[INFO] crate rusty-data 0.0.3 is already in cache
[INFO] extracting crate rusty-data 0.0.3 into work/ex/clippy-test-run/sources/stable/reg/rusty-data/0.0.3
[INFO] extracting crate rusty-data 0.0.3 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rusty-data/0.0.3
[INFO] validating manifest of rusty-data-0.0.3 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 rusty-data-0.0.3 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 rusty-data-0.0.3
[INFO] finished frobbing rusty-data-0.0.3
[INFO] frobbed toml for rusty-data-0.0.3 written to work/ex/clippy-test-run/sources/stable/reg/rusty-data/0.0.3/Cargo.toml
[INFO] started frobbing rusty-data-0.0.3
[INFO] finished frobbing rusty-data-0.0.3
[INFO] frobbed toml for rusty-data-0.0.3 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rusty-data/0.0.3/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 rusty-data-0.0.3 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/rusty-data/0.0.3:/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] 55c10946d5f05617398cdc249e769f3758bfd0875ca1234fc9f4b3ccac21c131
[INFO] running `"docker" "start" "-a" "55c10946d5f05617398cdc249e769f3758bfd0875ca1234fc9f4b3ccac21c131"`
[INFO] [stderr]     Checking rusty-data v0.0.3 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/loader.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             has_header: has_header,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `has_header`
[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/loader.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |             delimiter: delimiter,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `delimiter`
[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/loader.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             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/loader.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             options: options,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: replace it with: `options`
[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/loader.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |             line: line,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `line`
[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/loader.rs:157:13
[INFO] [stderr]     |
[INFO] [stderr] 157 |             quote_char: quote_char,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `quote_char`
[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/loader.rs:158:13
[INFO] [stderr]     |
[INFO] [stderr] 158 |             delimiter: delimiter,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `delimiter`
[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/loader.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             has_header: has_header,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `has_header`
[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/loader.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |             delimiter: delimiter,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `delimiter`
[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/loader.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             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/loader.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             options: options,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: replace it with: `options`
[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/loader.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |             line: line,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `line`
[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/loader.rs:157:13
[INFO] [stderr]     |
[INFO] [stderr] 157 |             quote_char: quote_char,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `quote_char`
[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/loader.rs:158:13
[INFO] [stderr]     |
[INFO] [stderr] 158 |             delimiter: delimiter,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `delimiter`
[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: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/loader.rs:100:16
[INFO] [stderr]     |
[INFO] [stderr] 100 |           } else {
[INFO] [stderr]     |  ________________^
[INFO] [stderr] 101 | |             if let Some(line) = lines.next() {
[INFO] [stderr] 102 | |                 let line = try!(line);
[INFO] [stderr] 103 | |                 let values = LineSplitIter::new(line.to_string(),
[INFO] [stderr] ...   |
[INFO] [stderr] 113 | |             }
[INFO] [stderr] 114 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 100 |         } else if let Some(line) = lines.next() {
[INFO] [stderr] 101 |     let line = try!(line);
[INFO] [stderr] 102 |     let values = LineSplitIter::new(line.to_string(),
[INFO] [stderr] 103 |                                     self.options.quote_marker,
[INFO] [stderr] 104 |                                     self.options.delimiter);
[INFO] [stderr] 105 | 
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/loader.rs:100:16
[INFO] [stderr]     |
[INFO] [stderr] 100 |           } else {
[INFO] [stderr]     |  ________________^
[INFO] [stderr] 101 | |             if let Some(line) = lines.next() {
[INFO] [stderr] 102 | |                 let line = try!(line);
[INFO] [stderr] 103 | |                 let values = LineSplitIter::new(line.to_string(),
[INFO] [stderr] ...   |
[INFO] [stderr] 113 | |             }
[INFO] [stderr] 114 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 100 |         } else if let Some(line) = lines.next() {
[INFO] [stderr] 101 |     let line = try!(line);
[INFO] [stderr] 102 |     let values = LineSplitIter::new(line.to_string(),
[INFO] [stderr] 103 |                                     self.options.quote_marker,
[INFO] [stderr] 104 |                                     self.options.delimiter);
[INFO] [stderr] 105 | 
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/loader.rs:167:12
[INFO] [stderr]     |
[INFO] [stderr] 167 |         if self.line.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.line.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: this if-then-else expression returns a bool literal
[INFO] [stderr]    --> src/loader.rs:180:43
[INFO] [stderr]     |
[INFO] [stderr] 180 |                                      } else if c == self.delimiter && !in_quotes {
[INFO] [stderr]     |  ___________________________________________^
[INFO] [stderr] 181 | |                                        true
[INFO] [stderr] 182 | |                                    } else {
[INFO] [stderr] 183 | |                                        false
[INFO] [stderr] 184 | |                                    }
[INFO] [stderr]     | |____________________________________^ help: you can reduce it to: `c == self.delimiter && !in_quotes`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/datatable.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 |         if self.data_cols.len() > 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!self.data_cols.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: the loop variable `i` is only used to index `column_iters`.
[INFO] [stderr]   --> src/datatable.rs:71:26
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 for i in 0..cols {
[INFO] [stderr]    |                          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 for <item> in column_iters.iter_mut().take(cols) {
[INFO] [stderr]    |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: item `datatable::DataColumn` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/datatable.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | / impl DataColumn {
[INFO] [stderr] 115 | |     /// Constructs an empty data column.
