[INFO] updating cached repository planet0104/rust-stroke-editor
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/planet0104/rust-stroke-editor
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/planet0104/rust-stroke-editor" "work/ex/clippy-test-run/sources/stable/gh/planet0104/rust-stroke-editor"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/planet0104/rust-stroke-editor'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/planet0104/rust-stroke-editor" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/rust-stroke-editor"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/rust-stroke-editor'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a2ddb943e7d779caba75e6e3a491e2d77265e7eb
[INFO] sha for GitHub repo planet0104/rust-stroke-editor: a2ddb943e7d779caba75e6e3a491e2d77265e7eb
[INFO] validating manifest of planet0104/rust-stroke-editor 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 planet0104/rust-stroke-editor 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 planet0104/rust-stroke-editor
[INFO] finished frobbing planet0104/rust-stroke-editor
[INFO] frobbed toml for planet0104/rust-stroke-editor written to work/ex/clippy-test-run/sources/stable/gh/planet0104/rust-stroke-editor/Cargo.toml
[INFO] started frobbing planet0104/rust-stroke-editor
[INFO] finished frobbing planet0104/rust-stroke-editor
[INFO] frobbed toml for planet0104/rust-stroke-editor written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/rust-stroke-editor/Cargo.toml
[INFO] crate planet0104/rust-stroke-editor has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting planet0104/rust-stroke-editor against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/planet0104/rust-stroke-editor:/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] becdc08aeaaa3a0c231f2c29d16e2af2d233d0823f9583182ebbcb434b3fe013
[INFO] running `"docker" "start" "-a" "becdc08aeaaa3a0c231f2c29d16e2af2d233d0823f9583182ebbcb434b3fe013"`
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.2
[INFO] [stderr]    Compiling base-x v0.2.3
[INFO] [stderr]     Checking discard v1.0.4
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.2
[INFO] [stderr]    Compiling stdweb v0.4.10
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling stdweb-derive v0.5.1
[INFO] [stderr]     Checking rust-stroke-editor v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/main.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |     static ref STROKES: Mutex<HashMap<char, Vec<Vec<(u16, u16)>>>> = Mutex::new(HashMap::new());
[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/main.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |     static ref STROKES: Mutex<HashMap<char, Vec<Vec<(u16, u16)>>>> = Mutex::new(HashMap::new());
[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: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:74:28
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let (width, height) = (CANVAS.width() as f64, CANVAS.height() as f64);
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(CANVAS.width())`
[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] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:74:51
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let (width, height) = (CANVAS.width() as f64, CANVAS.height() as f64);
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(CANVAS.height())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:113:17
[INFO] [stderr]     |
[INFO] [stderr] 113 |     CONTEXT.arc(pt.0 as f64, pt.1 as f64, 20.0, 0.0, 360.0, false);
[INFO] [stderr]     |                 ^^^^^^^^^^^ help: try: `f64::from(pt.0)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:113:30
[INFO] [stderr]     |
[INFO] [stderr] 113 |     CONTEXT.arc(pt.0 as f64, pt.1 as f64, 20.0, 0.0, 360.0, false);
[INFO] [stderr]     |                              ^^^^^^^^^^^ help: try: `f64::from(pt.1)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:142:25
[INFO] [stderr]     |
[INFO] [stderr] 142 |         CONTEXT.move_to(stroke[0].0 as f64, stroke[0].1 as f64);
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[0].0)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:142:45
[INFO] [stderr]     |
[INFO] [stderr] 142 |         CONTEXT.move_to(stroke[0].0 as f64, stroke[0].1 as f64);
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[0].1)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `stroke`.
