[INFO] crate derive-into-owned 0.1.0 is already in cache
[INFO] extracting crate derive-into-owned 0.1.0 into work/ex/clippy-test-run/sources/stable/reg/derive-into-owned/0.1.0
[INFO] extracting crate derive-into-owned 0.1.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/derive-into-owned/0.1.0
[INFO] validating manifest of derive-into-owned-0.1.0 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 derive-into-owned-0.1.0 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 derive-into-owned-0.1.0
[INFO] finished frobbing derive-into-owned-0.1.0
[INFO] frobbed toml for derive-into-owned-0.1.0 written to work/ex/clippy-test-run/sources/stable/reg/derive-into-owned/0.1.0/Cargo.toml
[INFO] started frobbing derive-into-owned-0.1.0
[INFO] finished frobbing derive-into-owned-0.1.0
[INFO] frobbed toml for derive-into-owned-0.1.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/derive-into-owned/0.1.0/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 derive-into-owned-0.1.0 against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/derive-into-owned/0.1.0:/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 -Dclippy::into_iter_on_array" "-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] 31f772e84e7f7b91057e02227715ecce97baf91e8b06d634c754a207d0c714ef
[INFO] running `"docker" "start" "-a" "31f772e84e7f7b91057e02227715ecce97baf91e8b06d634c754a207d0c714ef"`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking derive-into-owned v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0602]: unknown lint: `clippy::into_iter_on_array`
[INFO] [stderr]   |
[INFO] [stderr]   = note: requested on the command line with `-D clippy::into_iter_on_array`
[INFO] [stderr] 
[INFO] [stderr] error[E0602]: unknown lint: `clippy::into_iter_on_array`
[INFO] [stderr]   |
[INFO] [stderr]   = note: requested on the command line with `-D clippy::into_iter_on_array`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0602`.
[INFO] [stderr] error: Could not compile `unicode-xid`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0602`.
[INFO] [stderr] error: Could not compile `quote`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:138:58
[INFO] [stderr]     |
[INFO] [stderr] 138 |             ast.generics.ty_params.iter().map(|ty| { let ref ident = &ty.ident; quote! { #ident } })
[INFO] [stderr]     |                                                      ----^^^^^^^^^------------- help: try: `let ident = &(&ty.ident);`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:144:78
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let owned_type_params = ast.generics.ty_params.iter().map(|ty| { let ref ident = &ty.ident; quote! { #ident } });
[INFO] [stderr]     |                                                                          ----^^^^^^^^^------------- help: try: `let ident = &(&ty.ident);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:195:29
[INFO] [stderr]     |
[INFO] [stderr] 195 |                         let ref ident = field.ident.as_ref().unwrap();
[INFO] [stderr]     |                         ----^^^^^^^^^--------------------------------- help: try: `let ident = &field.ident.as_ref().unwrap();`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:237:78
[INFO] [stderr]     |
[INFO] [stderr] 237 |         let owned_type_params = ast.generics.ty_params.iter().map(|ty| { let ref ident = &ty.ident; quote! { #ident } });
[INFO] [stderr]     |                                                                          ----^^^^^^^^^------------- help: try: `let ident = &(&ty.ident);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:279:29
[INFO] [stderr]     |
[INFO] [stderr] 279 |                         let ref ident = field.ident.as_ref().unwrap();
[INFO] [stderr]     |                         ----^^^^^^^^^--------------------------------- help: try: `let ident = &field.ident.as_ref().unwrap();`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/lib.rs:327:9
[INFO] [stderr]     |
[INFO] [stderr] 327 | /         match &field.ty {
[INFO] [stderr] 328 | |             &syn::Ty::Path(None, syn::Path { ref segments, .. }) => {
[INFO] [stderr] 329 | |                 if is_cow(segments) {
[INFO] [stderr] 330 | |                     FieldKind::PlainCow
[INFO] [stderr] ...   |
[INFO] [stderr] 341 | |             _ => FieldKind::JustMoved,
[INFO] [stderr] 342 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 327 |         match field.ty {
[INFO] [stderr] 328 |             syn::Ty::Path(None, syn::Path { ref segments, .. }) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:348:9