[INFO] [stderr] 116 | |     pub fn empty() -> DataColumn {
[INFO] [stderr] 117 | |         DataColumn {
[INFO] [stderr] ...   |
[INFO] [stderr] 293 | |     }
[INFO] [stderr] 294 | | }
[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: the loop variable `i` is used to index `outer_vec`
[INFO] [stderr]    --> src/datatable.rs:207:34
[INFO] [stderr]     |
[INFO] [stderr] 207 |                         for i in 0..categories.len() {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 207 |                         for (i, <item>) in outer_vec.iter_mut().enumerate().take(categories.len()) {
[INFO] [stderr]     |                             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/datatable.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |          -> std::iter::Map<IntoIter<String>, fn(String) -> Result<U, <U as FromStr>::Err>>
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/datatable.rs:299:9
[INFO] [stderr]     |
[INFO] [stderr] 299 |      -> std::iter::Map<I, fn(<I as Iterator>::Item) -> Result<U, <U as FromStr>::Err>>
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/error.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /         match self {
[INFO] [stderr] 18 | |             &DataError::DataCastError => write!(f, "DataCastError"),
[INFO] [stderr] 19 | |             &DataError::InvalidStateError => write!(f, "InvalidStateError"),
[INFO] [stderr] 20 | |         }
[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] 17 |         match *self {
[INFO] [stderr] 18 |             DataError::DataCastError => write!(f, "DataCastError"),
[INFO] [stderr] 19 |             DataError::InvalidStateError => write!(f, "InvalidStateError"),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/error.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 | /         match self {
[INFO] [stderr] 27 | |             &DataError::DataCastError => "Failed to cast data.",
[INFO] [stderr] 28 | |             &DataError::InvalidStateError => "Operation was not valid for state of object.",
[INFO] [stderr] 29 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[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] 26 |         match *self {
[INFO] [stderr] 27 |             DataError::DataCastError => "Failed to cast data.",
[INFO] [stderr] 28 |             DataError::InvalidStateError => "Operation was not valid for state of object.",
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/loader.rs:167:12
[INFO] [stderr]     |
[INFO] [stderr] 167 |         if self.line.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.line.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: this if-then-else expression returns a bool literal
[INFO] [stderr]    --> src/loader.rs:180:43
[INFO] [stderr]     |
[INFO] [stderr] 180 |                                      } else if c == self.delimiter && !in_quotes {
[INFO] [stderr]     |  ___________________________________________^
[INFO] [stderr] 181 | |                                        true
[INFO] [stderr] 182 | |                                    } else {
[INFO] [stderr] 183 | |                                        false
[INFO] [stderr] 184 | |                                    }
[INFO] [stderr]     | |____________________________________^ help: you can reduce it to: `c == self.delimiter && !in_quotes`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_bool)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/datatable.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 |         if self.data_cols.len() > 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!self.data_cols.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: the loop variable `i` is only used to index `column_iters`.
[INFO] [stderr]   --> src/datatable.rs:71:26
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 for i in 0..cols {
[INFO] [stderr]    |                          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 for <item> in column_iters.iter_mut().take(cols) {
[INFO] [stderr]    |                     ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: item `datatable::DataColumn` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/datatable.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | / impl DataColumn {
[INFO] [stderr] 115 | |     /// Constructs an empty data column.
[INFO] [stderr] 116 | |     pub fn empty() -> DataColumn {
[INFO] [stderr] 117 | |         DataColumn {
[INFO] [stderr] ...   |
[INFO] [stderr] 293 | |     }
[INFO] [stderr] 294 | | }
[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: the loop variable `i` is used to index `outer_vec`
[INFO] [stderr]    --> src/datatable.rs:207:34
[INFO] [stderr]     |
[INFO] [stderr] 207 |                         for i in 0..categories.len() {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 207 |                         for (i, <item>) in outer_vec.iter_mut().enumerate().take(categories.len()) {
[INFO] [stderr]     |                             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/datatable.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |          -> std::iter::Map<IntoIter<String>, fn(String) -> Result<U, <U as FromStr>::Err>>
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/datatable.rs:299:9
[INFO] [stderr]     |
[INFO] [stderr] 299 |      -> std::iter::Map<I, fn(<I as Iterator>::Item) -> Result<U, <U as FromStr>::Err>>
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/error.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /         match self {
[INFO] [stderr] 18 | |             &DataError::DataCastError => write!(f, "DataCastError"),
[INFO] [stderr] 19 | |             &DataError::InvalidStateError => write!(f, "InvalidStateError"),
[INFO] [stderr] 20 | |         }
[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] 17 |         match *self {
[INFO] [stderr] 18 |             DataError::DataCastError => write!(f, "DataCastError"),
[INFO] [stderr] 19 |             DataError::InvalidStateError => write!(f, "InvalidStateError"),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/error.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 | /         match self {
[INFO] [stderr] 27 | |             &DataError::DataCastError => "Failed to cast data.",
[INFO] [stderr] 28 | |             &DataError::InvalidStateError => "Operation was not valid for state of object.",
[INFO] [stderr] 29 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[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] 26 |         match *self {
[INFO] [stderr] 27 |             DataError::DataCastError => "Failed to cast data.",
[INFO] [stderr] 28 |             DataError::InvalidStateError => "Operation was not valid for state of object.",
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "55c10946d5f05617398cdc249e769f3758bfd0875ca1234fc9f4b3ccac21c131"`
[INFO] running `"docker" "rm" "-f" "55c10946d5f05617398cdc249e769f3758bfd0875ca1234fc9f4b3ccac21c131"`
[INFO] [stdout] 55c10946d5f05617398cdc249e769f3758bfd0875ca1234fc9f4b3ccac21c131