[INFO] cloning repository https://github.com/markusdemedeiros/pngme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/markusdemedeiros/pngme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkusdemedeiros%2Fpngme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkusdemedeiros%2Fpngme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4e102de5b8e7f30be0a5b6870b991dbd11850a5f
[INFO] building markusdemedeiros/pngme against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarkusdemedeiros%2Fpngme" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/markusdemedeiros/pngme on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/markusdemedeiros/pngme
[INFO] finished tweaking git repo https://github.com/markusdemedeiros/pngme
[INFO] tweaked toml for git repo https://github.com/markusdemedeiros/pngme written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/markusdemedeiros/pngme 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ec042d26d854d747aefd6b5468cc3d9c6808c17c9723656744deff58bcd24ff
[INFO] running `Command { std: "docker" "start" "-a" "1ec042d26d854d747aefd6b5468cc3d9c6808c17c9723656744deff58bcd24ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ec042d26d854d747aefd6b5468cc3d9c6808c17c9723656744deff58bcd24ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ec042d26d854d747aefd6b5468cc3d9c6808c17c9723656744deff58bcd24ff", kill_on_drop: false }`
[INFO] [stdout] 1ec042d26d854d747aefd6b5468cc3d9c6808c17c9723656744deff58bcd24ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bef4c510680a945e3f5e8afa4bdb327c5d399cdfa05601a3104b58ee4e28ee1e
[INFO] running `Command { std: "docker" "start" "-a" "bef4c510680a945e3f5e8afa4bdb327c5d399cdfa05601a3104b58ee4e28ee1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc-catalog v1.1.1
[INFO] [stderr]    Compiling crc v2.1.0
[INFO] [stderr]    Compiling pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Chunk_IHDR` should have an upper camel case name
[INFO] [stdout]  --> src/chunk_spec.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Chunk_IHDR {
[INFO] [stdout]   |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChunkIhdr`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Chunk_IDAT` should have an upper camel case name
[INFO] [stdout]   --> src/chunk_spec.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Chunk_IDAT {}
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChunkIdat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Chunk_IEND` should have an upper camel case name
[INFO] [stdout]   --> src/chunk_spec.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Chunk_IEND {}
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChunkIend`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/png_util.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     io::{self, Read},
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/png_util.rs:7:46
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{chunk_type::ChunkType, png::Png, Error, Result};
[INFO] [stdout]   |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::once`
[INFO] [stdout]  --> src/png.rs:1:61
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{convert::TryFrom, convert::TryInto, fmt::Display, iter::once};
[INFO] [stdout]   |                                                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/png.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     chunk::{self, Chunk},
[INFO] [stdout]   |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/chunk_spec.rs:74:13
[INFO] [stdout]    |
[INFO] [stdout] 74 |             other => self.bit_depth,
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:11:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn throw_string_error(s: &'static str) -> Error {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `data`, `data_as_string`, and `as_bytes` are never used
[INFO] [stdout]    --> src/chunk.rs:65:12
[INFO] [stdout]     |
[INFO] [stdout] 61  | impl Chunk {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65  |     pub fn new(chunk_type: ChunkType, data: Vec<u8>) -> Chunk {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 88  |     pub fn data(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94  |     pub fn data_as_string(&self) -> Result<String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     pub fn as_bytes(&self) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ChunkSpec` is never used
[INFO] [stdout]  --> src/chunk_spec.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait ChunkSpec {
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk_IHDR` is never constructed
[INFO] [stdout]  --> src/chunk_spec.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Chunk_IHDR {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ColorType` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum ColorType {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CompressionMethod` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:25:6
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum CompressionMethod {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `FilterMethod` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum FilterMethod {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InterlaceMethod` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum InterlaceMethod {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pallate_used`, `color_used`, `alpha_used`, and `allowed_bit_depth` are never used
[INFO] [stdout]   --> src/chunk_spec.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl ColorType {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 41 |     fn pallate_used(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn color_used(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn alpha_used(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn allowed_bit_depth(self, depth: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sample_depth` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | impl Chunk_IHDR {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 71 |     fn sample_depth(self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk_IDAT` is never constructed
[INFO] [stdout]   --> src/chunk_spec.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Chunk_IDAT {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk_IEND` is never constructed
[INFO] [stdout]   --> src/chunk_spec.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Chunk_IEND {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_png` is never used
[INFO] [stdout]   --> src/png_util.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn read_png(filepath: &str) -> Result<Png> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chunk_headers` is never used
