[INFO] crate rtrace 1.0.0 is already in cache
[INFO] extracting crate rtrace 1.0.0 into work/ex/clippy-test-run/sources/stable/reg/rtrace/1.0.0
[INFO] extracting crate rtrace 1.0.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rtrace/1.0.0
[INFO] validating manifest of rtrace-1.0.0 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 rtrace-1.0.0 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 rtrace-1.0.0
[INFO] finished frobbing rtrace-1.0.0
[INFO] frobbed toml for rtrace-1.0.0 written to work/ex/clippy-test-run/sources/stable/reg/rtrace/1.0.0/Cargo.toml
[INFO] started frobbing rtrace-1.0.0
[INFO] finished frobbing rtrace-1.0.0
[INFO] frobbed toml for rtrace-1.0.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rtrace/1.0.0/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 rtrace-1.0.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/rtrace/1.0.0:/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] 6c44ebeceea73ff4f971c77d143a7b12083d100435e77cdca48bd5e9698d2236
[INFO] running `"docker" "start" "-a" "6c44ebeceea73ff4f971c77d143a7b12083d100435e77cdca48bd5e9698d2236"`
[INFO] [stderr]     Checking rtrace v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/rust/primitive.rs:139:13
[INFO] [stderr]     |
[INFO] [stderr] 139 |             dir: dir,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `dir`
[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: 5th binding whose name is just one char
[INFO] [stderr]   --> src/rust/render.rs:98:17
[INFO] [stderr]    |
[INFO] [stderr] 98 |             let r = 0.5 + 255.0 * v;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/rust/render.rs:194:13
[INFO] [stderr]     |
[INFO] [stderr] 194 |         let g = h.pos.dot(&s.directional_light);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/rust/render.rs:199:13
[INFO] [stderr]     |
[INFO] [stderr] 199 |         let p = r.pos + (r.dir.mulfed(h.distance)) + *h.pos.mulf(h.distance * f32::EPSILON.sqrt());
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/rust/primitive.rs:139:13
[INFO] [stderr]     |
[INFO] [stderr] 139 |             dir: dir,
[INFO] [stderr]     |             ^^^^^^^^ help: replace it with: `dir`
[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: 5th binding whose name is just one char
[INFO] [stderr]   --> src/rust/render.rs:98:17
[INFO] [stderr]    |
[INFO] [stderr] 98 |             let r = 0.5 + 255.0 * v;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/rust/render.rs:194:13
[INFO] [stderr]     |
[INFO] [stderr] 194 |         let g = h.pos.dot(&s.directional_light);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/rust/render.rs:199:13
[INFO] [stderr]     |
[INFO] [stderr] 199 |         let p = r.pos + (r.dir.mulfed(h.distance)) + *h.pos.mulf(h.distance * f32::EPSILON.sqrt());
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/rust/render.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         return o.l >= self.l && o.b >= self.b && o.t <= self.t && o.r <= self.r;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `o.l >= self.l && o.b >= self.b && o.t <= self.t && o.r <= self.r`
[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: Closure called just once immediately after it was declared
[INFO] [stderr]    --> src/rust/render.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |         c[0] = scale(p.x);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_closure_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure_call
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/rust/render.rs:210:13
[INFO] [stderr]     |
[INFO] [stderr] 210 |             return 1.0;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: remove `return` as shown: `1.0`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/rust/render.rs:213:13
[INFO] [stderr]     |
[INFO] [stderr] 213 |             return 0.0;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: remove `return` as shown: `0.0`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/rust/vec.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         self.x = self.x * m;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.x *= m`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/rust/vec.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |         self.y = self.y * m;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.y *= m`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/rust/vec.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         self.z = self.z * m;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.z *= m`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:51:18
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn width(&self) -> u16 {
[INFO] [stderr]    |                  ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:55:19
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn height(&self) -> u16 {
[INFO] [stderr]    |                   ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn area(&self) -> usize {
[INFO] [stderr]    |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:63:21
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn contains(&self, o: &ImageRegion) -> bool {
[INFO] [stderr]    |                     ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:63:31
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn contains(&self, o: &ImageRegion) -> bool {
