[INFO] crate unicode-bom 1.1.3 is already in cache
[INFO] extracting crate unicode-bom 1.1.3 into work/ex/clippy-test-run/sources/stable/reg/unicode-bom/1.1.3
[INFO] extracting crate unicode-bom 1.1.3 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/unicode-bom/1.1.3
[INFO] validating manifest of unicode-bom-1.1.3 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 unicode-bom-1.1.3 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 unicode-bom-1.1.3
[INFO] finished frobbing unicode-bom-1.1.3
[INFO] frobbed toml for unicode-bom-1.1.3 written to work/ex/clippy-test-run/sources/stable/reg/unicode-bom/1.1.3/Cargo.toml
[INFO] started frobbing unicode-bom-1.1.3
[INFO] finished frobbing unicode-bom-1.1.3
[INFO] frobbed toml for unicode-bom-1.1.3 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/unicode-bom/1.1.3/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 unicode-bom-1.1.3 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/unicode-bom/1.1.3:/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] 352ca35902264d67eeb49b1ced859613e26bdab323d5653ecb435d71898dc35c
[INFO] running `"docker" "start" "-a" "352ca35902264d67eeb49b1ced859613e26bdab323d5653ecb435d71898dc35c"`
[INFO] [stderr]     Checking unicode-bom v1.1.3 (/opt/crater/workdir)
[INFO] [stderr] warning: item `Bom` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/lib.rs:91:1
[INFO] [stderr]     |
[INFO] [stderr] 91  | / impl Bom {
[INFO] [stderr] 92  | |     /// Returns the size in bytes of the BOM.
[INFO] [stderr] 93  | |     pub fn len(&self) -> usize {
[INFO] [stderr] 94  | |         match *self {
[INFO] [stderr] ...   |
[INFO] [stderr] 108 | |     }
[INFO] [stderr] 109 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:93:16
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn len(&self) -> usize {
[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: the function has a cyclomatic complexity of 64
[INFO] [stderr]    --> src/test.rs:66:1
[INFO] [stderr]     |
[INFO] [stderr] 66  | / fn from_slice() {
[INFO] [stderr] 67  | |     assert_bom!([], Null);
[INFO] [stderr] 68  | |
[INFO] [stderr] 69  | |     assert_bom!([0, 0, 0xfe], Null);
[INFO] [stderr] ...   |
[INFO] [stderr] 142 | |     assert_bom!([0xff, 0xfe, 0, 1, 42], Utf16Le);
[INFO] [stderr] 143 | | }
[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: item `Bom` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/lib.rs:91:1
[INFO] [stderr]     |
[INFO] [stderr] 91  | / impl Bom {
[INFO] [stderr] 92  | |     /// Returns the size in bytes of the BOM.
[INFO] [stderr] 93  | |     pub fn len(&self) -> usize {
[INFO] [stderr] 94  | |         match *self {
[INFO] [stderr] ...   |
[INFO] [stderr] 108 | |     }
[INFO] [stderr] 109 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:93:16
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn len(&self) -> usize {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "352ca35902264d67eeb49b1ced859613e26bdab323d5653ecb435d71898dc35c"`
[INFO] running `"docker" "rm" "-f" "352ca35902264d67eeb49b1ced859613e26bdab323d5653ecb435d71898dc35c"`
[INFO] [stdout] 352ca35902264d67eeb49b1ced859613e26bdab323d5653ecb435d71898dc35c