[INFO] updating cached repository nafarlee/thoughtfuck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nafarlee/thoughtfuck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nafarlee/thoughtfuck" "work/ex/clippy-test-run/sources/stable/gh/nafarlee/thoughtfuck"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/nafarlee/thoughtfuck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nafarlee/thoughtfuck" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/nafarlee/thoughtfuck"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/nafarlee/thoughtfuck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a920bd0da6459e8a0c4f68f6296ab498bbb48b9
[INFO] sha for GitHub repo nafarlee/thoughtfuck: 1a920bd0da6459e8a0c4f68f6296ab498bbb48b9
[INFO] validating manifest of nafarlee/thoughtfuck 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 nafarlee/thoughtfuck 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 nafarlee/thoughtfuck
[INFO] finished frobbing nafarlee/thoughtfuck
[INFO] frobbed toml for nafarlee/thoughtfuck written to work/ex/clippy-test-run/sources/stable/gh/nafarlee/thoughtfuck/Cargo.toml
[INFO] started frobbing nafarlee/thoughtfuck
[INFO] finished frobbing nafarlee/thoughtfuck
[INFO] frobbed toml for nafarlee/thoughtfuck written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/nafarlee/thoughtfuck/Cargo.toml
[INFO] crate nafarlee/thoughtfuck 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 nafarlee/thoughtfuck 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/gh/nafarlee/thoughtfuck:/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] ffdb97dfaa2da51845f9ed7b32d8176c48d2a46b5ca5c2902f5df1f7abdece76
[INFO] running `"docker" "start" "-a" "ffdb97dfaa2da51845f9ed7b32d8176c48d2a46b5ca5c2902f5df1f7abdece76"`
[INFO] [stderr]     Checking thoughtfuck v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/vm.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         println!("");
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/vm.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         println!("");
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/program.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     return None;
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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: unneeded return statement
[INFO] [stderr]    --> src/program.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |         return self;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `self`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/program.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 | /         return match index {
[INFO] [stderr] 182 | |             Some(index) => ProgramPatch {
[INFO] [stderr] 183 | |                 instruction_pointer: index + 1,
[INFO] [stderr] 184 | |                 status: ProgramStatus::Normal,
[INFO] [stderr] ...   |
[INFO] [stderr] 192 | |             },
[INFO] [stderr] 193 | |         };
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 181 |         match index {
[INFO] [stderr] 182 |             Some(index) => ProgramPatch {
[INFO] [stderr] 183 |                 instruction_pointer: index + 1,
[INFO] [stderr] 184 |                 status: ProgramStatus::Normal,
[INFO] [stderr] 185 |                 current_depth,
[INFO] [stderr] 186 |             },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/program.rs:178:13
[INFO] [stderr]     |
[INFO] [stderr] 178 |             return current_depth == goal_depth;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `current_depth == goal_depth`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/parse.rs:32:30
[INFO] [stderr]    |
[INFO] [stderr] 32 |         const COMMAND_TOUR: &'static str = ".,><+-[]9";
[INFO] [stderr]    |                             -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/program.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     return None;
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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: unneeded return statement
[INFO] [stderr]    --> src/program.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |         return self;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `self`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/program.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 | /         return match index {
[INFO] [stderr] 182 | |             Some(index) => ProgramPatch {
[INFO] [stderr] 183 | |                 instruction_pointer: index + 1,
[INFO] [stderr] 184 | |                 status: ProgramStatus::Normal,
[INFO] [stderr] ...   |
[INFO] [stderr] 192 | |             },
[INFO] [stderr] 193 | |         };
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 181 |         match index {
[INFO] [stderr] 182 |             Some(index) => ProgramPatch {
[INFO] [stderr] 183 |                 instruction_pointer: index + 1,
[INFO] [stderr] 184 |                 status: ProgramStatus::Normal,
[INFO] [stderr] 185 |                 current_depth,
[INFO] [stderr] 186 |             },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/program.rs:178:13
[INFO] [stderr]     |
[INFO] [stderr] 178 |             return current_depth == goal_depth;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `current_depth == goal_depth`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/vm.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         match io::stdin().bytes().next() {
[INFO] [stderr] 34 | |             Some(res) => {
[INFO] [stderr] 35 | |                 match res {
[INFO] [stderr] 36 | |                     Ok(value) => self.cells[self.data_pointer] = value,
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |             None => {}
[INFO] [stderr] 41 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 33 |         if let Some(res) = io::stdin().bytes().next() {
[INFO] [stderr] 34 |     match res {
[INFO] [stderr] 35 |         Ok(value) => self.cells[self.data_pointer] = value,
[INFO] [stderr] 36 |         Err(error) => panic!(error),
[INFO] [stderr] 37 |     }
[INFO] [stderr] 38 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/parse.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 | /         match command {
[INFO] [stderr] 19 | |             Some(com) => vec.push(com),
[INFO] [stderr] 20 | |             None => {}
[INFO] [stderr] 21 | |         }
[INFO] [stderr]    | |_________^ help: try this: `if let Some(com) = command { vec.push(com) }`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `program::Program`
