[INFO] crate hask-replace 0.6.0 is already in cache
[INFO] extracting crate hask-replace 0.6.0 into work/ex/clippy-test-run/sources/stable/reg/hask-replace/0.6.0
[INFO] extracting crate hask-replace 0.6.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/hask-replace/0.6.0
[INFO] validating manifest of hask-replace-0.6.0 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hask-replace-0.6.0 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing hask-replace-0.6.0
[INFO] finished frobbing hask-replace-0.6.0
[INFO] frobbed toml for hask-replace-0.6.0 written to work/ex/clippy-test-run/sources/stable/reg/hask-replace/0.6.0/Cargo.toml
[INFO] started frobbing hask-replace-0.6.0
[INFO] finished frobbing hask-replace-0.6.0
[INFO] frobbed toml for hask-replace-0.6.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/hask-replace/0.6.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting hask-replace-0.6.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/hask-replace/0.6.0:/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 597c2f1ae60b840c848f87e4cd7add7a695ce471300f738834eea08faf7f414d
[INFO] running `"docker" "start" "-a" "597c2f1ae60b840c848f87e4cd7add7a695ce471300f738834eea08faf7f414d"`
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking hask-replace v0.6.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/main.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             copy: copy,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `copy`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |             copy: copy,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `copy`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/main.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             copy: copy,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `copy`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |             copy: copy,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `copy`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:171:3
[INFO] [stderr]     |
[INFO] [stderr] 171 | ) -> () {
[INFO] [stderr]     |   ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:203:3
[INFO] [stderr]     |
[INFO] [stderr] 203 | ) -> () {
[INFO] [stderr]     |   ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:234:54
[INFO] [stderr]     |
[INFO] [stderr] 234 | fn write_file<P: AsRef<Path> + Debug>(p: P, s: &str) -> () {
[INFO] [stderr]     |                                                      ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:288:75
[INFO] [stderr]     |
[INFO] [stderr] 288 | fn replace_all(config: &ProjectOwned, old_module: &str, new_module: &str) -> () {
[INFO] [stderr]     |                                                                           ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: Creating a reference that is immediately dereferenced.
[INFO] [stderr]    --> src/main.rs:405:38
[INFO] [stderr]     |
[INFO] [stderr] 405 |         let mut file_name: PathBuf = (&config).dir.to_owned();
[INFO] [stderr]     |                                      ^^^^^^^^^ help: try this: `config.dir`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ref_in_deref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ref_in_deref
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:432:29
[INFO] [stderr]     |
[INFO] [stderr] 432 | fn git_stash(src_dir: &str) -> () {
[INFO] [stderr]     |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:171:3
[INFO] [stderr]     |
[INFO] [stderr] 171 | ) -> () {
[INFO] [stderr]     |   ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:203:3
[INFO] [stderr]     |
[INFO] [stderr] 203 | ) -> () {
[INFO] [stderr]     |   ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:234:54
[INFO] [stderr]     |
[INFO] [stderr] 234 | fn write_file<P: AsRef<Path> + Debug>(p: P, s: &str) -> () {
[INFO] [stderr]     |                                                      ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:288:75
[INFO] [stderr]     |
[INFO] [stderr] 288 | fn replace_all(config: &ProjectOwned, old_module: &str, new_module: &str) -> () {
[INFO] [stderr]     |                                                                           ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: Creating a reference that is immediately dereferenced.
[INFO] [stderr]    --> src/main.rs:405:38
[INFO] [stderr]     |
[INFO] [stderr] 405 |         let mut file_name: PathBuf = (&config).dir.to_owned();
[INFO] [stderr]     |                                      ^^^^^^^^^ help: try this: `config.dir`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ref_in_deref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ref_in_deref
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/main.rs:432:29
[INFO] [stderr]     |
[INFO] [stderr] 432 | fn git_stash(src_dir: &str) -> () {
[INFO] [stderr]     |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/main.rs:56:34
[INFO] [stderr]    |
[INFO] [stderr] 56 |                   (find.into_iter().fold(
[INFO] [stderr]    |  __________________________________^
[INFO] [stderr] 57 | |                     false,
[INFO] [stderr] 58 | |                     |bool_accumulator, string_ext| {
[INFO] [stderr] 59 | |                         bool_accumulator || p_str.ends_with(string_ext)
[INFO] [stderr] 60 | |                     },
[INFO] [stderr]    | |______________________^ help: try: `.any(|string_ext| p_str.ends_with(string_ext))`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/main.rs:56:23
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 (find.into_iter().fold(
[INFO] [stderr]    |                       ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:135:38