[INFO] [stderr]    --> src/main.rs:143:18
[INFO] [stderr]     |
[INFO] [stderr] 143 |         for i in 1..stroke.len() {
[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] 143 |         for <item> in stroke.iter().skip(1) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:144:29
[INFO] [stderr]     |
[INFO] [stderr] 144 |             CONTEXT.line_to(stroke[i].0 as f64, stroke[i].1 as f64);
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[i].0)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:144:49
[INFO] [stderr]     |
[INFO] [stderr] 144 |             CONTEXT.line_to(stroke[i].0 as f64, stroke[i].1 as f64);
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[i].1)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/main.rs:159:8
[INFO] [stderr]     |
[INFO] [stderr] 159 |     if points.len() == 0{
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `points.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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/main.rs:214:17
[INFO] [stderr]     |
[INFO] [stderr] 214 |     let mut vec:Vec<(char, Vec<Vec<(u16, u16)>>)> = vec![];
[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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/main.rs:239:26
[INFO] [stderr]     |
[INFO] [stderr] 239 |             let strokes: Vec<(char, Vec<Vec<(u16, u16)>>)> = deserialize(&data).unwrap();
[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: length comparison to zero
[INFO] [stderr]    --> src/main.rs:297:16
[INFO] [stderr]     |
[INFO] [stderr] 297 |             if ch.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `ch.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: length comparison to zero
[INFO] [stderr]    --> src/main.rs:398:12
[INFO] [stderr]     |
[INFO] [stderr] 398 |         if ch.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `ch.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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/main.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |     static ref STROKES: Mutex<HashMap<char, Vec<Vec<(u16, u16)>>>> = Mutex::new(HashMap::new());
[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/main.rs:67:25
[INFO] [stderr]    |
[INFO] [stderr] 67 |     static ref STROKES: Mutex<HashMap<char, Vec<Vec<(u16, u16)>>>> = Mutex::new(HashMap::new());
[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: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:74:28
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let (width, height) = (CANVAS.width() as f64, CANVAS.height() as f64);
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(CANVAS.width())`
[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] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:74:51
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let (width, height) = (CANVAS.width() as f64, CANVAS.height() as f64);
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(CANVAS.height())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:113:17
[INFO] [stderr]     |
[INFO] [stderr] 113 |     CONTEXT.arc(pt.0 as f64, pt.1 as f64, 20.0, 0.0, 360.0, false);
[INFO] [stderr]     |                 ^^^^^^^^^^^ help: try: `f64::from(pt.0)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:113:30
[INFO] [stderr]     |
[INFO] [stderr] 113 |     CONTEXT.arc(pt.0 as f64, pt.1 as f64, 20.0, 0.0, 360.0, false);
[INFO] [stderr]     |                              ^^^^^^^^^^^ help: try: `f64::from(pt.1)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:142:25
[INFO] [stderr]     |
[INFO] [stderr] 142 |         CONTEXT.move_to(stroke[0].0 as f64, stroke[0].1 as f64);
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[0].0)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:142:45
[INFO] [stderr]     |
[INFO] [stderr] 142 |         CONTEXT.move_to(stroke[0].0 as f64, stroke[0].1 as f64);
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[0].1)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `stroke`.
[INFO] [stderr]    --> src/main.rs:143:18
[INFO] [stderr]     |
[INFO] [stderr] 143 |         for i in 1..stroke.len() {
[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] 143 |         for <item> in stroke.iter().skip(1) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:144:29
[INFO] [stderr]     |
[INFO] [stderr] 144 |             CONTEXT.line_to(stroke[i].0 as f64, stroke[i].1 as f64);
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[i].0)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:144:49
[INFO] [stderr]     |
[INFO] [stderr] 144 |             CONTEXT.line_to(stroke[i].0 as f64, stroke[i].1 as f64);
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^ help: try: `f64::from(stroke[i].1)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/main.rs:159:8
[INFO] [stderr]     |
[INFO] [stderr] 159 |     if points.len() == 0{
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `points.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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/main.rs:214:17
[INFO] [stderr]     |
[INFO] [stderr] 214 |     let mut vec:Vec<(char, Vec<Vec<(u16, u16)>>)> = vec![];
[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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]    --> src/main.rs:239:26
[INFO] [stderr]     |
[INFO] [stderr] 239 |             let strokes: Vec<(char, Vec<Vec<(u16, u16)>>)> = deserialize(&data).unwrap();
[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: length comparison to zero
[INFO] [stderr]    --> src/main.rs:297:16
[INFO] [stderr]     |
[INFO] [stderr] 297 |             if ch.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `ch.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: length comparison to zero
[INFO] [stderr]    --> src/main.rs:398:12
[INFO] [stderr]     |
[INFO] [stderr] 398 |         if ch.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `ch.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]     Finished dev [unoptimized + debuginfo] target(s) in 53.15s
[INFO] running `"docker" "inspect" "becdc08aeaaa3a0c231f2c29d16e2af2d233d0823f9583182ebbcb434b3fe013"`
[INFO] running `"docker" "rm" "-f" "becdc08aeaaa3a0c231f2c29d16e2af2d233d0823f9583182ebbcb434b3fe013"`
[INFO] [stdout] becdc08aeaaa3a0c231f2c29d16e2af2d233d0823f9583182ebbcb434b3fe013