[INFO] crate rustplotlib 0.0.4 is already in cache
[INFO] extracting crate rustplotlib 0.0.4 into work/ex/clippy-test-run/sources/stable/reg/rustplotlib/0.0.4
[INFO] extracting crate rustplotlib 0.0.4 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rustplotlib/0.0.4
[INFO] validating manifest of rustplotlib-0.0.4 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 rustplotlib-0.0.4 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 rustplotlib-0.0.4
[INFO] finished frobbing rustplotlib-0.0.4
[INFO] frobbed toml for rustplotlib-0.0.4 written to work/ex/clippy-test-run/sources/stable/reg/rustplotlib/0.0.4/Cargo.toml
[INFO] started frobbing rustplotlib-0.0.4
[INFO] finished frobbing rustplotlib-0.0.4
[INFO] frobbed toml for rustplotlib-0.0.4 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rustplotlib/0.0.4/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 rustplotlib-0.0.4 against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rustplotlib/0.0.4:/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 -Dclippy::into_iter_on_array" "-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] 3533b2a8f6d61b7df3c4eb52726a3bb91df56fffd15428b05b2ba9eeffa0230f
[INFO] running `"docker" "start" "-a" "3533b2a8f6d61b7df3c4eb52726a3bb91df56fffd15428b05b2ba9eeffa0230f"`
[INFO] [stderr]     Checking rustplotlib v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/backend/mpl.rs:19:32
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut mpl = Matplotlib { child: child };
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: replace it with: `child`
[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/backend/mpl.rs:19:32
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut mpl = Matplotlib { child: child };
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: replace it with: `child`
[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: defining a method called `add` on this type; consider implementing the `std::ops::Add` trait or choosing a less ambiguous name
[INFO] [stderr]   --> src/axes2d.rs:25:3
[INFO] [stderr]    |
[INFO] [stderr] 25 | /   pub fn add<P: Into<PlotData<'a>>>(mut self, p: P) -> Self {
[INFO] [stderr] 26 | |     self.plot_data.push(p.into());
[INFO] [stderr] 27 | |     self
[INFO] [stderr] 28 | |   }
[INFO] [stderr]    | |___^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::should_implement_trait)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/axes2d.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |     for ref plot in &self.plot_data {
[INFO] [stderr]    |         ^^^^^^^^    --------------- help: try: `let plot = &&self.plot_data;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/figure.rs:30:24
[INFO] [stderr]    |
[INFO] [stderr] 30 |       self.axes.extend((0..remains).into_iter().map(|_| None));
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..remains)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `add` on this type; consider implementing the `std::ops::Add` trait or choosing a less ambiguous name
[INFO] [stderr]   --> src/axes2d.rs:25:3
[INFO] [stderr]    |
[INFO] [stderr] 25 | /   pub fn add<P: Into<PlotData<'a>>>(mut self, p: P) -> Self {
[INFO] [stderr] 26 | |     self.plot_data.push(p.into());
[INFO] [stderr] 27 | |     self
[INFO] [stderr] 28 | |   }
[INFO] [stderr]    | |___^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::should_implement_trait)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/figure.rs:38:7
[INFO] [stderr]    |
[INFO] [stderr] 38 | /       if let &Some(ref axes) = axes {
[INFO] [stderr] 39 | |         mpl.subplot(self.rows, self.cols, (i + 1) as u32)?;
[INFO] [stderr] 40 | |         axes.apply(mpl)?;
[INFO] [stderr] 41 | |       }
[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] 38 |       if let Some(ref axes) = *axes {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/axes2d.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |     for ref plot in &self.plot_data {
[INFO] [stderr]    |         ^^^^^^^^    --------------- help: try: `let plot = &&self.plot_data;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/backend/mpl.rs:32:11
[INFO] [stderr]    |
[INFO] [stderr] 32 |       let ref mut stdin = self.child.stdin.as_mut().unwrap();
[INFO] [stderr]    |       ----^^^^^^^^^^^^^-------------------------------------- help: try: `let stdin = &mut self.child.stdin.as_mut().unwrap();`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/figure.rs:30:24
[INFO] [stderr]    |
[INFO] [stderr] 30 |       self.axes.extend((0..remains).into_iter().map(|_| None));
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..remains)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/figure.rs:38:7
