[INFO] crate palette_derive 0.4.1 is already in cache
[INFO] extracting crate palette_derive 0.4.1 into work/ex/clippy-test-run/sources/stable/reg/palette_derive/0.4.1
[INFO] extracting crate palette_derive 0.4.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/palette_derive/0.4.1
[INFO] validating manifest of palette_derive-0.4.1 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 palette_derive-0.4.1 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 palette_derive-0.4.1
[INFO] finished frobbing palette_derive-0.4.1
[INFO] frobbed toml for palette_derive-0.4.1 written to work/ex/clippy-test-run/sources/stable/reg/palette_derive/0.4.1/Cargo.toml
[INFO] started frobbing palette_derive-0.4.1
[INFO] finished frobbing palette_derive-0.4.1
[INFO] frobbed toml for palette_derive-0.4.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/palette_derive/0.4.1/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 palette_derive-0.4.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/palette_derive/0.4.1:/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] dfa43b290c40b00b5397fee851ce1b7d7c32b9a30dd82d1813a70bb7924311ac
[INFO] running `"docker" "start" "-a" "dfa43b290c40b00b5397fee851ce1b7d7c32b9a30dd82d1813a70bb7924311ac"`
[INFO] [stderr]     Checking syn v0.14.9
[INFO] [stderr]     Checking palette_derive v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/convert/from_color.rs:376:5
[INFO] [stderr]     |
[INFO] [stderr] 376 | /     return FromImplParameters {
[INFO] [stderr] 377 | |         generics,
[INFO] [stderr] 378 | |         alpha_path,
[INFO] [stderr] 379 | |         trait_path,
[INFO] [stderr] ...   |
[INFO] [stderr] 382 | |         method_call,
[INFO] [stderr] 383 | |     };
[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] 376 |     FromImplParameters {
[INFO] [stderr] 377 |         generics,
[INFO] [stderr] 378 |         alpha_path,
[INFO] [stderr] 379 |         trait_path,
[INFO] [stderr] 380 |         color_ty,
[INFO] [stderr] 381 |         component,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/convert/from_color.rs:587:5
[INFO] [stderr]     |
[INFO] [stderr] 587 | /     return FromColorTypeImplParameters {
[INFO] [stderr] 588 | |         generics,
[INFO] [stderr] 589 | |         alpha_path,
[INFO] [stderr] 590 | |         color_path,
[INFO] [stderr] 591 | |         color_ty,
[INFO] [stderr] 592 | |         component,
[INFO] [stderr] 593 | |     };
[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] 587 |     FromColorTypeImplParameters {
[INFO] [stderr] 588 |         generics,
[INFO] [stderr] 589 |         alpha_path,
[INFO] [stderr] 590 |         color_path,
[INFO] [stderr] 591 |         color_ty,
[INFO] [stderr] 592 |         component,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/convert/from_color.rs:376:5
[INFO] [stderr]     |
[INFO] [stderr] 376 | /     return FromImplParameters {
[INFO] [stderr] 377 | |         generics,
[INFO] [stderr] 378 | |         alpha_path,
[INFO] [stderr] 379 | |         trait_path,
[INFO] [stderr] ...   |
[INFO] [stderr] 382 | |         method_call,
[INFO] [stderr] 383 | |     };
[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] 376 |     FromImplParameters {
[INFO] [stderr] 377 |         generics,
[INFO] [stderr] 378 |         alpha_path,
[INFO] [stderr] 379 |         trait_path,
[INFO] [stderr] 380 |         color_ty,
[INFO] [stderr] 381 |         component,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/convert/from_color.rs:587:5
[INFO] [stderr]     |
[INFO] [stderr] 587 | /     return FromColorTypeImplParameters {
[INFO] [stderr] 588 | |         generics,
[INFO] [stderr] 589 | |         alpha_path,
[INFO] [stderr] 590 | |         color_path,
[INFO] [stderr] 591 | |         color_ty,
[INFO] [stderr] 592 | |         component,
[INFO] [stderr] 593 | |     };
[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] 587 |     FromColorTypeImplParameters {
[INFO] [stderr] 588 |         generics,
[INFO] [stderr] 589 |         alpha_path,
[INFO] [stderr] 590 |         color_path,
[INFO] [stderr] 591 |         color_ty,
[INFO] [stderr] 592 |         component,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/util.rs:40:10
[INFO] [stderr]    |
[INFO] [stderr] 40 |         .into_iter()
[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 .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/util.rs:52:10
[INFO] [stderr]    |
[INFO] [stderr] 52 |         .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: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/meta.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |         Err(_) => panic!(
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/meta.rs:175:9