[INFO] [stderr]     |
[INFO] [stderr] 348 | /         match self {
[INFO] [stderr] 349 | |             &PlainCow => quote! { ::std::borrow::Cow::Owned(#var.into_owned()) },
[INFO] [stderr] 350 | |             &AssumedCow => quote! { #var.into_owned() },
[INFO] [stderr] 351 | |             &OptField(levels, ref inner) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 371 | |             &JustMoved => quote! { #var },
[INFO] [stderr] 372 | |         }
[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] 348 |         match *self {
[INFO] [stderr] 349 |             PlainCow => quote! { ::std::borrow::Cow::Owned(#var.into_owned()) },
[INFO] [stderr] 350 |             AssumedCow => quote! { #var.into_owned() },
[INFO] [stderr] 351 |             OptField(levels, ref inner) => {
[INFO] [stderr] 352 |                 let next = syn::Ident::from("val");
[INFO] [stderr] 353 |                 let next = quote! { #next };
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:378:9
[INFO] [stderr]     |
[INFO] [stderr] 378 | /         match self {
[INFO] [stderr] 379 | |             &PlainCow => quote! { ::std::borrow::Cow::Borrowed(#var.as_ref()) },
[INFO] [stderr] 380 | |             &AssumedCow => quote! { #var.borrowed() },
[INFO] [stderr] 381 | |             &OptField(levels, ref inner) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 401 | |             &JustMoved => quote! { #var.clone() },
[INFO] [stderr] 402 | |         }
[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] 378 |         match *self {
[INFO] [stderr] 379 |             PlainCow => quote! { ::std::borrow::Cow::Borrowed(#var.as_ref()) },
[INFO] [stderr] 380 |             AssumedCow => quote! { #var.borrowed() },
[INFO] [stderr] 381 |             OptField(levels, ref inner) => {
[INFO] [stderr] 382 |                 let next = syn::Ident::from("val");
[INFO] [stderr] 383 |                 let next = quote! { #next };
[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:406:32
[INFO] [stderr]     |
[INFO] [stderr] 406 | fn type_hopefully_is(segments: &Vec<syn::PathSegment>, expected: &str) -> bool {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[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: needlessly taken reference of both operands
[INFO] [stderr]    --> src/lib.rs:416:12
[INFO] [stderr]     |
[INFO] [stderr] 416 |         if &segments[..] == &expected[expected.len() - len - 1..] {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 416 |         if segments[..] == expected[expected.len() - len - 1..] {
[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:424:21
[INFO] [stderr]     |
[INFO] [stderr] 424 | fn is_cow(segments: &Vec<syn::PathSegment>) -> bool {
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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:428:27
[INFO] [stderr]     |
[INFO] [stderr] 428 | fn is_cow_alike(segments: &Vec<syn::PathSegment>) -> bool {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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:436:29
[INFO] [stderr]     |
[INFO] [stderr] 436 | fn is_opt_cow(mut segments: &Vec<syn::PathSegment>) -> Option<FieldKind> {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/lib.rs:440:13
[INFO] [stderr]     |
[INFO] [stderr] 440 | /             match *segments.last().unwrap() {
[INFO] [stderr] 441 | |                 syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } => {
[INFO] [stderr] 442 | |                     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 443 | |                         // Option<&'a ?> cannot be moved but let the compiler complain
[INFO] [stderr] ...   |
[INFO] [stderr] 462 | |                 _ => {}
[INFO] [stderr] 463 | |             }
[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] 440 |             if let syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } = *segments.last().unwrap() {
[INFO] [stderr] 441 |     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 442 |         // Option<&'a ?> cannot be moved but let the compiler complain
[INFO] [stderr] 443 |         // don't know about data bindings
[INFO] [stderr] 444 |         break;
[INFO] [stderr] 445 |     }
[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:476:32
[INFO] [stderr]     |
[INFO] [stderr] 476 | fn is_iter_field(mut segments: &Vec<syn::PathSegment>) -> Option<FieldKind> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/lib.rs:480:13
[INFO] [stderr]     |
