[INFO] crate subsrch 0.1.0 is already in cache
[INFO] extracting crate subsrch 0.1.0 into work/ex/clippy-test-run/sources/stable/reg/subsrch/0.1.0
[INFO] extracting crate subsrch 0.1.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/subsrch/0.1.0
[INFO] validating manifest of subsrch-0.1.0 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 subsrch-0.1.0 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 subsrch-0.1.0
[INFO] finished frobbing subsrch-0.1.0
[INFO] frobbed toml for subsrch-0.1.0 written to work/ex/clippy-test-run/sources/stable/reg/subsrch/0.1.0/Cargo.toml
[INFO] started frobbing subsrch-0.1.0
[INFO] finished frobbing subsrch-0.1.0
[INFO] frobbed toml for subsrch-0.1.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/subsrch/0.1.0/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 subsrch-0.1.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/subsrch/0.1.0:/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] 3562a5c58d22834f9c91f3a44f5cbe0563e1fff60757e521da493b5f33f6a440
[INFO] running `"docker" "start" "-a" "3562a5c58d22834f9c91f3a44f5cbe0563e1fff60757e521da493b5f33f6a440"`
[INFO] [stderr]     Checking subsrch v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         set![]
[INFO] [stderr]    |         ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         set![]
[INFO] [stderr]    |         ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:20:42
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_includes: Vec<_> = once(set![])
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:20:42
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_includes: Vec<_> = once(set![])
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:20:41
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_rejects: Vec<_> = once(set![])
[INFO] [stderr]    |                                         ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:20:41
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_rejects: Vec<_> = once(set![])
[INFO] [stderr]    |                                         ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         result
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |           let result = BufReader::new(stdin.lock())
[INFO] [stderr]    |  ______________________^
[INFO] [stderr] 50 | |             .lines()
[INFO] [stderr] 51 | |             .collect::<Result<Vec<_>>>()
[INFO] [stderr] 52 | |             .expect("failed to read from stdin");
[INFO] [stderr]    | |________________________________________________^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         set![]
[INFO] [stderr]    |         ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         set![]
[INFO] [stderr]    |         ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:20:42
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_includes: Vec<_> = once(set![])
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:20:42
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_includes: Vec<_> = once(set![])
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:52:42
[INFO] [stderr]    |
[INFO] [stderr] 52 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:52:42
[INFO] [stderr]    |
[INFO] [stderr] 52 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:59:27
[INFO] [stderr]    |
[INFO] [stderr] 59 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:59:27
[INFO] [stderr]    |
[INFO] [stderr] 59 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:67:27
[INFO] [stderr]    |
[INFO] [stderr] 67 |         range.test_passed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:67:27
[INFO] [stderr]    |
[INFO] [stderr] 67 |         range.test_passed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:68:44
[INFO] [stderr]    |
[INFO] [stderr] 68 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]    |                                            ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:68:44
[INFO] [stderr]    |
[INFO] [stderr] 68 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]    |                                            ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:75:42
[INFO] [stderr]    |
[INFO] [stderr] 75 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:75:42
[INFO] [stderr]    |
[INFO] [stderr] 75 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:82:27
[INFO] [stderr]    |
[INFO] [stderr] 82 |         range.test_passed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:82:27
[INFO] [stderr]    |
[INFO] [stderr] 82 |         range.test_passed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:84:44
[INFO] [stderr]    |
[INFO] [stderr] 84 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]    |                                            ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:84:44
[INFO] [stderr]    |
[INFO] [stderr] 84 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]    |                                            ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:99:27
[INFO] [stderr]    |
[INFO] [stderr] 99 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/maximal.rs:99:27
[INFO] [stderr]    |
[INFO] [stderr] 99 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/main.rs:10:9
[INFO] [stderr]     |
[INFO] [stderr] 10  |         s
[INFO] [stderr]     |         ^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/maximal.rs:116:27
[INFO] [stderr]     |
[INFO] [stderr] 116 |         range.test_passed(set![]);
[INFO] [stderr]     |                           ------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/main.rs:8:21
[INFO] [stderr]     |
[INFO] [stderr] 8   |         let mut s = HashSet::new();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/maximal.rs:116:27
[INFO] [stderr]     |
[INFO] [stderr] 116 |         range.test_passed(set![]);
[INFO] [stderr]     |                           ------ in this macro invocation
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/main.rs:10:9
[INFO] [stderr]     |
[INFO] [stderr] 10  |         s
[INFO] [stderr]     |         ^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/maximal.rs:135:27
[INFO] [stderr]     |
[INFO] [stderr] 135 |         range.test_passed(set![]);
[INFO] [stderr]     |                           ------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/main.rs:8:21
[INFO] [stderr]     |
[INFO] [stderr] 8   |         let mut s = HashSet::new();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/maximal.rs:135:27
[INFO] [stderr]     |
[INFO] [stderr] 135 |         range.test_passed(set![]);
[INFO] [stderr]     |                           ------ in this macro invocation
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:20:41
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_rejects: Vec<_> = once(set![])
[INFO] [stderr]    |                                         ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:20:41
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let past_rejects: Vec<_> = once(set![])
