[INFO] cloning repository https://github.com/artursapek/pretty-pictures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/artursapek/pretty-pictures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fartursapek%2Fpretty-pictures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fartursapek%2Fpretty-pictures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 388ae585d7820b2fbd1f285f6f64b4dd1ce150f3
[INFO] checking artursapek/pretty-pictures against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fartursapek%2Fpretty-pictures" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/artursapek/pretty-pictures
[INFO] finished tweaking git repo https://github.com/artursapek/pretty-pictures
[INFO] tweaked toml for git repo https://github.com/artursapek/pretty-pictures written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/artursapek/pretty-pictures on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/artursapek/pretty-pictures already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.9.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6da9e16f22ca51f6b52e528d18985db5d6f8c9a56eb3f2f916b42149e9eefe05
[INFO] running `Command { std: "docker" "start" "-a" "6da9e16f22ca51f6b52e528d18985db5d6f8c9a56eb3f2f916b42149e9eefe05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6da9e16f22ca51f6b52e528d18985db5d6f8c9a56eb3f2f916b42149e9eefe05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6da9e16f22ca51f6b52e528d18985db5d6f8c9a56eb3f2f916b42149e9eefe05", kill_on_drop: false }`
[INFO] [stdout] 6da9e16f22ca51f6b52e528d18985db5d6f8c9a56eb3f2f916b42149e9eefe05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e3e543eb7baad1551228856a9e79e747f92c14388d36df28b7fd283755fc2ad
[INFO] running `Command { std: "docker" "start" "-a" "7e3e543eb7baad1551228856a9e79e747f92c14388d36df28b7fd283755fc2ad", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]    Compiling rayon-core v1.10.1
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]    Compiling pin-project-internal v1.0.12
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking bytemuck v1.12.3
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rayon v1.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking pin-project v1.0.12
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.5.2
[INFO] [stderr]     Checking jpeg-decoder v0.3.0
[INFO] [stderr]     Checking tiff v0.8.1
[INFO] [stderr]     Checking image v0.24.5
[INFO] [stderr]     Checking pics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: denote infinite loops with `loop { ... }`
[INFO] [stdout]    --> src/main.rs:258:5
[INFO] [stdout]     |
[INFO] [stdout] 258 |     'mainLoop: while true {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: use `loop`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(while_true)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: denote infinite loops with `loop { ... }`
[INFO] [stdout]    --> src/main.rs:258:5
[INFO] [stdout]     |
[INFO] [stdout] 258 |     'mainLoop: while true {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: use `loop`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(while_true)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 255 |     let mut x = w as usize / 2;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 |     let mut y = w as usize / 2;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:244:10
[INFO] [stdout]     |
[INFO] [stdout] 244 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:244:13
[INFO] [stdout]     |
[INFO] [stdout] 244 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:249:10
[INFO] [stdout]     |
[INFO] [stdout] 249 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 255 |     let mut x = w as usize / 2;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 |     let mut y = w as usize / 2;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `blend` and `swap` are never used
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Canvas {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn blend(&mut self, x: u32, y: u32, color: [u8; 4]) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn swap(&mut self, x: u32, y: u32, x2: u32, y2: u32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         x >= 0 && x < self.width && y >= 0 && y < self.height
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/main.rs:23:37
[INFO] [stdout]    |
[INFO] [stdout] 23 |         x >= 0 && x < self.width && y >= 0 && y < self.height
[INFO] [stdout]    |                                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 255 |     let mut x = w as usize / 2;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 |     let mut y = w as usize / 2;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:244:10
[INFO] [stdout]     |
[INFO] [stdout] 244 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:244:13
[INFO] [stdout]     |
[INFO] [stdout] 244 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:249:10
[INFO] [stdout]     |
[INFO] [stdout] 249 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |     for (x, y, pixel) in canvas.buffer.enumerate_pixels_mut() {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:255:9
[INFO] [stdout]     |
[INFO] [stdout] 255 |     let mut x = w as usize / 2;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 |     let mut y = w as usize / 2;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `blend` and `swap` are never used
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Canvas {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn blend(&mut self, x: u32, y: u32, color: [u8; 4]) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn swap(&mut self, x: u32, y: u32, x2: u32, y2: u32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         x >= 0 && x < self.width && y >= 0 && y < self.height
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/main.rs:23:37
[INFO] [stdout]    |
[INFO] [stdout] 23 |         x >= 0 && x < self.width && y >= 0 && y < self.height
[INFO] [stdout]    |                                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         drop(a);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 51 -         drop(a);
[INFO] [stdout] 51 +         let _ = a;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         drop(b);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 55 -         drop(b);
[INFO] [stdout] 55 +         let _ = b;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         drop(a);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 59 -         drop(a);
[INFO] [stdout] 59 +         let _ = a;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         drop(b);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 63 -         drop(b);
[INFO] [stdout] 63 +         let _ = b;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |         posn.x >= 0 && posn.y >= 0 && posn.x < self.width && posn.y < self.height
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:172:24
[INFO] [stdout]     |
[INFO] [stdout] 172 |         posn.x >= 0 && posn.y >= 0 && posn.x < self.width && posn.y < self.height
[INFO] [stdout]     |                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         drop(a);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 51 -         drop(a);
[INFO] [stdout] 51 +         let _ = a;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         drop(b);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 55 -         drop(b);
[INFO] [stdout] 55 +         let _ = b;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         drop(a);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 59 -         drop(a);
[INFO] [stdout] 59 +         let _ = a;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         drop(b);
[INFO] [stdout]    |         ^^^^^-^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `&mut Rgba<u8>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 63 -         drop(b);
[INFO] [stdout] 63 +         let _ = b;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |         posn.x >= 0 && posn.y >= 0 && posn.x < self.width && posn.y < self.height
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:172:24
[INFO] [stdout]     |
[INFO] [stdout] 172 |         posn.x >= 0 && posn.y >= 0 && posn.x < self.width && posn.y < self.height
[INFO] [stdout]     |                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.32s
[INFO] running `Command { std: "docker" "inspect" "7e3e543eb7baad1551228856a9e79e747f92c14388d36df28b7fd283755fc2ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3e543eb7baad1551228856a9e79e747f92c14388d36df28b7fd283755fc2ad", kill_on_drop: false }`
[INFO] [stdout] 7e3e543eb7baad1551228856a9e79e747f92c14388d36df28b7fd283755fc2ad
