[INFO] cloning repository https://github.com/DaniilMarch/png_to_jpeg
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DaniilMarch/png_to_jpeg" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDaniilMarch%2Fpng_to_jpeg", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDaniilMarch%2Fpng_to_jpeg'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1299aa44e063ca9838fded6ed0241bd2a363e82
[INFO] testing DaniilMarch/png_to_jpeg against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDaniilMarch%2Fpng_to_jpeg" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DaniilMarch/png_to_jpeg on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DaniilMarch/png_to_jpeg
[INFO] finished tweaking git repo https://github.com/DaniilMarch/png_to_jpeg
[INFO] tweaked toml for git repo https://github.com/DaniilMarch/png_to_jpeg written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/DaniilMarch/png_to_jpeg already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e29c6df49c16d2f44bb7a789bc51987a5b5fd2b2c1fe4dd4dfc7359a232a379d
[INFO] running `Command { std: "docker" "start" "-a" "e29c6df49c16d2f44bb7a789bc51987a5b5fd2b2c1fe4dd4dfc7359a232a379d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e29c6df49c16d2f44bb7a789bc51987a5b5fd2b2c1fe4dd4dfc7359a232a379d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e29c6df49c16d2f44bb7a789bc51987a5b5fd2b2c1fe4dd4dfc7359a232a379d", kill_on_drop: false }`
[INFO] [stdout] e29c6df49c16d2f44bb7a789bc51987a5b5fd2b2c1fe4dd4dfc7359a232a379d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39f089ae7dcc71db97f329edaf3cd712cb48c27c17548e5aa519d49675d3f72e
[INFO] running `Command { std: "docker" "start" "-a" "39f089ae7dcc71db97f329edaf3cd712cb48c27c17548e5aa519d49675d3f72e", kill_on_drop: false }`
[INFO] [stderr]    Compiling png_to_jpeg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::prelude::*`
[INFO] [stdout]  --> src/png/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Mul`
[INFO] [stdout]  --> src/util/mod.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::{Add, Mul};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `png`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let png: Png = Png::new("test.png");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_png`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]  --> src/png/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     width: u32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]  --> src/png/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     height: u32,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bit_depth`
[INFO] [stdout]  --> src/png/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     bit_depth: u8,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `color_type`
[INFO] [stdout]   --> src/png/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     color_type: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `compression_method`
[INFO] [stdout]   --> src/png/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     compression_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `filter_method`
[INFO] [stdout]   --> src/png/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     filter_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `interlace_method`
[INFO] [stdout]   --> src/png/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     interlace_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/png/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ihdr`
[INFO] [stdout]   --> src/png/mod.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     ihdr: IHDR,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `filepath`
[INFO] [stdout]   --> src/png/mod.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     filepath: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         file.read(&mut signature_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         file.read(&mut ihdr_chunk_length_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         file.read(&mut ihdr_type_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |         file.read(&mut ihdr_chunk_data_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "39f089ae7dcc71db97f329edaf3cd712cb48c27c17548e5aa519d49675d3f72e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39f089ae7dcc71db97f329edaf3cd712cb48c27c17548e5aa519d49675d3f72e", kill_on_drop: false }`
[INFO] [stdout] 39f089ae7dcc71db97f329edaf3cd712cb48c27c17548e5aa519d49675d3f72e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cc1f948d6cee043c3377ebd819e76aaa08949b583eb6217eb1e02d40be1b403
[INFO] running `Command { std: "docker" "start" "-a" "7cc1f948d6cee043c3377ebd819e76aaa08949b583eb6217eb1e02d40be1b403", kill_on_drop: false }`
[INFO] [stderr]    Compiling png_to_jpeg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::prelude::*`
[INFO] [stdout]  --> src/png/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Mul`
[INFO] [stdout]  --> src/util/mod.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::{Add, Mul};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `png`
[INFO] [stdout]  --> src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let png: Png = Png::new("test.png");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_png`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]  --> src/png/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     width: u32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]  --> src/png/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     height: u32,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bit_depth`
[INFO] [stdout]  --> src/png/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     bit_depth: u8,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `color_type`
[INFO] [stdout]   --> src/png/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     color_type: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `compression_method`
[INFO] [stdout]   --> src/png/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     compression_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `filter_method`
[INFO] [stdout]   --> src/png/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     filter_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `interlace_method`
[INFO] [stdout]   --> src/png/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     interlace_method: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/png/mod.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ihdr`
[INFO] [stdout]   --> src/png/mod.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     ihdr: IHDR,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `filepath`
[INFO] [stdout]   --> src/png/mod.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     filepath: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         file.read(&mut signature_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         file.read(&mut ihdr_chunk_length_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         file.read(&mut ihdr_type_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/png/mod.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |         file.read(&mut ihdr_chunk_data_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "7cc1f948d6cee043c3377ebd819e76aaa08949b583eb6217eb1e02d40be1b403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cc1f948d6cee043c3377ebd819e76aaa08949b583eb6217eb1e02d40be1b403", kill_on_drop: false }`
[INFO] [stdout] 7cc1f948d6cee043c3377ebd819e76aaa08949b583eb6217eb1e02d40be1b403
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8b4f6490fe55a282e341b871d764e12db72e40afabf349e82634e906fd4181bd
[INFO] running `Command { std: "docker" "start" "-a" "8b4f6490fe55a282e341b871d764e12db72e40afabf349e82634e906fd4181bd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `std::prelude::*`
[INFO] [stderr]  --> src/png/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Add`, `Mul`
[INFO] [stderr]  --> src/util/mod.rs:2:16
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ops::{Add, Mul};
[INFO] [stderr]   |                ^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `png`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let png: Png = Png::new("test.png");
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_png`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `width`
[INFO] [stderr]  --> src/png/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     width: u32,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `height`
[INFO] [stderr]  --> src/png/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     height: u32,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `bit_depth`
[INFO] [stderr]  --> src/png/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     bit_depth: u8,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `color_type`
[INFO] [stderr]   --> src/png/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     color_type: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `compression_method`
[INFO] [stderr]   --> src/png/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     compression_method: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `filter_method`
[INFO] [stderr]   --> src/png/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     filter_method: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `interlace_method`
[INFO] [stderr]   --> src/png/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     interlace_method: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/png/mod.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ihdr`
[INFO] [stderr]   --> src/png/mod.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     ihdr: IHDR,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `filepath`
[INFO] [stderr]   --> src/png/mod.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     filepath: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/png/mod.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         file.read(&mut signature_buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/png/mod.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         file.read(&mut ihdr_chunk_length_buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/png/mod.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         file.read(&mut ihdr_type_buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/png/mod.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |         file.read(&mut ihdr_chunk_data_buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `png_to_jpeg` (bin "png_to_jpeg" test) generated 17 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/png_to_jpeg-c01cda1f52ebf6bc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8b4f6490fe55a282e341b871d764e12db72e40afabf349e82634e906fd4181bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b4f6490fe55a282e341b871d764e12db72e40afabf349e82634e906fd4181bd", kill_on_drop: false }`
[INFO] [stdout] 8b4f6490fe55a282e341b871d764e12db72e40afabf349e82634e906fd4181bd