[INFO] [stderr]     |
[INFO] [stderr] 175 |         Err(_) => panic!(
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/convert/from_color.rs:69:10
[INFO] [stderr]    |
[INFO] [stderr] 69 |         .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/convert/from_color.rs:411:34
[INFO] [stderr]     |
[INFO] [stderr] 411 |     let match_arms = COLOR_TYPES.into_iter().map(|&color| {
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/convert/from_color.rs:661:9
[INFO] [stderr]     |
[INFO] [stderr] 661 | /         match &*attribute_name.to_string() {
[INFO] [stderr] 662 | |             "palette_alpha" => {
[INFO] [stderr] 663 | |                 meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 664 | |                 self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 665 | |             }
[INFO] [stderr] 666 | |             _ => {}
[INFO] [stderr] 667 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 661 |         if let "palette_alpha" = &*attribute_name.to_string() {
[INFO] [stderr] 662 |     meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 663 |     self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 664 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/convert/into_color.rs:75:34
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let into_impls = COLOR_TYPES.into_iter().map(|&color| {
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/convert/into_color.rs:450:9
[INFO] [stderr]     |
[INFO] [stderr] 450 | /         match &*attribute_name.to_string() {
[INFO] [stderr] 451 | |             "palette_alpha" => {
[INFO] [stderr] 452 | |                 meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 453 | |                 self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 454 | |             }
[INFO] [stderr] 455 | |             _ => {}
[INFO] [stderr] 456 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 450 |         if let "palette_alpha" = &*attribute_name.to_string() {
[INFO] [stderr] 451 |     meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 452 |     self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 453 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (8/7)
[INFO] [stderr]    --> src/convert/shared.rs:101:1
[INFO] [stderr]     |
[INFO] [stderr] 101 | / pub fn generate_methods(
[INFO] [stderr] 102 | |     ident: &Ident,
[INFO] [stderr] 103 | |     convert_direction: ConvertDirection,
[INFO] [stderr] 104 | |     implementations: &[KeyValuePair],
[INFO] [stderr] ...   |
[INFO] [stderr] 217 | |     methods
[INFO] [stderr] 218 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/convert/shared.rs:326:17
[INFO] [stderr]     |
[INFO] [stderr] 326 |     fn get_best(&self, other: XyzConvert) -> XyzConvert {
[INFO] [stderr]     |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/encoding/pixel.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 | /         match &*attribute_name.to_string() {
[INFO] [stderr] 111 | |             "repr" => {
[INFO] [stderr] 112 | |                 let items = meta::parse_tuple_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 113 | |                 let contains_c = items.into_iter().find(|item: &Ident| item == "C").is_some();
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |             _ => {}
[INFO] [stderr] 120 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 110 |         if let "repr" = &*attribute_name.to_string() {
[INFO] [stderr] 111 |     let items = meta::parse_tuple_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 112 |     let contains_c = items.into_iter().find(|item: &Ident| item == "C").is_some();
[INFO] [stderr] 113 | 
[INFO] [stderr] 114 |     if contains_c {
[INFO] [stderr] 115 |         self.repr_c = true;
[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/encoding/pixel.rs:113:34
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 let contains_c = items.into_iter().find(|item: &Ident| item == "C").is_some();
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::search_is_some)] on by default
[INFO] [stderr]     = note: replace `find(|item: &Ident| item == "C").is_some()` with `any(|item: &Ident| item == "C")`
[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: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/util.rs:40:10
[INFO] [stderr]    |
[INFO] [stderr] 40 |         .into_iter()
[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 .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/util.rs:52:10
[INFO] [stderr]    |
[INFO] [stderr] 52 |         .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: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/meta.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |         Err(_) => panic!(
