[INFO] crate bittwiddler 0.0.1 is already in cache
[INFO] extracting crate bittwiddler 0.0.1 into work/ex/clippy-test-run/sources/stable/reg/bittwiddler/0.0.1
[INFO] extracting crate bittwiddler 0.0.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/bittwiddler/0.0.1
[INFO] validating manifest of bittwiddler-0.0.1 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 bittwiddler-0.0.1 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 bittwiddler-0.0.1
[INFO] finished frobbing bittwiddler-0.0.1
[INFO] frobbed toml for bittwiddler-0.0.1 written to work/ex/clippy-test-run/sources/stable/reg/bittwiddler/0.0.1/Cargo.toml
[INFO] started frobbing bittwiddler-0.0.1
[INFO] finished frobbing bittwiddler-0.0.1
[INFO] frobbed toml for bittwiddler-0.0.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/bittwiddler/0.0.1/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 bittwiddler-0.0.1 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-2/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/bittwiddler/0.0.1:/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 -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] d7b19322f6baa248c1c921087b5fe41842e193b75a9750e16b70c2f0e916a3b4
[INFO] running `"docker" "start" "-a" "d7b19322f6baa248c1c921087b5fe41842e193b75a9750e16b70c2f0e916a3b4"`
[INFO] [stderr]     Checking syn v0.13.11
[INFO] [stderr]     Checking bittwiddler v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:519:28
[INFO] [stderr]     |
[INFO] [stderr] 519 |                       } else {
[INFO] [stderr]     |  ____________________________^
[INFO] [stderr] 520 | |                         if dimensions.unwrap() != coords.len() {
[INFO] [stderr] 521 | |                             panic!("Instance {} on {} has mismatched dimensions", instance_name, input_ident.as_ref());
[INFO] [stderr] 522 | |                         }
[INFO] [stderr] 523 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 519 |                     } else if dimensions.unwrap() != coords.len() {
[INFO] [stderr] 520 |     panic!("Instance {} on {} has mismatched dimensions", instance_name, input_ident.as_ref());
[INFO] [stderr] 521 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:558:32
[INFO] [stderr]     |
[INFO] [stderr] 558 |                           } else {
[INFO] [stderr]     |  ________________________________^
[INFO] [stderr] 559 | |                             if mirror {
[INFO] [stderr] 560 | |                                 let mirror_ident = syn::Ident::from(format!("mirror_{}", dim_i));
[INFO] [stderr] 561 | |                                 // mirror_idents.push(quote!{#mirror_ident: bool});
[INFO] [stderr] ...   |
[INFO] [stderr] 574 | |                             }
[INFO] [stderr] 575 | |                         }
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 558 |                         } else if mirror {
[INFO] [stderr] 559 |     let mirror_ident = syn::Ident::from(format!("mirror_{}", dim_i));
[INFO] [stderr] 560 |     // mirror_idents.push(quote!{#mirror_ident: bool});
[INFO] [stderr] 561 |     index_each_dim.push(quote! {
[INFO] [stderr] 562 |         (start_coord as isize +
[INFO] [stderr] 563 |             (if #mirror_ident {-1} else {1}) * #coord_i as isize) as usize
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:519:28
[INFO] [stderr]     |
[INFO] [stderr] 519 |                       } else {
[INFO] [stderr]     |  ____________________________^
[INFO] [stderr] 520 | |                         if dimensions.unwrap() != coords.len() {
[INFO] [stderr] 521 | |                             panic!("Instance {} on {} has mismatched dimensions", instance_name, input_ident.as_ref());
[INFO] [stderr] 522 | |                         }
[INFO] [stderr] 523 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 519 |                     } else if dimensions.unwrap() != coords.len() {
[INFO] [stderr] 520 |     panic!("Instance {} on {} has mismatched dimensions", instance_name, input_ident.as_ref());
[INFO] [stderr] 521 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:558:32
[INFO] [stderr]     |
[INFO] [stderr] 558 |                           } else {
[INFO] [stderr]     |  ________________________________^
[INFO] [stderr] 559 | |                             if mirror {
[INFO] [stderr] 560 | |                                 let mirror_ident = syn::Ident::from(format!("mirror_{}", dim_i));
[INFO] [stderr] 561 | |                                 // mirror_idents.push(quote!{#mirror_ident: bool});
[INFO] [stderr] ...   |
[INFO] [stderr] 574 | |                             }
[INFO] [stderr] 575 | |                         }
