[INFO] crate sliding_extrema 0.1.2 is already in cache
[INFO] extracting crate sliding_extrema 0.1.2 into work/ex/clippy-test-run/sources/stable/reg/sliding_extrema/0.1.2
[INFO] extracting crate sliding_extrema 0.1.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/sliding_extrema/0.1.2
[INFO] validating manifest of sliding_extrema-0.1.2 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 sliding_extrema-0.1.2 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 sliding_extrema-0.1.2
[INFO] finished frobbing sliding_extrema-0.1.2
[INFO] frobbed toml for sliding_extrema-0.1.2 written to work/ex/clippy-test-run/sources/stable/reg/sliding_extrema/0.1.2/Cargo.toml
[INFO] started frobbing sliding_extrema-0.1.2
[INFO] finished frobbing sliding_extrema-0.1.2
[INFO] frobbed toml for sliding_extrema-0.1.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/sliding_extrema/0.1.2/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 sliding_extrema-0.1.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/sliding_extrema/0.1.2:/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] c9ea0fb89626bc989b61511f84ba7c06197c472e55ca052a4e2c38bbf41e1fe7
[INFO] running `"docker" "start" "-a" "c9ea0fb89626bc989b61511f84ba7c06197c472e55ca052a4e2c38bbf41e1fe7"`
[INFO] [stderr]     Checking sliding_extrema v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if self.data.len()==0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.data.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] warning: item `SlidingExtrema<T, F>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/lib.rs:77:1
[INFO] [stderr]     |
[INFO] [stderr] 77  | / impl<T:Clone,F:Fn(&T,&T) -> T> SlidingExtrema<T,F> {
[INFO] [stderr] 78  | |
[INFO] [stderr] 79  | |     pub fn new(f:F) -> SlidingExtrema<T,F> {
[INFO] [stderr] 80  | |         SlidingExtrema {
[INFO] [stderr] ...   |
[INFO] [stderr] 117 | |     
[INFO] [stderr] 118 | | }
[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 `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:151:20
[INFO] [stderr]     |
[INFO] [stderr] 151 |               } else {
[INFO] [stderr]     |  ____________________^
[INFO] [stderr] 152 | |                 if b.len() > 0 {
[INFO] [stderr] 153 | |                     assert_eq!(a.get_extrema().unwrap(), b.iter().fold(10000,|a,b|a.min(*b)));    
[INFO] [stderr] 154 | |                     let bpop = b.remove(0);
[INFO] [stderr] ...   |
[INFO] [stderr] 160 | |                 }
[INFO] [stderr] 161 | |             }
[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] 151 |             } else if b.len() > 0 {
[INFO] [stderr] 152 |     assert_eq!(a.get_extrema().unwrap(), b.iter().fold(10000,|a,b|a.min(*b)));    
[INFO] [stderr] 153 |     let bpop = b.remove(0);
[INFO] [stderr] 154 |     assert_eq!(a.pop().unwrap(),bpop);
[INFO] [stderr] 155 |     
[INFO] [stderr] 156 | } else {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if self.data.len()==0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.data.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] warning: item `SlidingExtrema<T, F>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/lib.rs:77:1
[INFO] [stderr]     |
[INFO] [stderr] 77  | / impl<T:Clone,F:Fn(&T,&T) -> T> SlidingExtrema<T,F> {
[INFO] [stderr] 78  | |
[INFO] [stderr] 79  | |     pub fn new(f:F) -> SlidingExtrema<T,F> {
[INFO] [stderr] 80  | |         SlidingExtrema {
[INFO] [stderr] ...   |
[INFO] [stderr] 117 | |     
[INFO] [stderr] 118 | | }
[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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:152:20
[INFO] [stderr]     |
[INFO] [stderr] 152 |                 if b.len() > 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!b.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]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "c9ea0fb89626bc989b61511f84ba7c06197c472e55ca052a4e2c38bbf41e1fe7"`
[INFO] running `"docker" "rm" "-f" "c9ea0fb89626bc989b61511f84ba7c06197c472e55ca052a4e2c38bbf41e1fe7"`
[INFO] [stdout] c9ea0fb89626bc989b61511f84ba7c06197c472e55ca052a4e2c38bbf41e1fe7