[INFO] updating cached repository radekcieciwa/SwiftToPlantUMLConverter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/radekcieciwa/SwiftToPlantUMLConverter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/radekcieciwa/SwiftToPlantUMLConverter" "work/ex/clippy-test-run/sources/stable/gh/radekcieciwa/SwiftToPlantUMLConverter"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/radekcieciwa/SwiftToPlantUMLConverter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/radekcieciwa/SwiftToPlantUMLConverter" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/radekcieciwa/SwiftToPlantUMLConverter"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/radekcieciwa/SwiftToPlantUMLConverter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cc3d2e821ee446a0736f6ac6afac0f677f5e4add
[INFO] sha for GitHub repo radekcieciwa/SwiftToPlantUMLConverter: cc3d2e821ee446a0736f6ac6afac0f677f5e4add
[INFO] validating manifest of radekcieciwa/SwiftToPlantUMLConverter 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 radekcieciwa/SwiftToPlantUMLConverter 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 radekcieciwa/SwiftToPlantUMLConverter
[INFO] finished frobbing radekcieciwa/SwiftToPlantUMLConverter
[INFO] frobbed toml for radekcieciwa/SwiftToPlantUMLConverter written to work/ex/clippy-test-run/sources/stable/gh/radekcieciwa/SwiftToPlantUMLConverter/Cargo.toml
[INFO] started frobbing radekcieciwa/SwiftToPlantUMLConverter
[INFO] finished frobbing radekcieciwa/SwiftToPlantUMLConverter
[INFO] frobbed toml for radekcieciwa/SwiftToPlantUMLConverter written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/radekcieciwa/SwiftToPlantUMLConverter/Cargo.toml
[INFO] crate radekcieciwa/SwiftToPlantUMLConverter 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 radekcieciwa/SwiftToPlantUMLConverter against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/radekcieciwa/SwiftToPlantUMLConverter:/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] 5e42abaeb86c209bc0ccea4f03e448b8f5e77202cf06448334711eb60df3e529
[INFO] running `"docker" "start" "-a" "5e42abaeb86c209bc0ccea4f03e448b8f5e77202cf06448334711eb60df3e529"`
[INFO] [stderr]     Checking swift_to_plant_uml_converter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]    --> main.rs:146:21
[INFO] [stderr]     |
[INFO] [stderr] 146 |                     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]    --> main.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     println!("");
[INFO] [stderr]     |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]     |
[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]    --> main.rs:203:5
[INFO] [stderr]     |
[INFO] [stderr] 203 |     println!("");
[INFO] [stderr]     |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]     |
[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]    --> main.rs:146:21
[INFO] [stderr]     |
[INFO] [stderr] 146 |                     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]    --> main.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     println!("");
[INFO] [stderr]     |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]     |
[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]    --> main.rs:203:5
[INFO] [stderr]     |
[INFO] [stderr] 203 |     println!("");
[INFO] [stderr]     |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]     |
[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]    --> main.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |         return String::from_utf8(output.stdout).unwrap();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from_utf8(output.stdout).unwrap()`
[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]    --> main.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |         return String::from_utf8(output.stdout).unwrap();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from_utf8(output.stdout).unwrap()`
[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: length comparison to zero
[INFO] [stderr]   --> main.rs:61:12
[INFO] [stderr]    |
[INFO] [stderr] 61 |         if inherited_types_unwrapped.len() > 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!inherited_types_unwrapped.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> main.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 | /             match kind {
[INFO] [stderr] 75 | |                 &CLASS_KEY => Some(Token::Type(Kind::Class, name, inherited_items, Vec::new())),
[INFO] [stderr] 76 | |                 &PROTOCOL_KEY => Some(Token::Type(Kind::Protocol, name, inherited_items, Vec::new())),
[INFO] [stderr] 77 | |                 &VARIABLE_KEY => Some(Token::Object(Kind::Variable, name)),
[INFO] [stderr] 78 | |                 &FUNCTION_KEY => Some(Token::Object(Kind::Function, name)),
[INFO] [stderr] 79 | |                 _ => None,
[INFO] [stderr] 80 | |             }
[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] 74 |             match *kind {
[INFO] [stderr] 75 |                 CLASS_KEY => Some(Token::Type(Kind::Class, name, inherited_items, Vec::new())),
[INFO] [stderr] 76 |                 PROTOCOL_KEY => Some(Token::Type(Kind::Protocol, name, inherited_items, Vec::new())),