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 558 |                         } else if mirror {
[INFO] [stderr] 559 |     let mirror_ident = syn::Ident::from(format!("mirror_{}", dim_i));
[INFO] [stderr] 560 |     // mirror_idents.push(quote!{#mirror_ident: bool});
[INFO] [stderr] 561 |     index_each_dim.push(quote! {
[INFO] [stderr] 562 |         (start_coord as isize +
[INFO] [stderr] 563 |             (if #mirror_ident {-1} else {1}) * #coord_i as isize) as usize
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::slice_unchecked': use `get_unchecked(begin..end)` instead
[INFO] [stderr]    --> src/lib.rs:294:36
[INFO] [stderr]     |
[INFO] [stderr] 294 |             unsafe { Some(self.str.slice_unchecked(start_of_ret_idx, end_of_ret_idx)) }
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::slice_unchecked': use `get_unchecked(begin..end)` instead
[INFO] [stderr]    --> src/lib.rs:294:36
[INFO] [stderr]     |
[INFO] [stderr] 294 |             unsafe { Some(self.str.slice_unchecked(start_of_ret_idx, end_of_ret_idx)) }
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 31
[INFO] [stderr]    --> src/lib.rs:41:1
[INFO] [stderr]     |
[INFO] [stderr] 41  | / pub fn bitpattern(input: TokenStream) -> TokenStream {
[INFO] [stderr] 42  | |     // Parse the input tokens into a syntax tree
[INFO] [stderr] 43  | |     let input: syn::DeriveInput = syn::parse(input).unwrap();
[INFO] [stderr] 44  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 157 | |     }
[INFO] [stderr] 158 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if dataenum.variants.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `dataenum.variants.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] error: for loop over `$ single`, which is an `Option`. This is more readably written as an `if let` statement.
[INFO] [stderr]    --> src/lib.rs:129:13
[INFO] [stderr]     |
[INFO] [stderr] 129 | /             quote! {
[INFO] [stderr] 130 | |                 impl #input_ident {
[INFO] [stderr] 131 | |                     pub fn decode(x: (#(#bools2),*)) -> Self {
[INFO] [stderr] 132 | |                         match x {
[INFO] [stderr] ...   |
[INFO] [stderr] 137 | |                 }
[INFO] [stderr] 138 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::for_loop_over_option)] on by default
[INFO] [stderr]     = help: consider replacing `for $ first in $ single` with `if let Some($ first) = $ single`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#for_loop_over_option
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: for loop over `$ single`, which is an `Option`. This is more readably written as an `if let` statement.
[INFO] [stderr]    --> src/lib.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 | /             quote! {
[INFO] [stderr] 142 | |                 impl #input_ident {
[INFO] [stderr] 143 | |                     pub fn decode(x: (#(#bools2),*)) -> Result<Self, #bits_errtype> {
[INFO] [stderr] 144 | |                         Ok(match x {
[INFO] [stderr] ...   |
[INFO] [stderr] 149 | |                 }
[INFO] [stderr] 150 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider replacing `for $ first in $ single` with `if let Some($ first) = $ single`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#for_loop_over_option
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:204:9
[INFO] [stderr]     |
[INFO] [stderr] 204 | /         match self {
[INFO] [stderr] 205 | |             &BitTwiddlerFieldRef::Ident(id) => id.as_ref().to_owned(),
[INFO] [stderr] 206 | |             &BitTwiddlerFieldRef::Index(idx) => format!("{}", idx),
[INFO] [stderr] 207 | |             &BitTwiddlerFieldRef::Self_ => "Enum".to_owned(),
[INFO] [stderr] 208 | |         }
[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] 204 |         match *self {
[INFO] [stderr] 205 |             BitTwiddlerFieldRef::Ident(id) => id.as_ref().to_owned(),
[INFO] [stderr] 206 |             BitTwiddlerFieldRef::Index(idx) => format!("{}", idx),
[INFO] [stderr] 207 |             BitTwiddlerFieldRef::Self_ => "Enum".to_owned(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:300:5
[INFO] [stderr]     |
[INFO] [stderr] 300 | /     if let &syn::Type::Path(ref typep) = ty {
[INFO] [stderr] 301 | |         if typep.qself.is_none() && typep.path.leading_colon.is_none() && typep.path.segments.len() == 1 &&
[INFO] [stderr] 302 | |             typep.path.segments[0].ident.as_ref() == "bool" {
[INFO] [stderr] 303 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 309 | |         false
[INFO] [stderr] 310 | |     }