[INFO] [stderr] 480 | /             match *segments.last().unwrap() {
[INFO] [stderr] 481 | |                 syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } => {
[INFO] [stderr] 482 | |                     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 483 | |                         break;
[INFO] [stderr] ...   |
[INFO] [stderr] 499 | |                 _ => {}
[INFO] [stderr] 500 | |             }
[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] 480 |             if let syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } = *segments.last().unwrap() {
[INFO] [stderr] 481 |     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 482 |         break;
[INFO] [stderr] 483 |     }
[INFO] [stderr] 484 | 
[INFO] [stderr] 485 |     if data.types.len() != 1 {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:138:58
[INFO] [stderr]     |
[INFO] [stderr] 138 |             ast.generics.ty_params.iter().map(|ty| { let ref ident = &ty.ident; quote! { #ident } })
[INFO] [stderr]     |                                                      ----^^^^^^^^^------------- help: try: `let ident = &(&ty.ident);`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:144:78
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let owned_type_params = ast.generics.ty_params.iter().map(|ty| { let ref ident = &ty.ident; quote! { #ident } });
[INFO] [stderr]     |                                                                          ----^^^^^^^^^------------- help: try: `let ident = &(&ty.ident);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:195:29
[INFO] [stderr]     |
[INFO] [stderr] 195 |                         let ref ident = field.ident.as_ref().unwrap();
[INFO] [stderr]     |                         ----^^^^^^^^^--------------------------------- help: try: `let ident = &field.ident.as_ref().unwrap();`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:237:78
[INFO] [stderr]     |
[INFO] [stderr] 237 |         let owned_type_params = ast.generics.ty_params.iter().map(|ty| { let ref ident = &ty.ident; quote! { #ident } });
[INFO] [stderr]     |                                                                          ----^^^^^^^^^------------- help: try: `let ident = &(&ty.ident);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:279:29
[INFO] [stderr]     |
[INFO] [stderr] 279 |                         let ref ident = field.ident.as_ref().unwrap();
[INFO] [stderr]     |                         ----^^^^^^^^^--------------------------------- help: try: `let ident = &field.ident.as_ref().unwrap();`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]    --> src/lib.rs:327:9
[INFO] [stderr]     |
[INFO] [stderr] 327 | /         match &field.ty {
[INFO] [stderr] 328 | |             &syn::Ty::Path(None, syn::Path { ref segments, .. }) => {
[INFO] [stderr] 329 | |                 if is_cow(segments) {
[INFO] [stderr] 330 | |                     FieldKind::PlainCow
[INFO] [stderr] ...   |
[INFO] [stderr] 341 | |             _ => FieldKind::JustMoved,
[INFO] [stderr] 342 | |         }
[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: try
[INFO] [stderr]     |
[INFO] [stderr] 327 |         match field.ty {
[INFO] [stderr] 328 |             syn::Ty::Path(None, syn::Path { ref segments, .. }) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:348:9
[INFO] [stderr]     |
[INFO] [stderr] 348 | /         match self {
[INFO] [stderr] 349 | |             &PlainCow => quote! { ::std::borrow::Cow::Owned(#var.into_owned()) },
[INFO] [stderr] 350 | |             &AssumedCow => quote! { #var.into_owned() },
[INFO] [stderr] 351 | |             &OptField(levels, ref inner) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 371 | |             &JustMoved => quote! { #var },
[INFO] [stderr] 372 | |         }
[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] 348 |         match *self {
[INFO] [stderr] 349 |             PlainCow => quote! { ::std::borrow::Cow::Owned(#var.into_owned()) },
[INFO] [stderr] 350 |             AssumedCow => quote! { #var.into_owned() },
[INFO] [stderr] 351 |             OptField(levels, ref inner) => {
[INFO] [stderr] 352 |                 let next = syn::Ident::from("val");
[INFO] [stderr] 353 |                 let next = quote! { #next };
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:378:9
[INFO] [stderr]     |
[INFO] [stderr] 378 | /         match self {
[INFO] [stderr] 379 | |             &PlainCow => quote! { ::std::borrow::Cow::Borrowed(#var.as_ref()) },
