[INFO] crate gray-codes 0.1.1 is already in cache
[INFO] extracting crate gray-codes 0.1.1 into work/ex/clippy-test-run/sources/stable/reg/gray-codes/0.1.1
[INFO] extracting crate gray-codes 0.1.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/gray-codes/0.1.1
[INFO] validating manifest of gray-codes-0.1.1 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 gray-codes-0.1.1 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 gray-codes-0.1.1
[INFO] finished frobbing gray-codes-0.1.1
[INFO] frobbed toml for gray-codes-0.1.1 written to work/ex/clippy-test-run/sources/stable/reg/gray-codes/0.1.1/Cargo.toml
[INFO] started frobbing gray-codes-0.1.1
[INFO] finished frobbing gray-codes-0.1.1
[INFO] frobbed toml for gray-codes-0.1.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/gray-codes/0.1.1/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 gray-codes-0.1.1 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-6/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/gray-codes/0.1.1:/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] e8e22011047ab4243613be5691d604c66828c1de91d4cc8dfb7e3b275deadd0b
[INFO] running `"docker" "start" "-a" "e8e22011047ab4243613be5691d604c66828c1de91d4cc8dfb7e3b275deadd0b"`
[INFO] [stderr]     Checking gray-codes v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:446:13
[INFO] [stderr]     |
[INFO] [stderr] 446 |             items: items,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `items`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:446:13
[INFO] [stderr]     |
[INFO] [stderr] 446 |             items: items,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `items`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:468:9
[INFO] [stderr]     |
[INFO] [stderr] 468 |         return ret;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: remove `return` as shown: `ret`
[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] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:468:9
[INFO] [stderr]     |
[INFO] [stderr] 468 |         return ret;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: remove `return` as shown: `ret`
[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] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 216 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u8 values"]
[INFO] [stderr] 217 | |                 GrayCode8, u8, 8, gray_code_8, 8);
[INFO] [stderr]     | |__________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 218 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u16 values"]
[INFO] [stderr] 219 | |                 GrayCode16, u16, 16, gray_code_16, 10);
[INFO] [stderr]     | |_______________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 220 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u32 values"]
[INFO] [stderr] 221 | |                 GrayCode32, u32, 32, gray_code_32, 11);
[INFO] [stderr]     | |_______________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 222 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u64 values"]
[INFO] [stderr] 223 | |                 GrayCode64, u64, 64, gray_code_64, 12);
[INFO] [stderr]     | |_______________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/lib.rs:458:16
[INFO] [stderr]     |
[INFO] [stderr] 458 |           if let Some(_) = self.inc_ex.next() {
[INFO] [stderr]     |  _________-      ^^^^^^^
[INFO] [stderr] 459 | |             let collection = self.inc_ex.current_set.iter().enumerate().flat_map(|(i,&b)| {
[INFO] [stderr] 460 | |                 if b {
[INFO] [stderr] 461 | |                     Some(&self.items[i])
[INFO] [stderr] ...   |
[INFO] [stderr] 466 | |             self.next = Some(collection);
[INFO] [stderr] 467 | |         }
[INFO] [stderr]     | |_________- help: try this: `if self.inc_ex.next().is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 216 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u8 values"]
[INFO] [stderr] 217 | |                 GrayCode8, u8, 8, gray_code_8, 8);
[INFO] [stderr]     | |__________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 218 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u16 values"]
[INFO] [stderr] 219 | |                 GrayCode16, u16, 16, gray_code_16, 10);
[INFO] [stderr]     | |_______________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 220 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u32 values"]
[INFO] [stderr] 221 | |                 GrayCode32, u32, 32, gray_code_32, 11);
[INFO] [stderr]     | |_______________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/lib.rs:130:29
[INFO] [stderr]     |
[INFO] [stderr] 130 |               pub fn to_index(code: $uint_ty) -> $uint_ty {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 222 | / gray_code_impl!(#[doc="Iterator over binary reflected Gray codes as u64 values"]
[INFO] [stderr] 223 | |                 GrayCode64, u64, 64, gray_code_64, 12);
[INFO] [stderr]     | |_______________________________________________________- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/lib.rs:458:16
[INFO] [stderr]     |
[INFO] [stderr] 458 |           if let Some(_) = self.inc_ex.next() {
[INFO] [stderr]     |  _________-      ^^^^^^^
[INFO] [stderr] 459 | |             let collection = self.inc_ex.current_set.iter().enumerate().flat_map(|(i,&b)| {
[INFO] [stderr] 460 | |                 if b {
[INFO] [stderr] 461 | |                     Some(&self.items[i])
[INFO] [stderr] ...   |
[INFO] [stderr] 466 | |             self.next = Some(collection);
[INFO] [stderr] 467 | |         }
[INFO] [stderr]     | |_________- help: try this: `if self.inc_ex.next().is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "e8e22011047ab4243613be5691d604c66828c1de91d4cc8dfb7e3b275deadd0b"`
[INFO] running `"docker" "rm" "-f" "e8e22011047ab4243613be5691d604c66828c1de91d4cc8dfb7e3b275deadd0b"`
[INFO] [stdout] e8e22011047ab4243613be5691d604c66828c1de91d4cc8dfb7e3b275deadd0b