[INFO] updating cached repository klnusbaum/bintree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/klnusbaum/bintree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/klnusbaum/bintree" "work/ex/clippy-test-run/sources/stable/gh/klnusbaum/bintree"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/klnusbaum/bintree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/klnusbaum/bintree" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/klnusbaum/bintree"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/klnusbaum/bintree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 99eb2a05744b80bad6f4721f2861b97e1a7d70b4
[INFO] sha for GitHub repo klnusbaum/bintree: 99eb2a05744b80bad6f4721f2861b97e1a7d70b4
[INFO] validating manifest of klnusbaum/bintree 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 klnusbaum/bintree 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 klnusbaum/bintree
[INFO] finished frobbing klnusbaum/bintree
[INFO] frobbed toml for klnusbaum/bintree written to work/ex/clippy-test-run/sources/stable/gh/klnusbaum/bintree/Cargo.toml
[INFO] started frobbing klnusbaum/bintree
[INFO] finished frobbing klnusbaum/bintree
[INFO] frobbed toml for klnusbaum/bintree written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/klnusbaum/bintree/Cargo.toml
[INFO] crate klnusbaum/bintree has a lockfile. skipping
[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 klnusbaum/bintree against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/klnusbaum/bintree:/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] b096b47e02ac7fcaa8717f8aebca2f68b6a1d7e1bb02cad5345779c1fdaf5060
[INFO] running `"docker" "start" "-a" "b096b47e02ac7fcaa8717f8aebca2f68b6a1d7e1bb02cad5345779c1fdaf5060"`
[INFO] [stderr]     Checking bintree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]   --> src/lib.rs:91:19
[INFO] [stderr]    |
[INFO] [stderr] 91 |         } else if key < &self.key {
[INFO] [stderr]    |                   ^^^^^^---------
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: use the right value directly: `self.key`
[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] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `BinaryTree<K, V>`
[INFO] [stderr]    --> src/lib.rs:135:5
[INFO] [stderr]     |
[INFO] [stderr] 135 | /     pub fn new() -> BinaryTree<K,V> {
[INFO] [stderr] 136 | |         BinaryTree{
[INFO] [stderr] 137 | |             root: None,
[INFO] [stderr] 138 | |         }
[INFO] [stderr] 139 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 129 | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/lib.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 | /         if self.root.is_none() {
[INFO] [stderr] 159 | |             return None;
[INFO] [stderr] 160 | |         }
[INFO] [stderr]     | |_________^ help: replace_it_with: `self.root?;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/lib.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 | /         match self.root {
[INFO] [stderr] 174 | |             None => true,
[INFO] [stderr] 175 | |             Some(_) => false,
[INFO] [stderr] 176 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.root.is_none()`
[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: taken reference of right operand
[INFO] [stderr]   --> src/lib.rs:91:19
[INFO] [stderr]    |
[INFO] [stderr] 91 |         } else if key < &self.key {
[INFO] [stderr]    |                   ^^^^^^---------
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: use the right value directly: `self.key`
[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] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `BinaryTree<K, V>`
[INFO] [stderr]    --> src/lib.rs:135:5
[INFO] [stderr]     |
[INFO] [stderr] 135 | /     pub fn new() -> BinaryTree<K,V> {
[INFO] [stderr] 136 | |         BinaryTree{
[INFO] [stderr] 137 | |             root: None,
[INFO] [stderr] 138 | |         }
[INFO] [stderr] 139 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 129 | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/lib.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 | /         if self.root.is_none() {
[INFO] [stderr] 159 | |             return None;
[INFO] [stderr] 160 | |         }
[INFO] [stderr]     | |_________^ help: replace_it_with: `self.root?;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/lib.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 | /         match self.root {
[INFO] [stderr] 174 | |             None => true,
[INFO] [stderr] 175 | |             Some(_) => false,
[INFO] [stderr] 176 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.root.is_none()`
[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 0.57s
[INFO] running `"docker" "inspect" "b096b47e02ac7fcaa8717f8aebca2f68b6a1d7e1bb02cad5345779c1fdaf5060"`
[INFO] running `"docker" "rm" "-f" "b096b47e02ac7fcaa8717f8aebca2f68b6a1d7e1bb02cad5345779c1fdaf5060"`
[INFO] [stdout] b096b47e02ac7fcaa8717f8aebca2f68b6a1d7e1bb02cad5345779c1fdaf5060