[INFO] [stderr]    |                               ^^^^^^^^^^^^ help: consider passing by value instead: `ImageRegion`
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    |
[INFO] [stderr]  --> src/rust/lib.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]   |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn buffer_offset(&self, x: u16, y: u16) -> usize {
[INFO] [stderr]    |                          ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/rust/render.rs:80:15
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn new(r: &ImageRegion) -> RGBABuffer {
[INFO] [stderr]    |               ^^^^^^^^^^^^ help: consider passing by value instead: `ImageRegion`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/rust/render.rs:218:29
[INFO] [stderr]     |
[INFO] [stderr] 218 |     pub fn render_region(o: &RenderOptions, scene: &Scene, buf: &mut RGBABuffer) {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^ help: consider passing by value instead: `RenderOptions`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: casting u16 to f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:219:19
[INFO] [stderr]     |
[INFO] [stderr] 219 |         let ssf = o.samples_per_pixel as RFloat;
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f32::from(o.samples_per_pixel)`
[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 u16 to f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:223:21
[INFO] [stderr]     |
[INFO] [stderr] 223 |         let width = o.width as RFloat;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^ help: try: `f32::from(o.width)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:224:22
[INFO] [stderr]     |
[INFO] [stderr] 224 |         let height = o.height as RFloat;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^ help: try: `f32::from(o.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 f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:238:36
[INFO] [stderr]     |
[INFO] [stderr] 238 |                         let xres = x as RFloat + ssx as RFloat / ssf;
[INFO] [stderr]     |                                    ^^^^^^^^^^^ help: try: `f32::from(x)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:238:50
[INFO] [stderr]     |
[INFO] [stderr] 238 |                         let xres = x as RFloat + ssx as RFloat / ssf;
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^ help: try: `f32::from(ssx)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:239:36
[INFO] [stderr]     |
[INFO] [stderr] 239 |                         let yres = y as RFloat + ssy as RFloat / ssf;
[INFO] [stderr]     |                                    ^^^^^^^^^^^ help: try: `f32::from(y)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:239:50
[INFO] [stderr]     |
[INFO] [stderr] 239 |                         let yres = y as RFloat + ssy as RFloat / ssf;
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^ help: try: `f32::from(ssy)`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/rust/render.rs:260:22
[INFO] [stderr]     |
[INFO] [stderr] 260 |     pub fn render(o: &RenderOptions,
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^ help: consider passing by value instead: `RenderOptions`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
[INFO] [stderr]    --> src/rust/render.rs:293:21
[INFO] [stderr]     |
[INFO] [stderr] 293 |                     tx.send(b).ok().expect("Channel should be open !");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ok_expect)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ok_expect
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rtrace`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: casting u8 to f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:399:29
[INFO] [stderr]     |
[INFO] [stderr] 399 |                 let avg = ((b[0] as f32 + b[1] as f32 + b[2] as f32) / 3.0f32) as u8;
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `f32::from(b[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 u8 to f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:399:43
[INFO] [stderr]     |
[INFO] [stderr] 399 |                 let avg = ((b[0] as f32 + b[1] as f32 + b[2] as f32) / 3.0f32) as u8;
[INFO] [stderr]     |                                           ^^^^^^^^^^^ help: try: `f32::from(b[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 u8 to f32 may become silently lossy if types change
[INFO] [stderr]    --> src/rust/render.rs:399:57
[INFO] [stderr]     |
[INFO] [stderr] 399 |                 let avg = ((b[0] as f32 + b[1] as f32 + b[2] as f32) / 3.0f32) as u8;
[INFO] [stderr]     |                                                         ^^^^^^^^^^^ help: try: `f32::from(b[2])`
[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] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]    --> src/rust/render.rs:400:17
[INFO] [stderr]     |
[INFO] [stderr] 400 |                 out.write(&[avg]).unwrap();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::unused_io_amount)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rtrace`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6c44ebeceea73ff4f971c77d143a7b12083d100435e77cdca48bd5e9698d2236"`
[INFO] running `"docker" "rm" "-f" "6c44ebeceea73ff4f971c77d143a7b12083d100435e77cdca48bd5e9698d2236"`
[INFO] [stdout] 6c44ebeceea73ff4f971c77d143a7b12083d100435e77cdca48bd5e9698d2236