[INFO] [stdout]   --> src/png_util.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn chunk_headers(png: Png) -> Vec<ChunkType> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chunk_headers_show` is never used
[INFO] [stdout]   --> src/png_util.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn chunk_headers_show(png: Png) -> Vec<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/png.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Png {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout] 48 |     pub const STANDARD_HEADER: [u8; 8] = [137, 80, 78, 71, 13, 10, 26, 10];
[INFO] [stdout] 49 |     pub fn from_chunks(chunks: Vec<Chunk>) -> Png {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn append_chunk(&mut self, chunk: Chunk) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn remove_chunk(&mut self, chunk_type: &str) -> Result<Chunk> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn chunks(&self) -> &[Chunk] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn chunk_by_type(&self, chunk_type: &str) -> Option<&Chunk> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |     pub fn as_bytes(&self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "bef4c510680a945e3f5e8afa4bdb327c5d399cdfa05601a3104b58ee4e28ee1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bef4c510680a945e3f5e8afa4bdb327c5d399cdfa05601a3104b58ee4e28ee1e", kill_on_drop: false }`
[INFO] [stdout] bef4c510680a945e3f5e8afa4bdb327c5d399cdfa05601a3104b58ee4e28ee1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed7c104618c805d96f06892d6085338816c3cfd1d465ad0965ea9d658a83965e
[INFO] running `Command { std: "docker" "start" "-a" "ed7c104618c805d96f06892d6085338816c3cfd1d465ad0965ea9d658a83965e", kill_on_drop: false }`
[INFO] [stderr]    Compiling pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Chunk_IHDR` should have an upper camel case name
[INFO] [stdout]  --> src/chunk_spec.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Chunk_IHDR {
[INFO] [stdout]   |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChunkIhdr`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Chunk_IDAT` should have an upper camel case name
[INFO] [stdout]   --> src/chunk_spec.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Chunk_IDAT {}
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChunkIdat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Chunk_IEND` should have an upper camel case name
[INFO] [stdout]   --> src/chunk_spec.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Chunk_IEND {}
[INFO] [stdout]    |        ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChunkIend`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/png_util.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     io::{self, Read},
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/png_util.rs:7:46
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{chunk_type::ChunkType, png::Png, Error, Result};
[INFO] [stdout]   |                                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::once`
[INFO] [stdout]  --> src/png.rs:1:61
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{convert::TryFrom, convert::TryInto, fmt::Display, iter::once};
[INFO] [stdout]   |                                                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/png.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     chunk::{self, Chunk},
[INFO] [stdout]   |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/chunk_spec.rs:74:13
[INFO] [stdout]    |
[INFO] [stdout] 74 |             other => self.bit_depth,
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:11:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn throw_string_error(s: &'static str) -> Error {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ChunkSpec` is never used
[INFO] [stdout]  --> src/chunk_spec.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait ChunkSpec {
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk_IHDR` is never constructed
[INFO] [stdout]  --> src/chunk_spec.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Chunk_IHDR {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ColorType` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum ColorType {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CompressionMethod` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:25:6
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum CompressionMethod {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `FilterMethod` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum FilterMethod {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `InterlaceMethod` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum InterlaceMethod {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pallate_used`, `color_used`, `alpha_used`, and `allowed_bit_depth` are never used
[INFO] [stdout]   --> src/chunk_spec.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl ColorType {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 41 |     fn pallate_used(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn color_used(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn alpha_used(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn allowed_bit_depth(self, depth: u8) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sample_depth` is never used
[INFO] [stdout]   --> src/chunk_spec.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | impl Chunk_IHDR {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 71 |     fn sample_depth(self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk_IDAT` is never constructed
[INFO] [stdout]   --> src/chunk_spec.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Chunk_IDAT {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk_IEND` is never constructed
[INFO] [stdout]   --> src/chunk_spec.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Chunk_IEND {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chunk_headers` is never used
[INFO] [stdout]   --> src/png_util.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn chunk_headers(png: Png) -> Vec<ChunkType> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `header` is never used
[INFO] [stdout]   --> src/png.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Png {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "ed7c104618c805d96f06892d6085338816c3cfd1d465ad0965ea9d658a83965e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed7c104618c805d96f06892d6085338816c3cfd1d465ad0965ea9d658a83965e", kill_on_drop: false }`
[INFO] [stdout] ed7c104618c805d96f06892d6085338816c3cfd1d465ad0965ea9d658a83965e