[INFO] [stderr] 77 |                 VARIABLE_KEY => Some(Token::Object(Kind::Variable, name)),
[INFO] [stderr] 78 |                 FUNCTION_KEY => Some(Token::Object(Kind::Function, name)),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> main.rs:93:12
[INFO] [stderr]    |
[INFO] [stderr] 93 |         if inner_json_array_unwrapped.len() > 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!inner_json_array_unwrapped.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> main.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 | /         match token {
[INFO] [stderr] 127 | |             Token::Type(kind, name, inherited_types, objects) => {
[INFO] [stderr] 128 | |                 match kind {
[INFO] [stderr] 129 | |                     Kind::Protocol => { print!("interface {}", name); },
[INFO] [stderr] ...   |
[INFO] [stderr] 156 | |             _ => { },
[INFO] [stderr] 157 | |         }
[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] 126 |         if let Token::Type(kind, name, inherited_types, objects) = token {
[INFO] [stderr] 127 |     match kind {
[INFO] [stderr] 128 |         Kind::Protocol => { print!("interface {}", name); },
[INFO] [stderr] 129 |         Kind::Class => { print!("class {}", name); },
[INFO] [stderr] 130 |         _ => {}
[INFO] [stderr] 131 |     }
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> main.rs:134:20
[INFO] [stderr]     |
[INFO] [stderr] 134 |                 if objects.len() > 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!objects.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> main.rs:175:57
[INFO] [stderr]     |
[INFO] [stderr] 175 |     let files_list: Vec<&str> = files_list_output.split("\n").collect();
[INFO] [stderr]     |                                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> main.rs:61:12
[INFO] [stderr]    |
[INFO] [stderr] 61 |         if inherited_types_unwrapped.len() > 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!inherited_types_unwrapped.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> main.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 | /             match kind {
[INFO] [stderr] 75 | |                 &CLASS_KEY => Some(Token::Type(Kind::Class, name, inherited_items, Vec::new())),
[INFO] [stderr] 76 | |                 &PROTOCOL_KEY => Some(Token::Type(Kind::Protocol, name, inherited_items, Vec::new())),
[INFO] [stderr] 77 | |                 &VARIABLE_KEY => Some(Token::Object(Kind::Variable, name)),
[INFO] [stderr] 78 | |                 &FUNCTION_KEY => Some(Token::Object(Kind::Function, name)),
[INFO] [stderr] 79 | |                 _ => None,
[INFO] [stderr] 80 | |             }
[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] 74 |             match *kind {
[INFO] [stderr] 75 |                 CLASS_KEY => Some(Token::Type(Kind::Class, name, inherited_items, Vec::new())),
[INFO] [stderr] 76 |                 PROTOCOL_KEY => Some(Token::Type(Kind::Protocol, name, inherited_items, Vec::new())),
[INFO] [stderr] 77 |                 VARIABLE_KEY => Some(Token::Object(Kind::Variable, name)),
[INFO] [stderr] 78 |                 FUNCTION_KEY => Some(Token::Object(Kind::Function, name)),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> main.rs:93:12
[INFO] [stderr]    |
[INFO] [stderr] 93 |         if inner_json_array_unwrapped.len() > 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!inner_json_array_unwrapped.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> main.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 | /         match token {
[INFO] [stderr] 127 | |             Token::Type(kind, name, inherited_types, objects) => {
[INFO] [stderr] 128 | |                 match kind {
[INFO] [stderr] 129 | |                     Kind::Protocol => { print!("interface {}", name); },
[INFO] [stderr] ...   |
[INFO] [stderr] 156 | |             _ => { },
[INFO] [stderr] 157 | |         }
[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] 126 |         if let Token::Type(kind, name, inherited_types, objects) = token {
[INFO] [stderr] 127 |     match kind {
[INFO] [stderr] 128 |         Kind::Protocol => { print!("interface {}", name); },
[INFO] [stderr] 129 |         Kind::Class => { print!("class {}", name); },
[INFO] [stderr] 130 |         _ => {}
[INFO] [stderr] 131 |     }
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> main.rs:134:20
[INFO] [stderr]     |
[INFO] [stderr] 134 |                 if objects.len() > 0 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!objects.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> main.rs:175:57
[INFO] [stderr]     |
[INFO] [stderr] 175 |     let files_list: Vec<&str> = files_list_output.split("\n").collect();
[INFO] [stderr]     |                                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `"docker" "inspect" "5e42abaeb86c209bc0ccea4f03e448b8f5e77202cf06448334711eb60df3e529"`
[INFO] running `"docker" "rm" "-f" "5e42abaeb86c209bc0ccea4f03e448b8f5e77202cf06448334711eb60df3e529"`
[INFO] [stdout] 5e42abaeb86c209bc0ccea4f03e448b8f5e77202cf06448334711eb60df3e529