[INFO] crate iron-pack 0.3.0 is already in cache
[INFO] extracting crate iron-pack 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/iron-pack/0.3.0
[INFO] extracting crate iron-pack 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/iron-pack/0.3.0
[INFO] validating manifest of iron-pack-0.3.0 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 iron-pack-0.3.0 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 iron-pack-0.3.0
[INFO] finished frobbing iron-pack-0.3.0
[INFO] frobbed toml for iron-pack-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/iron-pack/0.3.0/Cargo.toml
[INFO] started frobbing iron-pack-0.3.0
[INFO] finished frobbing iron-pack-0.3.0
[INFO] frobbed toml for iron-pack-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/iron-pack/0.3.0/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 iron-pack-0.3.0 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/iron-pack/0.3.0:/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] e894d38c6cf239862599af0bd5e1f7452244c256e2d5938e94de811ded2c1d48
[INFO] running `"docker" "start" "-a" "e894d38c6cf239862599af0bd5e1f7452244c256e2d5938e94de811ded2c1d48"`
[INFO] [stderr]     Checking alloc-no-stdlib v1.2.0
[INFO] [stderr]     Checking iron-test v0.6.0
[INFO] [stderr]     Checking brotli-decompressor v1.2.1
[INFO] [stderr]     Checking brotli v1.2.0
[INFO] [stderr]     Checking iron-pack v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:85:5
[INFO] [stderr]     |
[INFO] [stderr] 85  | /     return match (res.headers.get::<iron::headers::ContentEncoding>(), res.headers.get::<ContentLength>(), req.headers.get::<AcceptEncoding>()) {
[INFO] [stderr] 86  | |         (None, Some(content_length), Some(&AcceptEncoding(ref quality_items))) => {
[INFO] [stderr] 87  | |             if (content_length as &u64) < &DEFAULT_MIN_BYTES_FOR_COMPRESSION {
[INFO] [stderr] 88  | |                 return None;
[INFO] [stderr] ...   |
[INFO] [stderr] 109 | |         _ => None
[INFO] [stderr] 110 | |     };
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 85  |     match (res.headers.get::<iron::headers::ContentEncoding>(), res.headers.get::<ContentLength>(), req.headers.get::<AcceptEncoding>()) {
[INFO] [stderr] 86  |         (None, Some(content_length), Some(&AcceptEncoding(ref quality_items))) => {
[INFO] [stderr] 87  |             if (content_length as &u64) < &DEFAULT_MIN_BYTES_FOR_COMPRESSION {
[INFO] [stderr] 88  |                 return None;
[INFO] [stderr] 89  |             }
[INFO] [stderr] 90  | 
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | /     match encoding {
[INFO] [stderr] 62 | |         &CompressionEncoding::Brotli => *header == Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 63 | |         &CompressionEncoding::Deflate => *header == Encoding::Deflate,
[INFO] [stderr] 64 | |         &CompressionEncoding::Gzip => *header == Encoding::Gzip || *header == Encoding::EncodingExt(String::from("*")),
[INFO] [stderr] 65 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 61 |     match *encoding {
[INFO] [stderr] 62 |         CompressionEncoding::Brotli => *header == Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 63 |         CompressionEncoding::Deflate => *header == Encoding::Deflate,
[INFO] [stderr] 64 |         CompressionEncoding::Gzip => *header == Encoding::Gzip || *header == Encoding::EncodingExt(String::from("*")),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     match encoding {
[INFO] [stderr] 70 | |         &CompressionEncoding::Brotli => Box::new(BrotliBody(wrapped_body)),
[INFO] [stderr] 71 | |         &CompressionEncoding::Deflate => Box::new(DeflateBody(wrapped_body)),
[INFO] [stderr] 72 | |         &CompressionEncoding::Gzip => Box::new(GzipBody(wrapped_body)),
[INFO] [stderr] 73 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 69 |     match *encoding {
[INFO] [stderr] 70 |         CompressionEncoding::Brotli => Box::new(BrotliBody(wrapped_body)),
[INFO] [stderr] 71 |         CompressionEncoding::Deflate => Box::new(DeflateBody(wrapped_body)),
[INFO] [stderr] 72 |         CompressionEncoding::Gzip => Box::new(GzipBody(wrapped_body)),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     match encoding {
[INFO] [stderr] 78 | |         &CompressionEncoding::Brotli => Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 79 | |         &CompressionEncoding::Deflate => Encoding::Deflate,
[INFO] [stderr] 80 | |         &CompressionEncoding::Gzip => Encoding::Gzip,
[INFO] [stderr] 81 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 77 |     match *encoding {
[INFO] [stderr] 78 |         CompressionEncoding::Brotli => Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 79 |         CompressionEncoding::Deflate => Encoding::Deflate,
[INFO] [stderr] 80 |         CompressionEncoding::Gzip => Encoding::Gzip,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/lib.rs:84:77
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn which_compression<'a, 'b>(req: &'b Request, res: &'b Response, priority: &Vec<CompressionEncoding>) -> Option<CompressionEncoding> {