[INFO] [stderr]     |
[INFO] [stderr] 135 |                   extension.into_iter().fold(
[INFO] [stderr]     |  ______________________________________^
[INFO] [stderr] 136 | |                     false,
[INFO] [stderr] 137 | |                     |bool_accumulator, string_ext| {
[INFO] [stderr] 138 | |                         bool_accumulator || p_str.ends_with(string_ext)
[INFO] [stderr] 139 | |                     },
[INFO] [stderr]     | |______________________^ help: try: `.any(|string_ext| p_str.ends_with(string_ext))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:135:27
[INFO] [stderr]     |
[INFO] [stderr] 135 |                 extension.into_iter().fold(
[INFO] [stderr]     |                           ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:150:74
[INFO] [stderr]     |
[INFO] [stderr] 150 |     let mut replacements_vec: Vec<String> = Vec::with_capacity(extension.into_iter().count());
[INFO] [stderr]     |                                                                          ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:154:40
[INFO] [stderr]     |
[INFO] [stderr] 154 |     let mut extension_iter = extension.into_iter();
[INFO] [stderr]     |                                        ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:185:28
[INFO] [stderr]     |
[INFO] [stderr] 185 |     let num = if extension.into_iter().next().unwrap() == ".idr" {
[INFO] [stderr]     |                            ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:221:32
[INFO] [stderr]     |
[INFO] [stderr] 221 |         let num = if extension.into_iter().next().unwrap() == ".idr" {
[INFO] [stderr]     |                                ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/main.rs:387:31
[INFO] [stderr]     |
[INFO] [stderr] 387 |       new_module_path.push_str(&module_to_file_names(new_module, module_ext)
[INFO] [stderr]     |  _______________________________^
[INFO] [stderr] 388 | |         .into_iter()
[INFO] [stderr] 389 | |         .filter(|p| p.ends_with(&extn))
[INFO] [stderr] 390 | |         .next()
[INFO] [stderr]     | |_______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]     = note: replace `filter(|p| p.ends_with(&extn)).next()` with `find(|p| p.ends_with(&extn))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/main.rs:56:34
[INFO] [stderr]    |
[INFO] [stderr] 56 |                   (find.into_iter().fold(
[INFO] [stderr]    |  __________________________________^
[INFO] [stderr] 57 | |                     false,
[INFO] [stderr] 58 | |                     |bool_accumulator, string_ext| {
[INFO] [stderr] 59 | |                         bool_accumulator || p_str.ends_with(string_ext)
[INFO] [stderr] 60 | |                     },
[INFO] [stderr]    | |______________________^ help: try: `.any(|string_ext| p_str.ends_with(string_ext))`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/main.rs:56:23
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 (find.into_iter().fold(
[INFO] [stderr]    |                       ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:135:38
[INFO] [stderr]     |
[INFO] [stderr] 135 |                   extension.into_iter().fold(
[INFO] [stderr]     |  ______________________________________^
[INFO] [stderr] 136 | |                     false,
[INFO] [stderr] 137 | |                     |bool_accumulator, string_ext| {
[INFO] [stderr] 138 | |                         bool_accumulator || p_str.ends_with(string_ext)
[INFO] [stderr] 139 | |                     },
[INFO] [stderr]     | |______________________^ help: try: `.any(|string_ext| p_str.ends_with(string_ext))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:135:27
[INFO] [stderr]     |
[INFO] [stderr] 135 |                 extension.into_iter().fold(
[INFO] [stderr]     |                           ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:150:74
[INFO] [stderr]     |
[INFO] [stderr] 150 |     let mut replacements_vec: Vec<String> = Vec::with_capacity(extension.into_iter().count());
[INFO] [stderr]     |                                                                          ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:154:40
[INFO] [stderr]     |
[INFO] [stderr] 154 |     let mut extension_iter = extension.into_iter();
[INFO] [stderr]     |                                        ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:185:28
[INFO] [stderr]     |
[INFO] [stderr] 185 |     let num = if extension.into_iter().next().unwrap() == ".idr" {
[INFO] [stderr]     |                            ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/main.rs:221:32
[INFO] [stderr]     |
[INFO] [stderr] 221 |         let num = if extension.into_iter().next().unwrap() == ".idr" {
[INFO] [stderr]     |                                ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/main.rs:387:31
[INFO] [stderr]     |
[INFO] [stderr] 387 |       new_module_path.push_str(&module_to_file_names(new_module, module_ext)
[INFO] [stderr]     |  _______________________________^
[INFO] [stderr] 388 | |         .into_iter()
[INFO] [stderr] 389 | |         .filter(|p| p.ends_with(&extn))
[INFO] [stderr] 390 | |         .next()
[INFO] [stderr]     | |_______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]     = note: replace `filter(|p| p.ends_with(&extn)).next()` with `find(|p| p.ends_with(&extn))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.15s
[INFO] running `"docker" "inspect" "597c2f1ae60b840c848f87e4cd7add7a695ce471300f738834eea08faf7f414d"`
[INFO] running `"docker" "rm" "-f" "597c2f1ae60b840c848f87e4cd7add7a695ce471300f738834eea08faf7f414d"`
[INFO] [stdout] 597c2f1ae60b840c848f87e4cd7add7a695ce471300f738834eea08faf7f414d