[INFO] cloning repository https://github.com/rukarangi/png_decoder_rukarangi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rukarangi/png_decoder_rukarangi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukarangi%2Fpng_decoder_rukarangi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukarangi%2Fpng_decoder_rukarangi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf9df1c65f1b92172c96f9170e8cba019ecb7a21
[INFO] checking rukarangi/png_decoder_rukarangi against try#0c70cfbec949d241375e31c5a42066be70c720fc for pr-149681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukarangi%2Fpng_decoder_rukarangi" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rukarangi/png_decoder_rukarangi
[INFO] finished tweaking git repo https://github.com/rukarangi/png_decoder_rukarangi
[INFO] tweaked toml for git repo https://github.com/rukarangi/png_decoder_rukarangi written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rukarangi/png_decoder_rukarangi on toolchain 0c70cfbec949d241375e31c5a42066be70c720fc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rukarangi/png_decoder_rukarangi 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" "+0c70cfbec949d241375e31c5a42066be70c720fc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b40ecf1793d9778ba36f4c46c9e204ab1ef4fa5721c35ebaf293baf791513274
[INFO] running `Command { std: "docker" "start" "-a" "b40ecf1793d9778ba36f4c46c9e204ab1ef4fa5721c35ebaf293baf791513274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b40ecf1793d9778ba36f4c46c9e204ab1ef4fa5721c35ebaf293baf791513274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b40ecf1793d9778ba36f4c46c9e204ab1ef4fa5721c35ebaf293baf791513274", kill_on_drop: false }`
[INFO] [stdout] b40ecf1793d9778ba36f4c46c9e204ab1ef4fa5721c35ebaf293baf791513274
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bb5291df2c02d1a856055547324520a424e81930a974130399341bddc8e2167
[INFO] running `Command { std: "docker" "start" "-a" "5bb5291df2c02d1a856055547324520a424e81930a974130399341bddc8e2167", kill_on_drop: false }`
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking png_get_pixels v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | /     match filter {
[INFO] [stdout] 147 | |         0 => return Ok(data[target]),
[INFO] [stdout] 148 | |         _ => return Err("This filter type is not implemented"),
[INFO] [stdout] 149 | |     }
[INFO] [stdout]     | |_____- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 150 |
[INFO] [stdout] 151 |       Ok(0x0)
[INFO] [stdout]     |       ^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | /     match filter {
[INFO] [stdout] 147 | |         0 => return Ok(data[target]),
[INFO] [stdout] 148 | |         _ => return Err("This filter type is not implemented"),
[INFO] [stdout] 149 | |     }
[INFO] [stdout]     | |_____- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 150 |
[INFO] [stdout] 151 |       Ok(0x0)
[INFO] [stdout]     |       ^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byte`
[INFO] [stdout]   --> src/main.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     for (idx, byte) in buf.iter().enumerate() {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_byte`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byte`
[INFO] [stdout]   --> src/main.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     for (idx, byte) in buf.iter().enumerate() {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_byte`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dimension2_shiz`
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let dimension2_shiz = become_2d(&dat_inflated, width as usize, height as usize);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dimension2_shiz`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dimension2_shiz`
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let dimension2_shiz = become_2d(&dat_inflated, width as usize, height as usize);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dimension2_shiz`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pixels`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let pixels: Vec<Pixel> = pixel_maker(dat_inflated, width, height, bit_depth, color_type);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_pixels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pixels`
[INFO] [stdout]   --> src/main.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let pixels: Vec<Pixel> = pixel_maker(dat_inflated, width, height, bit_depth, color_type);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_pixels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut output: Vec<Vec<u8>> = Vec::new();
[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:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut output: Vec<Vec<u8>> = Vec::new();
[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: unused variable: `data`
[INFO] [stdout]    --> src/main.rs:104:14
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn become_2d(data: &Vec<u8>, width: usize, height: usize) -> Vec<Vec<u8>> {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/main.rs:104:14
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn become_2d(data: &Vec<u8>, width: usize, height: usize) -> Vec<Vec<u8>> {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     for y in 0..height {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     for y in 0..height {
[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:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |         for x in 0..width {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |         for x in 0..width {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]    --> src/main.rs:116:43
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn pixel_maker(data: Vec<u8>, width: u32, height: u32, bit_depth: u8, color_type: u8) -> Vec<Pixel> {
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]    --> src/main.rs:116:43
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn pixel_maker(data: Vec<u8>, width: u32, height: u32, bit_depth: u8, color_type: u8) -> Vec<Pixel> {
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `good_byte`
[INFO] [stdout]    --> src/main.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |         let good_byte = match apply_filter(filter, &data, 32, idx, bit_depth, color_type) {
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_good_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `good_byte`
[INFO] [stdout]    --> src/main.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |         let good_byte = match apply_filter(filter, &data, 32, idx, bit_depth, color_type) {
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_good_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bit_depth`
[INFO] [stdout]    --> src/main.rs:139:75
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn apply_filter(filter: u8, data: &Vec<u8>, length: usize, target: usize, bit_depth: u8, color_type: u8) -> Result<u8, &'static str> {
[INFO] [stdout]     |                                                                           ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bit_depth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bit_depth`
[INFO] [stdout]    --> src/main.rs:139:75
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn apply_filter(filter: u8, data: &Vec<u8>, length: usize, target: usize, bit_depth: u8, color_type: u8) -> Result<u8, &'static str> {
[INFO] [stdout]     |                                                                           ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bit_depth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HEADER` is never used
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const HEADER: [u8; 8] = [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a];
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HEADER` is never used
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const HEADER: [u8; 8] = [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a];
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `r`, `g`, `b`, and `a` are never read
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Pixel {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 15 |     r: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 16 |     g: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 17 |     b: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 18 |     a: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Pixel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `r`, `g`, `b`, and `a` are never read
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Pixel {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 15 |     r: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 16 |     g: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 17 |     b: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 18 |     a: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Pixel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `pixels` are never read
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Output {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 23 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 24 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 25 |     pixels: Vec<Pixel>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Output` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `pixels` are never read
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Output {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 23 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 24 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 25 |     pixels: Vec<Pixel>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Output` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "5bb5291df2c02d1a856055547324520a424e81930a974130399341bddc8e2167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bb5291df2c02d1a856055547324520a424e81930a974130399341bddc8e2167", kill_on_drop: false }`
[INFO] [stdout] 5bb5291df2c02d1a856055547324520a424e81930a974130399341bddc8e2167