[INFO] [stderr]    |                                                                             ^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[CompressionEncoding]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]   --> src/lib.rs:84:22
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn which_compression<'a, 'b>(req: &'b Request, res: &'b Response, priority: &Vec<CompressionEncoding>) -> Option<CompressionEncoding> {
[INFO] [stderr]    |                      ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/lib.rs:87:16
[INFO] [stderr]    |
[INFO] [stderr] 87 |             if (content_length as &u64) < &DEFAULT_MIN_BYTES_FOR_COMPRESSION {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^----------------------------------
[INFO] [stderr]    |                                           |
[INFO] [stderr]    |                                           help: use the right value directly: `DEFAULT_MIN_BYTES_FOR_COMPRESSION`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/lib.rs:99:24
[INFO] [stderr]     |
[INFO] [stderr] 99  |                   return priority
[INFO] [stderr]     |  ________________________^
[INFO] [stderr] 100 | |                     .iter()
[INFO] [stderr] 101 | |                     .filter(|ce| quality_items.iter().find(|qi| {
[INFO] [stderr] 102 | |                         encoding_matches_header(ce, &qi.item)
[INFO] [stderr] 103 | |                     }).is_some())
[INFO] [stderr] 104 | |                     .nth(0)
[INFO] [stderr] 105 | |                     .map(|ce| ce.clone());
[INFO] [stderr]     | |_________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] help: Consider calling the dedicated `cloned` method
[INFO] [stderr]     |
[INFO] [stderr] 99  |                 return priority
[INFO] [stderr] 100 |                     .iter()
[INFO] [stderr] 101 |                     .filter(|ce| quality_items.iter().find(|qi| {
[INFO] [stderr] 102 |                         encoding_matches_header(ce, &qi.item)
[INFO] [stderr] 103 |                     }).is_some())
[INFO] [stderr] 104 |                     .nth(0).cloned();
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
[INFO] [stderr]    --> src/lib.rs:101:34
[INFO] [stderr]     |
[INFO] [stderr] 101 |                       .filter(|ce| quality_items.iter().find(|qi| {
[INFO] [stderr]     |  __________________________________^
[INFO] [stderr] 102 | |                         encoding_matches_header(ce, &qi.item)
[INFO] [stderr] 103 | |                     }).is_some())
[INFO] [stderr]     | |________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::search_is_some)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#search_is_some
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:85:5
[INFO] [stderr]     |
[INFO] [stderr] 85  | /     return match (res.headers.get::<iron::headers::ContentEncoding>(), res.headers.get::<ContentLength>(), req.headers.get::<AcceptEncoding>()) {
[INFO] [stderr] 86  | |         (None, Some(content_length), Some(&AcceptEncoding(ref quality_items))) => {
[INFO] [stderr] 87  | |             if (content_length as &u64) < &DEFAULT_MIN_BYTES_FOR_COMPRESSION {
[INFO] [stderr] 88  | |                 return None;
[INFO] [stderr] ...   |
[INFO] [stderr] 109 | |         _ => None
[INFO] [stderr] 110 | |     };
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 85  |     match (res.headers.get::<iron::headers::ContentEncoding>(), res.headers.get::<ContentLength>(), req.headers.get::<AcceptEncoding>()) {
[INFO] [stderr] 86  |         (None, Some(content_length), Some(&AcceptEncoding(ref quality_items))) => {
[INFO] [stderr] 87  |             if (content_length as &u64) < &DEFAULT_MIN_BYTES_FOR_COMPRESSION {
[INFO] [stderr] 88  |                 return None;
[INFO] [stderr] 89  |             }
[INFO] [stderr] 90  | 
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |         return chain;
[INFO] [stderr]     |         ^^^^^^^^^^^^^ help: remove `return` as shown: `chain`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:194:9
[INFO] [stderr]     |
[INFO] [stderr] 194 | /         return request::post("http://localhost:3000/",
[INFO] [stderr] 195 | |                              headers,
[INFO] [stderr] 196 | |                              data,
[INFO] [stderr] 197 | |                              chain).unwrap();
[INFO] [stderr]     | |_____________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 194 |         request::post("http://localhost:3000/",
[INFO] [stderr] 195 |                              headers,
[INFO] [stderr] 196 |                              data,
[INFO] [stderr] 197 |                              chain).unwrap()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 | /     match encoding {
[INFO] [stderr] 62 | |         &CompressionEncoding::Brotli => *header == Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 63 | |         &CompressionEncoding::Deflate => *header == Encoding::Deflate,
[INFO] [stderr] 64 | |         &CompressionEncoding::Gzip => *header == Encoding::Gzip || *header == Encoding::EncodingExt(String::from("*")),
[INFO] [stderr] 65 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 61 |     match *encoding {
