[INFO] cloning repository https://github.com/ShounakDeshmukh/png_tools_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShounakDeshmukh/png_tools_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShounakDeshmukh%2Fpng_tools_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShounakDeshmukh%2Fpng_tools_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fb3d6f8442a545501825cdab153e5254cb8fae82
[INFO] checking ShounakDeshmukh/png_tools_rust against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShounakDeshmukh%2Fpng_tools_rust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShounakDeshmukh/png_tools_rust on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShounakDeshmukh/png_tools_rust
[INFO] finished tweaking git repo https://github.com/ShounakDeshmukh/png_tools_rust
[INFO] tweaked toml for git repo https://github.com/ShounakDeshmukh/png_tools_rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ShounakDeshmukh/png_tools_rust 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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking ShounakDeshmukh/png_tools_rust against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShounakDeshmukh%2Fpng_tools_rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShounakDeshmukh/png_tools_rust on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShounakDeshmukh/png_tools_rust
[INFO] finished tweaking git repo https://github.com/ShounakDeshmukh/png_tools_rust
[INFO] tweaked toml for git repo https://github.com/ShounakDeshmukh/png_tools_rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ShounakDeshmukh/png_tools_rust 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" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb26703e4482c88581d9b30de4b2533e9df55e7a83526f274e0d9b37d648aa56
[INFO] running `Command { std: "docker" "start" "-a" "fb26703e4482c88581d9b30de4b2533e9df55e7a83526f274e0d9b37d648aa56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb26703e4482c88581d9b30de4b2533e9df55e7a83526f274e0d9b37d648aa56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb26703e4482c88581d9b30de4b2533e9df55e7a83526f274e0d9b37d648aa56", kill_on_drop: false }`
[INFO] [stdout] fb26703e4482c88581d9b30de4b2533e9df55e7a83526f274e0d9b37d648aa56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f75596773484462fa3f3010d978bc40f4bcc71bd0ed724b8e25c44ba72a33ce7
[INFO] running `Command { std: "docker" "start" "-a" "f75596773484462fa3f3010d978bc40f4bcc71bd0ed724b8e25c44ba72a33ce7", kill_on_drop: false }`
[INFO] [stderr]     Checking crc-catalog v2.2.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking crc v3.0.1
[INFO] [stderr]     Checking png_tools v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/Headers.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 11 |             length: todo!(),
[INFO] [stdout]    |                     ------- any code following this expression is unreachable
[INFO] [stdout] 12 |             signature: todo!(),
[INFO] [stdout]    |                        ^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/Headers.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 32 |             image_height: todo!(),
[INFO] [stdout]    |                           ------- any code following this expression is unreachable
[INFO] [stdout] 33 |             image_width: todo!(),
[INFO] [stdout]    |                          ^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/Headers.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 11 |             length: todo!(),
[INFO] [stdout]    |                     ------- any code following this expression is unreachable
[INFO] [stdout] 12 |             signature: todo!(),
[INFO] [stdout]    |                        ^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/Headers.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 32 |             image_height: todo!(),
[INFO] [stdout]    |                           ------- any code following this expression is unreachable
[INFO] [stdout] 33 |             image_width: todo!(),
[INFO] [stdout]    |                          ^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img_h`
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let img_h: u32 = u32::from_be_bytes(buffer[0..4].try_into().unwrap());
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_img_h`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img_w`
[INFO] [stdout]   --> src/main.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let img_w: u32 = u32::from_be_bytes(buffer[4..8].try_into().unwrap());
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_img_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img_h`
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let img_h: u32 = u32::from_be_bytes(buffer[0..4].try_into().unwrap());
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_img_h`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bit_dep`
[INFO] [stdout]   --> src/main.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let bit_dep: u8 = u8::from_be(buffer[8]);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bit_dep`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `img_w`
[INFO] [stdout]   --> src/main.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let img_w: u32 = u32::from_be_bytes(buffer[4..8].try_into().unwrap());
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_img_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `colo_type`
[INFO] [stdout]   --> src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let colo_type: u8 = u8::from_be(buffer[9]);
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_colo_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `compress_meth`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let compress_meth: u8 = u8::from_be(buffer[10]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compress_meth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bit_dep`
[INFO] [stdout]   --> src/main.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let bit_dep: u8 = u8::from_be(buffer[8]);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_bit_dep`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filter_meth`
[INFO] [stdout]   --> src/main.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let filter_meth: u8 = u8::from_be(buffer[11]);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filter_meth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `colo_type`
[INFO] [stdout]   --> src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let colo_type: u8 = u8::from_be(buffer[9]);
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_colo_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interlace_meth`
[INFO] [stdout]   --> src/main.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let interlace_meth: u8 = u8::from_be(buffer[12]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interlace_meth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `compress_meth`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let compress_meth: u8 = u8::from_be(buffer[10]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compress_meth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filter_meth`
[INFO] [stdout]   --> src/main.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let filter_meth: u8 = u8::from_be(buffer[11]);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filter_meth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interlace_meth`
[INFO] [stdout]   --> src/main.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let interlace_meth: u8 = u8::from_be(buffer[12]);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interlace_meth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_data` is never used
[INFO] [stdout]   --> src/main.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn read_data() {}
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]  --> src/Headers.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Header {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/Headers.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Header {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn new() -> Header {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_data` is never used
[INFO] [stdout]   --> src/main.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn read_data() {}
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/Headers.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct IHDR {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 20 |     image_height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 21 |     image_width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 22 |     bit_depth: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 23 |     color_type: u8,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 24 |     compression_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 25 |     filter_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 26 |     interlace_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]  --> src/Headers.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Header {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IHDR_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const IHDR_HEX: &[u8] = "IHDR".as_bytes();
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/Headers.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Header {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn new() -> Header {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PLTE_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub const PLTE_HEX: [u8; 4] = [80, 76, 84, 69];
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IDAT_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const IDAT_HEX: [u8; 4] = [73, 68, 65, 84];
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IEND_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const IEND_HEX: [u8; 4] = [73, 69, 78, 68];
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/Headers.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct IHDR {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 20 |     image_height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 21 |     image_width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 22 |     bit_depth: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 23 |     color_type: u8,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 24 |     compression_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 25 |     filter_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 26 |     interlace_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Headers` should have a snake case name
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | mod Headers;
[INFO] [stdout]   |     ^^^^^^^ help: convert the identifier to snake case: `headers`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IHDR_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub const IHDR_HEX: &[u8] = "IHDR".as_bytes();
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PLTE_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub const PLTE_HEX: [u8; 4] = [80, 76, 84, 69];
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IDAT_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const IDAT_HEX: [u8; 4] = [73, 68, 65, 84];
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IEND_HEX` is never used
[INFO] [stdout]  --> src/constants.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const IEND_HEX: [u8; 4] = [73, 69, 78, 68];
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Headers` should have a snake case name
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | mod Headers;
[INFO] [stdout]   |     ^^^^^^^ help: convert the identifier to snake case: `headers`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "f75596773484462fa3f3010d978bc40f4bcc71bd0ed724b8e25c44ba72a33ce7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f75596773484462fa3f3010d978bc40f4bcc71bd0ed724b8e25c44ba72a33ce7", kill_on_drop: false }`
[INFO] [stdout] f75596773484462fa3f3010d978bc40f4bcc71bd0ed724b8e25c44ba72a33ce7
