[INFO] updating cached repository shakyShane/rs-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shakyShane/rs-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shakyShane/rs-playground" "work/ex/clippy-test-run/sources/stable/gh/shakyShane/rs-playground"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/shakyShane/rs-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shakyShane/rs-playground" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/shakyShane/rs-playground"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/shakyShane/rs-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 616c25b008485e7b5e315f1b989ec26278ea6331
[INFO] sha for GitHub repo shakyShane/rs-playground: 616c25b008485e7b5e315f1b989ec26278ea6331
[INFO] validating manifest of shakyShane/rs-playground 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 shakyShane/rs-playground 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 shakyShane/rs-playground
[INFO] finished frobbing shakyShane/rs-playground
[INFO] frobbed toml for shakyShane/rs-playground written to work/ex/clippy-test-run/sources/stable/gh/shakyShane/rs-playground/Cargo.toml
[INFO] started frobbing shakyShane/rs-playground
[INFO] finished frobbing shakyShane/rs-playground
[INFO] frobbed toml for shakyShane/rs-playground written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/shakyShane/rs-playground/Cargo.toml
[INFO] crate shakyShane/rs-playground 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 shakyShane/rs-playground against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/shakyShane/rs-playground:/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] abe002b6db81b76b9a5e8b3dcd7088c8c07c6e576db3f5dc952c9960a69e09ce
[INFO] running `"docker" "start" "-a" "abe002b6db81b76b9a5e8b3dcd7088c8c07c6e576db3f5dc952c9960a69e09ce"`
[INFO] [stderr]     Checking memchr v2.0.2
[INFO] [stderr]     Checking serde_json v1.0.27
[INFO] [stderr]     Checking serde_yaml v0.8.4
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]    Compiling from_file_derive v0.1.3
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking regex v1.0.5
[INFO] [stderr]     Checking from_file v0.1.3
[INFO] [stderr]     Checking rs-playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/fold.rs:20:56
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn collect<'a>(items: &'a mut Vec<Node>, children: &Vec<Item>) -> &'a mut Vec<Node> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^ help: change this to: `&[Item]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: this call to `as_ref` does nothing
[INFO] [stderr]   --> src/hash_map.rs:26:15
[INFO] [stderr]    |
[INFO] [stderr] 26 |         match t.as_ref() {
[INFO] [stderr]    |               ^^^^^^^^^^ help: try this: `t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_asref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_asref
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/hash_map.rs:41:20
[INFO] [stderr]    |
[INFO] [stderr] 41 |         assert_eq!(m.get(&index).unwrap().greet(), "hi shane");
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&m[&index]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]  --> src/collect_collections.rs:7:23
[INFO] [stderr]   |
[INFO] [stderr] 7 |         if w.contains("a") {
[INFO] [stderr]   |                       ^^^ help: try using a char instead: `'a'`
[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/collect_collections.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 |     if w.contains("a") {
[INFO] [stderr]    |                   ^^^ help: try using a char instead: `'a'`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/fold.rs:20:56
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn collect<'a>(items: &'a mut Vec<Node>, children: &Vec<Item>) -> &'a mut Vec<Node> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^ help: change this to: `&[Item]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: this call to `as_ref` does nothing
[INFO] [stderr]   --> src/hash_map.rs:26:15
[INFO] [stderr]    |
[INFO] [stderr] 26 |         match t.as_ref() {
[INFO] [stderr]    |               ^^^^^^^^^^ help: try this: `t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_asref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_asref
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/hash_map.rs:41:20
[INFO] [stderr]    |
[INFO] [stderr] 41 |         assert_eq!(m.get(&index).unwrap().greet(), "hi shane");
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&m[&index]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]  --> src/collect_collections.rs:7:23
[INFO] [stderr]   |
[INFO] [stderr] 7 |         if w.contains("a") {
[INFO] [stderr]   |                       ^^^ help: try using a char instead: `'a'`
[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/collect_collections.rs:17:19
[INFO] [stderr]    |
[INFO] [stderr] 17 |     if w.contains("a") {
[INFO] [stderr]    |                   ^^^ help: try using a char instead: `'a'`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 17.67s
[INFO] running `"docker" "inspect" "abe002b6db81b76b9a5e8b3dcd7088c8c07c6e576db3f5dc952c9960a69e09ce"`
[INFO] running `"docker" "rm" "-f" "abe002b6db81b76b9a5e8b3dcd7088c8c07c6e576db3f5dc952c9960a69e09ce"`
[INFO] [stdout] abe002b6db81b76b9a5e8b3dcd7088c8c07c6e576db3f5dc952c9960a69e09ce