[INFO] cloning repository https://github.com/dmyTRUEk/levenshtein-distance-game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dmyTRUEk/levenshtein-distance-game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdmyTRUEk%2Flevenshtein-distance-game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdmyTRUEk%2Flevenshtein-distance-game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 482ed5937a77ec45ccca96a8290bd298244b3f2b
[INFO] linting dmyTRUEk/levenshtein-distance-game against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FdmyTRUEk%2Flevenshtein-distance-game" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/dmyTRUEk/levenshtein-distance-game
[INFO] finished tweaking git repo https://github.com/dmyTRUEk/levenshtein-distance-game
[INFO] tweaked toml for git repo https://github.com/dmyTRUEk/levenshtein-distance-game written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dmyTRUEk/levenshtein-distance-game on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dmyTRUEk/levenshtein-distance-game already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v4.5.20
[INFO] [stderr]   Downloaded anstream v0.6.17
[INFO] [stderr]   Downloaded clap_builder v4.5.20
[INFO] [stderr]   Downloaded libc v0.2.162
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04cef8082979e554ab8895510d74cd731cd4c1ff893ef2d212f6a5aac598936a
[INFO] running `Command { std: "docker" "start" "-a" "04cef8082979e554ab8895510d74cd731cd4c1ff893ef2d212f6a5aac598936a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04cef8082979e554ab8895510d74cd731cd4c1ff893ef2d212f6a5aac598936a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04cef8082979e554ab8895510d74cd731cd4c1ff893ef2d212f6a5aac598936a", kill_on_drop: false }`
[INFO] [stdout] 04cef8082979e554ab8895510d74cd731cd4c1ff893ef2d212f6a5aac598936a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f58ed73032257454321ca6e3e0a4831cf1a2ff70a1cdf5b2e8ac4e8d953c67a8
[INFO] running `Command { std: "docker" "start" "-a" "f58ed73032257454321ca6e3e0a4831cf1a2ff70a1cdf5b2e8ac4e8d953c67a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.162
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking clap_lex v0.7.2
[INFO] [stderr]     Checking anstream v0.6.17
[INFO] [stderr]     Checking clap_builder v4.5.20
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking clap v4.5.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking levenshtein-distance-game v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `arg`
[INFO] [stdout]   --> src/main.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 | use clap::{Parser, arg};
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let_chains,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `random_action_index` is never read
[INFO] [stdout]    --> src/main.rs:720:4
[INFO] [stdout]     |
[INFO] [stdout] 720 | /             #[allow(unused_assignments)]
[INFO] [stdout] 721 | |             random_action_index -= 1;
[INFO] [stdout]     | |____________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.into_iter()` call is equivalent to `.iter()` and will not consume the `slice`
[INFO] [stdout]    --> src/main.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |         assert!(chars.into_iter().all(|&c| alphabet.contains(c)));
[INFO] [stdout]     |                       ^^^^^^^^^ help: call directly: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stdout]     = note: `#[warn(clippy::into_iter_on_ref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: implementation of inherent method `to_string(&self) -> String` for type `Word<A>`
[INFO] [stdout]    --> src/main.rs:448:2
[INFO] [stdout]     |
[INFO] [stdout] 448 | /     fn to_string(&self) -> String {
[INFO] [stdout] 449 | |         self.chars.iter().collect()
[INFO] [stdout] 450 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: implement trait `Display` for type `Word<A>` instead
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string
[INFO] [stdout]     = note: `#[warn(clippy::inherent_to_string)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:487:8
[INFO] [stdout]     |
[INFO] [stdout] 487 |                 if !(index_start <= index_end) { return false }
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(index_start > index_end)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:493:8
[INFO] [stdout]     |
[INFO] [stdout] 493 |                 if !(index_start <= index_end) { return false }
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(index_start > index_end)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:500:8
[INFO] [stdout]     |
[INFO] [stdout] 500 |                 if !(index_start + 1 < index_end) { return false }
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(index_start + 1 >= index_end)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `arg`
[INFO] [stdout]   --> src/main.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 | use clap::{Parser, arg};
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `map(..).flatten()` on `Iterator`
[INFO] [stdout]    --> src/main.rs:539:7
[INFO] [stdout]     |
[INFO] [stdout] 539 |                       .map(|p| p.iter().map(|&c| c))
[INFO] [stdout]     |  ______________________^
[INFO] [stdout] 540 | |                     .flatten()
[INFO] [stdout]     | |______________________________^ help: try replacing `map` with `flat_map` and remove the `.flatten()`: `flat_map(|p| p.iter().map(|&c| c))`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_flatten
[INFO] [stdout]     = note: `#[warn(clippy::map_flatten)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for copying elements
[INFO] [stdout]    --> src/main.rs:539:15
[INFO] [stdout]     |
[INFO] [stdout] 539 |                     .map(|p| p.iter().map(|&c| c))
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `p.iter().copied()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout]     = note: `#[warn(clippy::map_clone)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:747:44
[INFO] [stdout]     |
[INFO] [stdout] 747 |     if word1.len() == 0 || word2.len() == 0 { return (0, 0).into() }
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 747 -     if word1.len() == 0 || word2.len() == 0 { return (0, 0).into() }
[INFO] [stdout] 747 +     if word1.len() == 0 || word2.len() == 0 { (0, 0).into() }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:749:3
[INFO] [stdout]     |
[INFO] [stdout] 749 | /         return (1, 0) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 750 | |             &word1.dropped_first(),
[INFO] [stdout] 751 | |             &word2.dropped_first(),
[INFO] [stdout] 752 | |         )
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 749 ~         (1, 0) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 750 ~             &word1.dropped_first(),
