[INFO] crate wal-rs 1.0.2 is already in cache
[INFO] extracting crate wal-rs 1.0.2 into work/ex/clippy-test-run/sources/stable/reg/wal-rs/1.0.2
[INFO] extracting crate wal-rs 1.0.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/wal-rs/1.0.2
[INFO] validating manifest of wal-rs-1.0.2 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 wal-rs-1.0.2 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 wal-rs-1.0.2
[INFO] removed 1 missing examples
[INFO] finished frobbing wal-rs-1.0.2
[INFO] frobbed toml for wal-rs-1.0.2 written to work/ex/clippy-test-run/sources/stable/reg/wal-rs/1.0.2/Cargo.toml
[INFO] started frobbing wal-rs-1.0.2
[INFO] removed 1 missing examples
[INFO] finished frobbing wal-rs-1.0.2
[INFO] frobbed toml for wal-rs-1.0.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/wal-rs/1.0.2/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 wal-rs-1.0.2 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/wal-rs/1.0.2:/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] 1b9c0015ab92f00620794c526cb8544fb751a63b342adba622f55bc657851f88
[INFO] running `"docker" "start" "-a" "1b9c0015ab92f00620794c526cb8544fb751a63b342adba622f55bc657851f88"`
[INFO] [stderr] warning: An explicit [[example]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other example targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a example target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/examples/wal.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a example target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autoexamples = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]     Checking wal-rs v1.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |             sequence: sequence,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `sequence`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |             fname: fname,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `fname`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |             file: file,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `file`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 70 |             entry_limit: entry_limit,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `entry_limit`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |             entry_number: entry_number,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `entry_number`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 |                     fname: fname,
[INFO] [stderr]    |                     ^^^^^^^^^^^^ help: replace it with: `fname`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             fname: fname,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `fname`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 sequence: sequence,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^ help: replace it with: `sequence`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:47:17
[INFO] [stderr]    |
[INFO] [stderr] 47 |                 read: read,
[INFO] [stderr]    |                 ^^^^^^^^^^ help: replace it with: `read`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |             cfg: cfg,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |             dir: dir,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `dir`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:66:13
[INFO] [stderr]    |
[INFO] [stderr] 66 |             cursor: cursor,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `cursor`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |             segments: segments,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `segments`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |             sequence: sequence,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `sequence`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |             fname: fname,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `fname`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |             file: file,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `file`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 70 |             entry_limit: entry_limit,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `entry_limit`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/segment/mod.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |             entry_number: entry_number,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `entry_number`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 |                     fname: fname,
[INFO] [stderr]    |                     ^^^^^^^^^^^^ help: replace it with: `fname`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             fname: fname,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `fname`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 sequence: sequence,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^ help: replace it with: `sequence`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/cursor.rs:47:17
[INFO] [stderr]    |
[INFO] [stderr] 47 |                 read: read,
[INFO] [stderr]    |                 ^^^^^^^^^^ help: replace it with: `read`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |             cfg: cfg,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |             dir: dir,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `dir`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:66:13
[INFO] [stderr]    |
[INFO] [stderr] 66 |             cursor: cursor,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `cursor`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/wal/mod.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |             segments: segments,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `segments`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/segment/overhead.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         return true;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: item `wal::WAL` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/wal/mod.rs:25:1
[INFO] [stderr]     |
[INFO] [stderr] 25  | / impl WAL {
[INFO] [stderr] 26  | |     /// Opens a wal with given dir.
