main.rs:718:5
[INFO] [stderr]     |
[INFO] [stderr] 718 |     fn show(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:713:9
[INFO] [stderr]     |
[INFO] [stderr] 713 |         file.read_to_end(&mut data);
[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: 33 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.10s
[INFO] running `"docker" "inspect" "efe244b68bb3ef96677aa08949797fdbe57f33443f48383239c660429e7d02e7"`
[INFO] running `"docker" "rm" "-f" "efe244b68bb3ef96677aa08949797fdbe57f33443f48383239c660429e7d02e7"`
[INFO] [stdout] efe244b68bb3ef96677aa08949797fdbe57f33443f48383239c660429e7d02e7