[INFO] [stdout] 751 ~             &word2.dropped_first(),
[INFO] [stdout] 752 ~         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:755:3
[INFO] [stdout]     |
[INFO] [stdout] 755 | /         return (0, 1) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 756 | |             &word1.dropped_last(),
[INFO] [stdout] 757 | |             &word2.dropped_last(),
[INFO] [stdout] 758 | |         )
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 755 ~         (0, 1) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 756 ~             &word1.dropped_last(),
[INFO] [stdout] 757 ~             &word2.dropped_last(),
[INFO] [stdout] 758 ~         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let_chains,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:761:3
[INFO] [stdout]     |
[INFO] [stdout] 761 |         return (0, 0).into()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 761 -         return (0, 0).into()
[INFO] [stdout] 761 +         (0, 0).into()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: feature `coroutine_trait` is declared but not used
[INFO] [stdout]   --> src/main.rs:16:22
[INFO] [stdout]    |
[INFO] [stdout] 16 |     feature(coroutines, coroutine_trait, iter_from_coroutine),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `random_action_index` is never read
[INFO] [stdout]    --> src/main.rs:720:4
[INFO] [stdout]     |
[INFO] [stdout] 720 | /             #[allow(unused_assignments)]
[INFO] [stdout] 721 | |             random_action_index -= 1;
[INFO] [stdout]     | |____________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.into_iter()` call is equivalent to `.iter()` and will not consume the `slice`
[INFO] [stdout]    --> src/main.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |         assert!(chars.into_iter().all(|&c| alphabet.contains(c)));
[INFO] [stdout]     |                       ^^^^^^^^^ help: call directly: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stdout]     = note: `#[warn(clippy::into_iter_on_ref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: implementation of inherent method `to_string(&self) -> String` for type `Word<A>`
[INFO] [stdout]    --> src/main.rs:448:2
[INFO] [stdout]     |
[INFO] [stdout] 448 | /     fn to_string(&self) -> String {
[INFO] [stdout] 449 | |         self.chars.iter().collect()
[INFO] [stdout] 450 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: implement trait `Display` for type `Word<A>` instead
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string
[INFO] [stdout]     = note: `#[warn(clippy::inherent_to_string)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:487:8
[INFO] [stdout]     |
[INFO] [stdout] 487 |                 if !(index_start <= index_end) { return false }
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(index_start > index_end)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:493:8
[INFO] [stdout]     |
[INFO] [stdout] 493 |                 if !(index_start <= index_end) { return false }
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(index_start > index_end)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:500:8
[INFO] [stdout]     |
[INFO] [stdout] 500 |                 if !(index_start + 1 < index_end) { return false }
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(index_start + 1 >= index_end)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `map(..).flatten()` on `Iterator`
[INFO] [stdout]    --> src/main.rs:539:7
[INFO] [stdout]     |
[INFO] [stdout] 539 |                       .map(|p| p.iter().map(|&c| c))
[INFO] [stdout]     |  ______________________^
[INFO] [stdout] 540 | |                     .flatten()
[INFO] [stdout]     | |______________________________^ help: try replacing `map` with `flat_map` and remove the `.flatten()`: `flat_map(|p| p.iter().map(|&c| c))`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_flatten
[INFO] [stdout]     = note: `#[warn(clippy::map_flatten)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for copying elements
[INFO] [stdout]    --> src/main.rs:539:15
[INFO] [stdout]     |
[INFO] [stdout] 539 |                     .map(|p| p.iter().map(|&c| c))
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `p.iter().copied()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout]     = note: `#[warn(clippy::map_clone)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:747:44
[INFO] [stdout]     |
[INFO] [stdout] 747 |     if word1.len() == 0 || word2.len() == 0 { return (0, 0).into() }
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 747 -     if word1.len() == 0 || word2.len() == 0 { return (0, 0).into() }
[INFO] [stdout] 747 +     if word1.len() == 0 || word2.len() == 0 { (0, 0).into() }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:749:3
[INFO] [stdout]     |
[INFO] [stdout] 749 | /         return (1, 0) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 750 | |             &word1.dropped_first(),
[INFO] [stdout] 751 | |             &word2.dropped_first(),
[INFO] [stdout] 752 | |         )
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 749 ~         (1, 0) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 750 ~             &word1.dropped_first(),
[INFO] [stdout] 751 ~             &word2.dropped_first(),
[INFO] [stdout] 752 ~         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:755:3
[INFO] [stdout]     |
[INFO] [stdout] 755 | /         return (0, 1) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 756 | |             &word1.dropped_last(),
[INFO] [stdout] 757 | |             &word2.dropped_last(),
[INFO] [stdout] 758 | |         )
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 755 ~         (0, 1) + calc_common_prefix_and_suffix_len(
[INFO] [stdout] 756 ~             &word1.dropped_last(),
[INFO] [stdout] 757 ~             &word2.dropped_last(),
[INFO] [stdout] 758 ~         )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:761:3
[INFO] [stdout]     |
[INFO] [stdout] 761 |         return (0, 0).into()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 761 -         return (0, 0).into()
[INFO] [stdout] 761 +         (0, 0).into()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: feature `coroutine_trait` is declared but not used
[INFO] [stdout]   --> src/main.rs:16:22
[INFO] [stdout]    |
[INFO] [stdout] 16 |     feature(coroutines, coroutine_trait, iter_from_coroutine),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.29s
[INFO] running `Command { std: "docker" "inspect" "f58ed73032257454321ca6e3e0a4831cf1a2ff70a1cdf5b2e8ac4e8d953c67a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f58ed73032257454321ca6e3e0a4831cf1a2ff70a1cdf5b2e8ac4e8d953c67a8", kill_on_drop: false }`
[INFO] [stdout] f58ed73032257454321ca6e3e0a4831cf1a2ff70a1cdf5b2e8ac4e8d953c67a8