[INFO] [stderr] 62 |         CompressionEncoding::Brotli => *header == Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 63 |         CompressionEncoding::Deflate => *header == Encoding::Deflate,
[INFO] [stderr] 64 |         CompressionEncoding::Gzip => *header == Encoding::Gzip || *header == Encoding::EncodingExt(String::from("*")),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     match encoding {
[INFO] [stderr] 70 | |         &CompressionEncoding::Brotli => Box::new(BrotliBody(wrapped_body)),
[INFO] [stderr] 71 | |         &CompressionEncoding::Deflate => Box::new(DeflateBody(wrapped_body)),
[INFO] [stderr] 72 | |         &CompressionEncoding::Gzip => Box::new(GzipBody(wrapped_body)),
[INFO] [stderr] 73 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 69 |     match *encoding {
[INFO] [stderr] 70 |         CompressionEncoding::Brotli => Box::new(BrotliBody(wrapped_body)),
[INFO] [stderr] 71 |         CompressionEncoding::Deflate => Box::new(DeflateBody(wrapped_body)),
[INFO] [stderr] 72 |         CompressionEncoding::Gzip => Box::new(GzipBody(wrapped_body)),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     match encoding {
[INFO] [stderr] 78 | |         &CompressionEncoding::Brotli => Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 79 | |         &CompressionEncoding::Deflate => Encoding::Deflate,
[INFO] [stderr] 80 | |         &CompressionEncoding::Gzip => Encoding::Gzip,
[INFO] [stderr] 81 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 77 |     match *encoding {
[INFO] [stderr] 78 |         CompressionEncoding::Brotli => Encoding::EncodingExt(String::from("br")),
[INFO] [stderr] 79 |         CompressionEncoding::Deflate => Encoding::Deflate,
[INFO] [stderr] 80 |         CompressionEncoding::Gzip => Encoding::Gzip,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/lib.rs:84:77
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn which_compression<'a, 'b>(req: &'b Request, res: &'b Response, priority: &Vec<CompressionEncoding>) -> Option<CompressionEncoding> {
[INFO] [stderr]    |                                                                             ^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[CompressionEncoding]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]   --> src/lib.rs:84:22
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn which_compression<'a, 'b>(req: &'b Request, res: &'b Response, priority: &Vec<CompressionEncoding>) -> Option<CompressionEncoding> {
[INFO] [stderr]    |                      ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/lib.rs:87:16
[INFO] [stderr]    |
[INFO] [stderr] 87 |             if (content_length as &u64) < &DEFAULT_MIN_BYTES_FOR_COMPRESSION {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^----------------------------------
[INFO] [stderr]    |                                           |
[INFO] [stderr]    |                                           help: use the right value directly: `DEFAULT_MIN_BYTES_FOR_COMPRESSION`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/lib.rs:99:24
[INFO] [stderr]     |
[INFO] [stderr] 99  |                   return priority
[INFO] [stderr]     |  ________________________^
[INFO] [stderr] 100 | |                     .iter()
[INFO] [stderr] 101 | |                     .filter(|ce| quality_items.iter().find(|qi| {
[INFO] [stderr] 102 | |                         encoding_matches_header(ce, &qi.item)
[INFO] [stderr] 103 | |                     }).is_some())
[INFO] [stderr] 104 | |                     .nth(0)
[INFO] [stderr] 105 | |                     .map(|ce| ce.clone());
[INFO] [stderr]     | |_________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] help: Consider calling the dedicated `cloned` method
[INFO] [stderr]     |
[INFO] [stderr] 99  |                 return priority
[INFO] [stderr] 100 |                     .iter()
[INFO] [stderr] 101 |                     .filter(|ce| quality_items.iter().find(|qi| {
[INFO] [stderr] 102 |                         encoding_matches_header(ce, &qi.item)
[INFO] [stderr] 103 |                     }).is_some())
[INFO] [stderr] 104 |                     .nth(0).cloned();
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: called `is_some()` after searching an `Iterator` with find. This is more succinctly expressed by calling `any()`.
[INFO] [stderr]    --> src/lib.rs:101:34
[INFO] [stderr]     |
[INFO] [stderr] 101 |                       .filter(|ce| quality_items.iter().find(|qi| {
[INFO] [stderr]     |  __________________________________^
[INFO] [stderr] 102 | |                         encoding_matches_header(ce, &qi.item)
[INFO] [stderr] 103 | |                     }).is_some())
[INFO] [stderr]     | |________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::search_is_some)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#search_is_some
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.58s
[INFO] running `"docker" "inspect" "e894d38c6cf239862599af0bd5e1f7452244c256e2d5938e94de811ded2c1d48"`
[INFO] running `"docker" "rm" "-f" "e894d38c6cf239862599af0bd5e1f7452244c256e2d5938e94de811ded2c1d48"`
[INFO] [stdout] e894d38c6cf239862599af0bd5e1f7452244c256e2d5938e94de811ded2c1d48