[INFO] [stderr]    |                                         ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:48:42
[INFO] [stderr]    |
[INFO] [stderr] 48 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:48:42
[INFO] [stderr]    |
[INFO] [stderr] 48 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:55:27
[INFO] [stderr]    |
[INFO] [stderr] 55 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:55:27
[INFO] [stderr]    |
[INFO] [stderr] 55 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:63:27
[INFO] [stderr]    |
[INFO] [stderr] 63 |         range.test_passed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:63:27
[INFO] [stderr]    |
[INFO] [stderr] 63 |         range.test_passed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:64:44
[INFO] [stderr]    |
[INFO] [stderr] 64 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]    |                                            ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:64:44
[INFO] [stderr]    |
[INFO] [stderr] 64 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]    |                                            ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:87:42
[INFO] [stderr]    |
[INFO] [stderr] 87 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:87:42
[INFO] [stderr]    |
[INFO] [stderr] 87 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]    |                                          ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |         s
[INFO] [stderr]    |         ^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:95:27
[INFO] [stderr]    |
[INFO] [stderr] 95 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:8:21
[INFO] [stderr]    |
[INFO] [stderr] 8  |         let mut s = HashSet::new();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/minimal.rs:95:27
[INFO] [stderr]    |
[INFO] [stderr] 95 |         range.test_failed(set![]);
[INFO] [stderr]    |                           ------ in this macro invocation
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/main.rs:10:9
[INFO] [stderr]     |
[INFO] [stderr] 10  |         s
[INFO] [stderr]     |         ^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/minimal.rs:103:27
[INFO] [stderr]     |
[INFO] [stderr] 103 |         range.test_passed(set![]);
[INFO] [stderr]     |                           ------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/main.rs:8:21
[INFO] [stderr]     |
[INFO] [stderr] 8   |         let mut s = HashSet::new();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/minimal.rs:103:27
[INFO] [stderr]     |
[INFO] [stderr] 103 |         range.test_passed(set![]);
[INFO] [stderr]     |                           ------ in this macro invocation
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/main.rs:10:9
[INFO] [stderr]     |
[INFO] [stderr] 10  |         s
[INFO] [stderr]     |         ^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/minimal.rs:104:44
[INFO] [stderr]     |
[INFO] [stderr] 104 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]     |                                            ------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/main.rs:8:21
[INFO] [stderr]     |
[INFO] [stderr] 8   |         let mut s = HashSet::new();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/minimal.rs:104:44
[INFO] [stderr]     |
[INFO] [stderr] 104 |         assert_eq!(range.next(), Done(Some(set![])));
[INFO] [stderr]     |                                            ------ in this macro invocation
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/main.rs:10:9
[INFO] [stderr]     |
[INFO] [stderr] 10  |         s
[INFO] [stderr]     |         ^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/minimal.rs:140:42
[INFO] [stderr]     |
[INFO] [stderr] 140 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]     |                                          ------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/main.rs:8:21
[INFO] [stderr]     |
[INFO] [stderr] 8   |         let mut s = HashSet::new();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/minimal.rs:140:42
[INFO] [stderr]     |
[INFO] [stderr] 140 |         assert_eq!(range.next(), RunTest(set![]));
[INFO] [stderr]     |                                          ------ in this macro invocation
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         result
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |           let result = BufReader::new(stdin.lock())
[INFO] [stderr]    |  ______________________^
[INFO] [stderr] 50 | |             .lines()
[INFO] [stderr] 51 | |             .collect::<Result<Vec<_>>>()
[INFO] [stderr] 52 | |             .expect("failed to read from stdin");
[INFO] [stderr]    | |________________________________________________^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]   --> src/maximal.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 | /         potential_includes
[INFO] [stderr] 38 | |             .filter(|i| !past_includes.contains(i))
[INFO] [stderr] 39 | |             .next()
[INFO] [stderr]    | |___________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]    = note: replace `filter(|i| !past_includes.contains(i)).next()` with `find(|i| !past_includes.contains(i))`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]   --> src/minimal.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         potential_rejects
[INFO] [stderr] 34 | |             .filter(|r| !past_rejects.contains(r))
[INFO] [stderr] 35 | |             .next()
[INFO] [stderr]    | |___________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: replace `filter(|r| !past_rejects.contains(r)).next()` with `find(|r| !past_rejects.contains(r))`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]   --> src/maximal.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 | /         potential_includes
[INFO] [stderr] 38 | |             .filter(|i| !past_includes.contains(i))
[INFO] [stderr] 39 | |             .next()
[INFO] [stderr]    | |___________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]    = note: replace `filter(|i| !past_includes.contains(i)).next()` with `find(|i| !past_includes.contains(i))`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]   --> src/minimal.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         potential_rejects
[INFO] [stderr] 34 | |             .filter(|r| !past_rejects.contains(r))
[INFO] [stderr] 35 | |             .next()
[INFO] [stderr]    | |___________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: replace `filter(|r| !past_rejects.contains(r)).next()` with `find(|r| !past_rejects.contains(r))`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.90s
[INFO] running `"docker" "inspect" "3562a5c58d22834f9c91f3a44f5cbe0563e1fff60757e521da493b5f33f6a440"`
[INFO] running `"docker" "rm" "-f" "3562a5c58d22834f9c91f3a44f5cbe0563e1fff60757e521da493b5f33f6a440"`
[INFO] [stdout] 3562a5c58d22834f9c91f3a44f5cbe0563e1fff60757e521da493b5f33f6a440