[INFO] [stderr]    |
[INFO] [stderr] 38 | /       if let &Some(ref axes) = axes {
[INFO] [stderr] 39 | |         mpl.subplot(self.rows, self.cols, (i + 1) as u32)?;
[INFO] [stderr] 40 | |         axes.apply(mpl)?;
[INFO] [stderr] 41 | |       }
[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] 38 |       if let Some(ref axes) = *axes {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/backend/mpl.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 | /     if let &Some(ref label) = label {
[INFO] [stderr] 94 | |       code += &format!("label='{}', ", label);
[INFO] [stderr] 95 | |     }
[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] 93 |     if let Some(ref label) = *label {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/backend/mpl.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 | /     if let &Some(ref color) = color {
[INFO] [stderr] 97 | |       code += &format!("color='{}', ", color);
[INFO] [stderr] 98 | |     }
[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] 96 |     if let Some(ref color) = *color {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:99:5
[INFO] [stderr]     |
[INFO] [stderr] 99  | /     if let &Some(ref marker) = marker {
[INFO] [stderr] 100 | |       code += &format!("marker='{}', ", marker);
[INFO] [stderr] 101 | |     }
[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] 99  |     if let Some(ref marker) = *marker {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/backend/mpl.rs:32:11
[INFO] [stderr]    |
[INFO] [stderr] 32 |       let ref mut stdin = self.child.stdin.as_mut().unwrap();
[INFO] [stderr]    |       ----^^^^^^^^^^^^^-------------------------------------- help: try: `let stdin = &mut self.child.stdin.as_mut().unwrap();`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 | /     if let &Some(ref label) = label {
[INFO] [stderr] 117 | |       code += &format!("label='{}', ", label);
[INFO] [stderr] 118 | |     }
[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] 116 |     if let Some(ref label) = *label {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 | /     if let &Some(ref color) = color {
[INFO] [stderr] 120 | |       code += &format!("color='{}', ", color);
[INFO] [stderr] 121 | |     }
[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] 119 |     if let Some(ref color) = *color {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | /     if let &Some(ref marker) = marker {
[INFO] [stderr] 123 | |       code += &format!("marker='{}', ", marker);
[INFO] [stderr] 124 | |     }
[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] 122 |     if let Some(ref marker) = *marker {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 | /     if let &Some(ref ls) = linestyle {
[INFO] [stderr] 126 | |       code += &format!("linestyle='{}', ", ls);
[INFO] [stderr] 127 | |     }
[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] 125 |     if let Some(ref ls) = *linestyle {
[INFO] [stderr]     |            ^^^^^^^^^^^^   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 | /     if let &Some(ref lw) = linewidth {
[INFO] [stderr] 129 | |       code += &format!("linewidth='{}', ", lw);
[INFO] [stderr] 130 | |     }
[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] 128 |     if let Some(ref lw) = *linewidth {
[INFO] [stderr]     |            ^^^^^^^^^^^^   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:147:5
[INFO] [stderr]     |
[INFO] [stderr] 147 | /     if let &Some(ref where_) = where_ {
[INFO] [stderr] 148 | |       code += &format!("where='{}', ", to_pyvec(where_));
[INFO] [stderr] 149 | |     }
[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] 147 |     if let Some(ref where_) = *where_ {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 | /     if let &Some(ref step) = step {
[INFO] [stderr] 152 | |       code += &format!("step='{}', ", step);
[INFO] [stderr] 153 | |     }
[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] 151 |     if let Some(ref step) = *step {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (8/7)
[INFO] [stderr]   --> src/backend/mod.rs:22:3
[INFO] [stderr]    |
[INFO] [stderr] 22 | /   fn plot(&mut self,
[INFO] [stderr] 23 | |           xdata: &[f64],
[INFO] [stderr] 24 | |           ydata: &[f64],
[INFO] [stderr] 25 | |           label: &Option<String>,
[INFO] [stderr] ...  |
[INFO] [stderr] 29 | |           linewidth: &Option<f64>)
[INFO] [stderr] 30 | |           -> io::Result<&mut Self>;
[INFO] [stderr]    | |___________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/backend/mpl.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 | /     if let &Some(ref label) = label {