[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] 300 |     if let syn::Type::Path(ref typep) = *ty {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this if-then-else expression returns a bool literal
[INFO] [stderr]    --> src/lib.rs:301:9
[INFO] [stderr]     |
[INFO] [stderr] 301 | /         if typep.qself.is_none() && typep.path.leading_colon.is_none() && typep.path.segments.len() == 1 &&
[INFO] [stderr] 302 | |             typep.path.segments[0].ident.as_ref() == "bool" {
[INFO] [stderr] 303 | |
[INFO] [stderr] 304 | |             true
[INFO] [stderr] 305 | |         } else {
[INFO] [stderr] 306 | |             false
[INFO] [stderr] 307 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stderr] help: you can reduce it to
[INFO] [stderr]     |
[INFO] [stderr] 301 |         typep.qself.is_none() && typep.path.leading_colon.is_none() && typep.path.segments.len() == 1 &&
[INFO] [stderr] 302 |             typep.path.segments[0].ident.as_ref() == "bool"
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 93
[INFO] [stderr]    --> src/lib.rs:314:1
[INFO] [stderr]     |
[INFO] [stderr] 314 | / pub fn bittwiddler(input: TokenStream) -> TokenStream {
[INFO] [stderr] 315 | |     let input: syn::DeriveInput = syn::parse(input).unwrap();
[INFO] [stderr] 316 | |
[INFO] [stderr] 317 | |     let main_bittwiddler_attribs = parse_multi_string_attr_helper(&input.attrs, "bittwiddler",
[INFO] [stderr] ...   |
[INFO] [stderr] 824 | |     all_tokens.into()
[INFO] [stderr] 825 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:335:28
[INFO] [stderr]     |
[INFO] [stderr] 335 |                         if bittwiddler_field_attrs.len() > 0 {
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!bittwiddler_field_attrs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:350:28
[INFO] [stderr]     |
[INFO] [stderr] 350 |                         if bittwiddler_field_attrs.len() > 0 {
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!bittwiddler_field_attrs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:368:16
[INFO] [stderr]     |
[INFO] [stderr] 368 |             if bittwiddler_field_attrs.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!bittwiddler_field_attrs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:399:44
[INFO] [stderr]     |
[INFO] [stderr] 399 |                 if errtype_tmp.starts_with("'") {
[INFO] [stderr]     |                                            ^^^ help: try using a char instead: `'''`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:400:47
[INFO] [stderr]     |
[INFO] [stderr] 400 |                     if !errtype_tmp.ends_with("'") {
[INFO] [stderr]     |                                               ^^^ help: try using a char instead: `'''`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:426:16
[INFO] [stderr]     |
[INFO] [stderr] 426 |             if field_locs.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `field_locs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `bittwiddler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: the function has a cyclomatic complexity of 31
[INFO] [stderr]    --> src/lib.rs:41:1
[INFO] [stderr]     |
[INFO] [stderr] 41  | / pub fn bitpattern(input: TokenStream) -> TokenStream {
[INFO] [stderr] 42  | |     // Parse the input tokens into a syntax tree
[INFO] [stderr] 43  | |     let input: syn::DeriveInput = syn::parse(input).unwrap();
[INFO] [stderr] 44  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 157 | |     }
[INFO] [stderr] 158 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if dataenum.variants.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `dataenum.variants.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] error: for loop over `$ single`, which is an `Option`. This is more readably written as an `if let` statement.
[INFO] [stderr]    --> src/lib.rs:129:13
[INFO] [stderr]     |
[INFO] [stderr] 129 | /             quote! {
[INFO] [stderr] 130 | |                 impl #input_ident {
[INFO] [stderr] 131 | |                     pub fn decode(x: (#(#bools2),*)) -> Self {
[INFO] [stderr] 132 | |                         match x {
[INFO] [stderr] ...   |
[INFO] [stderr] 137 | |                 }
[INFO] [stderr] 138 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::for_loop_over_option)] on by default
[INFO] [stderr]     = help: consider replacing `for $ first in $ single` with `if let Some($ first) = $ single`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#for_loop_over_option
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: for loop over `$ single`, which is an `Option`. This is more readably written as an `if let` statement.