[INFO] [stderr] 380 | |             &AssumedCow => quote! { #var.borrowed() },
[INFO] [stderr] 381 | |             &OptField(levels, ref inner) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 401 | |             &JustMoved => quote! { #var.clone() },
[INFO] [stderr] 402 | |         }
[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] 378 |         match *self {
[INFO] [stderr] 379 |             PlainCow => quote! { ::std::borrow::Cow::Borrowed(#var.as_ref()) },
[INFO] [stderr] 380 |             AssumedCow => quote! { #var.borrowed() },
[INFO] [stderr] 381 |             OptField(levels, ref inner) => {
[INFO] [stderr] 382 |                 let next = syn::Ident::from("val");
[INFO] [stderr] 383 |                 let next = quote! { #next };
[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:406:32
[INFO] [stderr]     |
[INFO] [stderr] 406 | fn type_hopefully_is(segments: &Vec<syn::PathSegment>, expected: &str) -> bool {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[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: needlessly taken reference of both operands
[INFO] [stderr]    --> src/lib.rs:416:12
[INFO] [stderr]     |
[INFO] [stderr] 416 |         if &segments[..] == &expected[expected.len() - len - 1..] {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 416 |         if segments[..] == expected[expected.len() - len - 1..] {
[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:424:21
[INFO] [stderr]     |
[INFO] [stderr] 424 | fn is_cow(segments: &Vec<syn::PathSegment>) -> bool {
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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:428:27
[INFO] [stderr]     |
[INFO] [stderr] 428 | fn is_cow_alike(segments: &Vec<syn::PathSegment>) -> bool {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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:436:29
[INFO] [stderr]     |
[INFO] [stderr] 436 | fn is_opt_cow(mut segments: &Vec<syn::PathSegment>) -> Option<FieldKind> {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/lib.rs:440:13
[INFO] [stderr]     |
[INFO] [stderr] 440 | /             match *segments.last().unwrap() {
[INFO] [stderr] 441 | |                 syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } => {
[INFO] [stderr] 442 | |                     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 443 | |                         // Option<&'a ?> cannot be moved but let the compiler complain
[INFO] [stderr] ...   |
[INFO] [stderr] 462 | |                 _ => {}
[INFO] [stderr] 463 | |             }
[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] 440 |             if let syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } = *segments.last().unwrap() {
[INFO] [stderr] 441 |     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 442 |         // Option<&'a ?> cannot be moved but let the compiler complain
[INFO] [stderr] 443 |         // don't know about data bindings
[INFO] [stderr] 444 |         break;
[INFO] [stderr] 445 |     }
[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:476:32
[INFO] [stderr]     |
[INFO] [stderr] 476 | fn is_iter_field(mut segments: &Vec<syn::PathSegment>) -> Option<FieldKind> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[syn::PathSegment]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[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/lib.rs:480:13
[INFO] [stderr]     |
[INFO] [stderr] 480 | /             match *segments.last().unwrap() {
[INFO] [stderr] 481 | |                 syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } => {
[INFO] [stderr] 482 | |                     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 483 | |                         break;
[INFO] [stderr] ...   |
[INFO] [stderr] 499 | |                 _ => {}
[INFO] [stderr] 500 | |             }
[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] 480 |             if let syn::PathSegment { parameters: syn::PathParameters::AngleBracketed(ref data), .. } = *segments.last().unwrap() {
[INFO] [stderr] 481 |     if !data.lifetimes.is_empty() || !data.bindings.is_empty() {
[INFO] [stderr] 482 |         break;
[INFO] [stderr] 483 |     }
[INFO] [stderr] 484 | 
[INFO] [stderr] 485 |     if data.types.len() != 1 {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "31f772e84e7f7b91057e02227715ecce97baf91e8b06d634c754a207d0c714ef"`
[INFO] running `"docker" "rm" "-f" "31f772e84e7f7b91057e02227715ecce97baf91e8b06d634c754a207d0c714ef"`
[INFO] [stdout] 31f772e84e7f7b91057e02227715ecce97baf91e8b06d634c754a207d0c714ef