[INFO] [stderr] 94 | |       code += &format!("label='{}', ", label);
[INFO] [stderr] 95 | |     }
[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] 93 |     if let Some(ref label) = *label {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/backend/mpl.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 | /     if let &Some(ref color) = color {
[INFO] [stderr] 97 | |       code += &format!("color='{}', ", color);
[INFO] [stderr] 98 | |     }
[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] 96 |     if let Some(ref color) = *color {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:99:5
[INFO] [stderr]     |
[INFO] [stderr] 99  | /     if let &Some(ref marker) = marker {
[INFO] [stderr] 100 | |       code += &format!("marker='{}', ", marker);
[INFO] [stderr] 101 | |     }
[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] 99  |     if let Some(ref marker) = *marker {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 | /     if let &Some(ref label) = label {
[INFO] [stderr] 117 | |       code += &format!("label='{}', ", label);
[INFO] [stderr] 118 | |     }
[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] 116 |     if let Some(ref label) = *label {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 | /     if let &Some(ref color) = color {
[INFO] [stderr] 120 | |       code += &format!("color='{}', ", color);
[INFO] [stderr] 121 | |     }
[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] 119 |     if let Some(ref color) = *color {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | /     if let &Some(ref marker) = marker {
[INFO] [stderr] 123 | |       code += &format!("marker='{}', ", marker);
[INFO] [stderr] 124 | |     }
[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] 122 |     if let Some(ref marker) = *marker {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 | /     if let &Some(ref ls) = linestyle {
[INFO] [stderr] 126 | |       code += &format!("linestyle='{}', ", ls);
[INFO] [stderr] 127 | |     }
[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] 125 |     if let Some(ref ls) = *linestyle {
[INFO] [stderr]     |            ^^^^^^^^^^^^   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 | /     if let &Some(ref lw) = linewidth {
[INFO] [stderr] 129 | |       code += &format!("linewidth='{}', ", lw);
[INFO] [stderr] 130 | |     }
[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] 128 |     if let Some(ref lw) = *linewidth {
[INFO] [stderr]     |            ^^^^^^^^^^^^   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:147:5
[INFO] [stderr]     |
[INFO] [stderr] 147 | /     if let &Some(ref where_) = where_ {
[INFO] [stderr] 148 | |       code += &format!("where='{}', ", to_pyvec(where_));
[INFO] [stderr] 149 | |     }
[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] 147 |     if let Some(ref where_) = *where_ {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/backend/mpl.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 | /     if let &Some(ref step) = step {
[INFO] [stderr] 152 | |       code += &format!("step='{}', ", step);
[INFO] [stderr] 153 | |     }
[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] 151 |     if let Some(ref step) = *step {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (8/7)
[INFO] [stderr]   --> src/backend/mod.rs:22:3
[INFO] [stderr]    |
[INFO] [stderr] 22 | /   fn plot(&mut self,
[INFO] [stderr] 23 | |           xdata: &[f64],
[INFO] [stderr] 24 | |           ydata: &[f64],
[INFO] [stderr] 25 | |           label: &Option<String>,
[INFO] [stderr] ...  |
[INFO] [stderr] 29 | |           linewidth: &Option<f64>)
[INFO] [stderr] 30 | |           -> io::Result<&mut Self>;
[INFO] [stderr]    | |___________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> examples/simple.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |   let x: Vec<f64> = (0..40).into_iter().map(|i| (i as f64) * 0.08 * PI).collect();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `(0..40)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> examples/simple.rs:56:49
[INFO] [stderr]    |
[INFO] [stderr] 56 |   let x: Vec<f64> = (0..40).into_iter().map(|i| (i as f64) * 0.08 * PI).collect();
[INFO] [stderr]    |                                                 ^^^^^^^^^^ help: try: `f64::from(i)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `"docker" "inspect" "3533b2a8f6d61b7df3c4eb52726a3bb91df56fffd15428b05b2ba9eeffa0230f"`
[INFO] running `"docker" "rm" "-f" "3533b2a8f6d61b7df3c4eb52726a3bb91df56fffd15428b05b2ba9eeffa0230f"`
[INFO] [stdout] 3533b2a8f6d61b7df3c4eb52726a3bb91df56fffd15428b05b2ba9eeffa0230f