[INFO] [stderr]    --> src/lib.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 | /             quote! {
[INFO] [stderr] 142 | |                 impl #input_ident {
[INFO] [stderr] 143 | |                     pub fn decode(x: (#(#bools2),*)) -> Result<Self, #bits_errtype> {
[INFO] [stderr] 144 | |                         Ok(match x {
[INFO] [stderr] ...   |
[INFO] [stderr] 149 | |                 }
[INFO] [stderr] 150 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider replacing `for $ first in $ single` with `if let Some($ first) = $ single`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#for_loop_over_option
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:204:9
[INFO] [stderr]     |
[INFO] [stderr] 204 | /         match self {
[INFO] [stderr] 205 | |             &BitTwiddlerFieldRef::Ident(id) => id.as_ref().to_owned(),
[INFO] [stderr] 206 | |             &BitTwiddlerFieldRef::Index(idx) => format!("{}", idx),
[INFO] [stderr] 207 | |             &BitTwiddlerFieldRef::Self_ => "Enum".to_owned(),
[INFO] [stderr] 208 | |         }
[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] 204 |         match *self {
[INFO] [stderr] 205 |             BitTwiddlerFieldRef::Ident(id) => id.as_ref().to_owned(),
[INFO] [stderr] 206 |             BitTwiddlerFieldRef::Index(idx) => format!("{}", idx),
[INFO] [stderr] 207 |             BitTwiddlerFieldRef::Self_ => "Enum".to_owned(),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:300:5
[INFO] [stderr]     |
[INFO] [stderr] 300 | /     if let &syn::Type::Path(ref typep) = ty {
[INFO] [stderr] 301 | |         if typep.qself.is_none() && typep.path.leading_colon.is_none() && typep.path.segments.len() == 1 &&
[INFO] [stderr] 302 | |             typep.path.segments[0].ident.as_ref() == "bool" {
[INFO] [stderr] 303 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 309 | |         false
[INFO] [stderr] 310 | |     }
[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] 300 |     if let syn::Type::Path(ref typep) = *ty {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this if-then-else expression returns a bool literal
[INFO] [stderr]    --> src/lib.rs:301:9
[INFO] [stderr]     |
[INFO] [stderr] 301 | /         if typep.qself.is_none() && typep.path.leading_colon.is_none() && typep.path.segments.len() == 1 &&
[INFO] [stderr] 302 | |             typep.path.segments[0].ident.as_ref() == "bool" {
[INFO] [stderr] 303 | |
[INFO] [stderr] 304 | |             true
[INFO] [stderr] 305 | |         } else {
[INFO] [stderr] 306 | |             false
[INFO] [stderr] 307 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stderr] help: you can reduce it to
[INFO] [stderr]     |
[INFO] [stderr] 301 |         typep.qself.is_none() && typep.path.leading_colon.is_none() && typep.path.segments.len() == 1 &&
[INFO] [stderr] 302 |             typep.path.segments[0].ident.as_ref() == "bool"
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 93
[INFO] [stderr]    --> src/lib.rs:314:1
[INFO] [stderr]     |
[INFO] [stderr] 314 | / pub fn bittwiddler(input: TokenStream) -> TokenStream {
[INFO] [stderr] 315 | |     let input: syn::DeriveInput = syn::parse(input).unwrap();
[INFO] [stderr] 316 | |
[INFO] [stderr] 317 | |     let main_bittwiddler_attribs = parse_multi_string_attr_helper(&input.attrs, "bittwiddler",
[INFO] [stderr] ...   |
[INFO] [stderr] 824 | |     all_tokens.into()
[INFO] [stderr] 825 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:335:28
[INFO] [stderr]     |
[INFO] [stderr] 335 |                         if bittwiddler_field_attrs.len() > 0 {
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!bittwiddler_field_attrs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:350:28
[INFO] [stderr]     |
[INFO] [stderr] 350 |                         if bittwiddler_field_attrs.len() > 0 {
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!bittwiddler_field_attrs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:368:16
[INFO] [stderr]     |
[INFO] [stderr] 368 |             if bittwiddler_field_attrs.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!bittwiddler_field_attrs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:399:44
[INFO] [stderr]     |
[INFO] [stderr] 399 |                 if errtype_tmp.starts_with("'") {
[INFO] [stderr]     |                                            ^^^ help: try using a char instead: `'''`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:400:47
[INFO] [stderr]     |
[INFO] [stderr] 400 |                     if !errtype_tmp.ends_with("'") {
[INFO] [stderr]     |                                               ^^^ help: try using a char instead: `'''`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:426:16
[INFO] [stderr]     |
[INFO] [stderr] 426 |             if field_locs.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `field_locs.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `bittwiddler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d7b19322f6baa248c1c921087b5fe41842e193b75a9750e16b70c2f0e916a3b4"`
[INFO] running `"docker" "rm" "-f" "d7b19322f6baa248c1c921087b5fe41842e193b75a9750e16b70c2f0e916a3b4"`
[INFO] [stdout] d7b19322f6baa248c1c921087b5fe41842e193b75a9750e16b70c2f0e916a3b4