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/meta.rs:175:9
[INFO] [stderr]     |
[INFO] [stderr] 175 |         Err(_) => panic!(
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/convert/from_color.rs:69:10
[INFO] [stderr]    |
[INFO] [stderr] 69 |         .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/convert/from_color.rs:411:34
[INFO] [stderr]     |
[INFO] [stderr] 411 |     let match_arms = COLOR_TYPES.into_iter().map(|&color| {
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/convert/from_color.rs:661:9
[INFO] [stderr]     |
[INFO] [stderr] 661 | /         match &*attribute_name.to_string() {
[INFO] [stderr] 662 | |             "palette_alpha" => {
[INFO] [stderr] 663 | |                 meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 664 | |                 self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 665 | |             }
[INFO] [stderr] 666 | |             _ => {}
[INFO] [stderr] 667 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 661 |         if let "palette_alpha" = &*attribute_name.to_string() {
[INFO] [stderr] 662 |     meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 663 |     self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 664 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]   --> src/convert/into_color.rs:75:34
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let into_impls = COLOR_TYPES.into_iter().map(|&color| {
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/convert/into_color.rs:450:9
[INFO] [stderr]     |
[INFO] [stderr] 450 | /         match &*attribute_name.to_string() {
[INFO] [stderr] 451 | |             "palette_alpha" => {
[INFO] [stderr] 452 | |                 meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 453 | |                 self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 454 | |             }
[INFO] [stderr] 455 | |             _ => {}
[INFO] [stderr] 456 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 450 |         if let "palette_alpha" = &*attribute_name.to_string() {
[INFO] [stderr] 451 |     meta::assert_empty_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 452 |     self.alpha_property = Some((field_name, ty));
[INFO] [stderr] 453 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (8/7)
[INFO] [stderr]    --> src/convert/shared.rs:101:1
[INFO] [stderr]     |
[INFO] [stderr] 101 | / pub fn generate_methods(
[INFO] [stderr] 102 | |     ident: &Ident,
[INFO] [stderr] 103 | |     convert_direction: ConvertDirection,
[INFO] [stderr] 104 | |     implementations: &[KeyValuePair],
[INFO] [stderr] ...   |
[INFO] [stderr] 217 | |     methods
[INFO] [stderr] 218 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/convert/shared.rs:326:17
[INFO] [stderr]     |
[INFO] [stderr] 326 |     fn get_best(&self, other: XyzConvert) -> XyzConvert {
[INFO] [stderr]     |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/encoding/pixel.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 | /         match &*attribute_name.to_string() {
[INFO] [stderr] 111 | |             "repr" => {
[INFO] [stderr] 112 | |                 let items = meta::parse_tuple_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 113 | |                 let contains_c = items.into_iter().find(|item: &Ident| item == "C").is_some();
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |             _ => {}
[INFO] [stderr] 120 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 110 |         if let "repr" = &*attribute_name.to_string() {
[INFO] [stderr] 111 |     let items = meta::parse_tuple_attribute(&attribute_name, attribute_tts);
[INFO] [stderr] 112 |     let contains_c = items.into_iter().find(|item: &Ident| item == "C").is_some();
[INFO] [stderr] 113 | 
[INFO] [stderr] 114 |     if contains_c {
[INFO] [stderr] 115 |         self.repr_c = true;
[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/encoding/pixel.rs:113:34
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 let contains_c = items.into_iter().find(|item: &Ident| item == "C").is_some();
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::search_is_some)] on by default
[INFO] [stderr]     = note: replace `find(|item: &Ident| item == "C").is_some()` with `any(|item: &Ident| item == "C")`
[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 7.24s
[INFO] running `"docker" "inspect" "dfa43b290c40b00b5397fee851ce1b7d7c32b9a30dd82d1813a70bb7924311ac"`
[INFO] running `"docker" "rm" "-f" "dfa43b290c40b00b5397fee851ce1b7d7c32b9a30dd82d1813a70bb7924311ac"`
[INFO] [stdout] dfa43b290c40b00b5397fee851ce1b7d7c32b9a30dd82d1813a70bb7924311ac