[INFO] [stderr]   --> src/program.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 | /     pub fn new() -> Program {
[INFO] [stderr] 46 | |         Program {
[INFO] [stderr] 47 | |             instructions: Vec::new(),
[INFO] [stderr] 48 | |             instruction_pointer: None,
[INFO] [stderr] ...  |
[INFO] [stderr] 51 | |         }
[INFO] [stderr] 52 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl Default for program::Program {
[INFO] [stderr] 45 |     fn default() -> Self {
[INFO] [stderr] 46 |         Self::new()
[INFO] [stderr] 47 |     }
[INFO] [stderr] 48 | }
[INFO] [stderr]    |
[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/program.rs:145:32
[INFO] [stderr]     |
[INFO] [stderr] 145 |     fn backward_jump(commands: &Vec<Command>, start: usize, depth: u64) -> ProgramPatch {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^ help: change this to: `&[Command]`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/program.rs:167:19
[INFO] [stderr]     |
[INFO] [stderr] 167 |         commands: &Vec<Command>,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^ help: change this to: `&[Command]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/program.rs:173:13
[INFO] [stderr]     |
[INFO] [stderr] 173 | /             match command {
[INFO] [stderr] 174 | |                 &Command::JumpBackward => current_depth -= 1,
[INFO] [stderr] 175 | |                 &Command::JumpForward => current_depth += 1,
[INFO] [stderr] 176 | |                 _ => {}
[INFO] [stderr] 177 | |             };
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 173 |             match *command {
[INFO] [stderr] 174 |                 Command::JumpBackward => current_depth -= 1,
[INFO] [stderr] 175 |                 Command::JumpForward => current_depth += 1,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/vm.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 | /         match io::stdin().bytes().next() {
[INFO] [stderr] 34 | |             Some(res) => {
[INFO] [stderr] 35 | |                 match res {
[INFO] [stderr] 36 | |                     Ok(value) => self.cells[self.data_pointer] = value,
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |             None => {}
[INFO] [stderr] 41 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 33 |         if let Some(res) = io::stdin().bytes().next() {
[INFO] [stderr] 34 |     match res {
[INFO] [stderr] 35 |         Ok(value) => self.cells[self.data_pointer] = value,
[INFO] [stderr] 36 |         Err(error) => panic!(error),
[INFO] [stderr] 37 |     }
[INFO] [stderr] 38 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/parse.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 | /         match command {
[INFO] [stderr] 19 | |             Some(com) => vec.push(com),
[INFO] [stderr] 20 | |             None => {}
[INFO] [stderr] 21 | |         }
[INFO] [stderr]    | |_________^ help: try this: `if let Some(com) = command { vec.push(com) }`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `program::Program`
[INFO] [stderr]   --> src/program.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 | /     pub fn new() -> Program {
[INFO] [stderr] 46 | |         Program {
[INFO] [stderr] 47 | |             instructions: Vec::new(),
[INFO] [stderr] 48 | |             instruction_pointer: None,
[INFO] [stderr] ...  |
[INFO] [stderr] 51 | |         }
[INFO] [stderr] 52 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl Default for program::Program {
[INFO] [stderr] 45 |     fn default() -> Self {
[INFO] [stderr] 46 |         Self::new()
[INFO] [stderr] 47 |     }
[INFO] [stderr] 48 | }
[INFO] [stderr]    |
[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/program.rs:145:32
[INFO] [stderr]     |
[INFO] [stderr] 145 |     fn backward_jump(commands: &Vec<Command>, start: usize, depth: u64) -> ProgramPatch {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^ help: change this to: `&[Command]`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/program.rs:167:19
[INFO] [stderr]     |
[INFO] [stderr] 167 |         commands: &Vec<Command>,
[INFO] [stderr]     |                   ^^^^^^^^^^^^^ help: change this to: `&[Command]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/program.rs:173:13
[INFO] [stderr]     |
[INFO] [stderr] 173 | /             match command {
[INFO] [stderr] 174 | |                 &Command::JumpBackward => current_depth -= 1,
[INFO] [stderr] 175 | |                 &Command::JumpForward => current_depth += 1,
[INFO] [stderr] 176 | |                 _ => {}
[INFO] [stderr] 177 | |             };
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 173 |             match *command {
[INFO] [stderr] 174 |                 Command::JumpBackward => current_depth -= 1,
[INFO] [stderr] 175 |                 Command::JumpForward => current_depth += 1,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:27:43
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn repl(mut vm: VM, mut program: Program) -> () {
[INFO] [stderr]    |                                           ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:48:63
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn interpreter(arg: String, mut vm: VM, mut program: Program) -> () {
[INFO] [stderr]    |                                                               ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> tests/common/faux_stdout.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |                 return Ok(s.len());
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(s.len())`
[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: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:27:43
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn repl(mut vm: VM, mut program: Program) -> () {
[INFO] [stderr]    |                                           ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:48:63
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn interpreter(arg: String, mut vm: VM, mut program: Program) -> () {
[INFO] [stderr]    |                                                               ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `"docker" "inspect" "ffdb97dfaa2da51845f9ed7b32d8176c48d2a46b5ca5c2902f5df1f7abdece76"`
[INFO] running `"docker" "rm" "-f" "ffdb97dfaa2da51845f9ed7b32d8176c48d2a46b5ca5c2902f5df1f7abdece76"`
[INFO] [stdout] ffdb97dfaa2da51845f9ed7b32d8176c48d2a46b5ca5c2902f5df1f7abdece76