[INFO] [stderr] 27  | |     pub fn open<S: AsRef<OsStr> + ?Sized>(dir: &S, cfg: Config) -> Result<WAL> {
[INFO] [stderr] 28  | |         let p = Path::new(dir);
[INFO] [stderr] ...   |
[INFO] [stderr] 190 | |     }
[INFO] [stderr] 191 | | }
[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: unneeded return statement
[INFO] [stderr]   --> src/segment/overhead.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         return true;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/segment/tests.rs:30:24
[INFO] [stderr]    |
[INFO] [stderr] 30 |         seq.write(&buf[..written + 1]).unwrap();
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ help: use: `..=written`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/segment/tests.rs:70:24
[INFO] [stderr]    |
[INFO] [stderr] 70 |         seq.write(&buf[..written + 1]).unwrap();
[INFO] [stderr]    |                        ^^^^^^^^^^^^^ help: use: `..=written`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/wal/tests.rs:26:50
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mut wal = WAL::open(&testhome.dir(), cfg.clone()).unwrap();
[INFO] [stderr]    |                                                  ^^^^^^^^^^^ help: try removing the `clone` call: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/wal/tests.rs:29:28
[INFO] [stderr]    |
[INFO] [stderr] 29 |             wal.write(&buf[..i + 1]).unwrap();
[INFO] [stderr]    |                            ^^^^^^^ help: use: `..=i`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/wal/tests.rs:34:37
[INFO] [stderr]    |
[INFO] [stderr] 34 |         assert_segment_exists(&dir, &vec![0, 1, 2], title);
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^ help: you can use a slice directly: `&[0, 1, 2]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_vec)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/wal/tests.rs:39:50
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let mut wal = WAL::open(&testhome.dir(), cfg.clone()).unwrap();
[INFO] [stderr]    |                                                  ^^^^^^^^^^^ help: try removing the `clone` call: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/wal/tests.rs:48:37
[INFO] [stderr]    |
[INFO] [stderr] 48 |         assert_segment_exists(&dir, &vec![0, 1, 2], title);
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^ help: you can use a slice directly: `&[0, 1, 2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/wal/tests.rs:53:50
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut wal = WAL::open(&testhome.dir(), cfg.clone()).unwrap();
[INFO] [stderr]    |                                                  ^^^^^^^^^^^ help: try removing the `clone` call: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/wal/tests.rs:62:37
[INFO] [stderr]    |
[INFO] [stderr] 62 |         assert_segment_exists(&dir, &vec![0, 1, 2], title);
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^ help: you can use a slice directly: `&[0, 1, 2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/wal/tests.rs:67:50
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut wal = WAL::open(&testhome.dir(), cfg.clone()).unwrap();
[INFO] [stderr]    |                                                  ^^^^^^^^^^^ help: try removing the `clone` call: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/wal/tests.rs:76:37
[INFO] [stderr]    |
[INFO] [stderr] 76 |         assert_segment_exists(&dir, &vec![1, 2], title);
[INFO] [stderr]    |                                     ^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/wal/tests.rs:81:50
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut wal = WAL::open(&testhome.dir(), cfg.clone()).unwrap();
[INFO] [stderr]    |                                                  ^^^^^^^^^^^ help: try removing the `clone` call: `cfg`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/wal/tests.rs:90:37
[INFO] [stderr]    |
[INFO] [stderr] 90 |         assert_segment_exists(&dir, &vec![2], title);
[INFO] [stderr]    |                                     ^^^^^^^^ help: you can use a slice directly: `&[2]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/wal/tests.rs:116:35
[INFO] [stderr]     |
[INFO] [stderr] 116 |     let mut wal = WAL::open(&dir, cfg.clone()).unwrap();
[INFO] [stderr]     |                                   ^^^^^^^^^^^ help: try removing the `clone` call: `cfg`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/wal/tests.rs:124:29
[INFO] [stderr]     |
[INFO] [stderr] 124 |             batch.push(&buf[0..i + 1]);
[INFO] [stderr]     |                             ^^^^^^^^ help: use: `0..=i`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: item `wal::WAL` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/wal/mod.rs:25:1
[INFO] [stderr]     |
[INFO] [stderr] 25  | / impl WAL {
[INFO] [stderr] 26  | |     /// Opens a wal with given dir.
[INFO] [stderr] 27  | |     pub fn open<S: AsRef<OsStr> + ?Sized>(dir: &S, cfg: Config) -> Result<WAL> {
[INFO] [stderr] 28  | |         let p = Path::new(dir);
[INFO] [stderr] ...   |
[INFO] [stderr] 190 | |     }
[INFO] [stderr] 191 | | }
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `"docker" "inspect" "1b9c0015ab92f00620794c526cb8544fb751a63b342adba622f55bc657851f88"`
[INFO] running `"docker" "rm" "-f" "1b9c0015ab92f00620794c526cb8544fb751a63b342adba622f55bc657851f88"`
[INFO] [stdout] 1b9c0015ab92f00620794c526cb8544fb751a63b342adba622f55bc657851f88