[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] checking DaniilMarch/png_to_jpeg against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDaniilMarch%2Fpng_to_jpeg" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DaniilMarch/png_to_jpeg on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-4/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9f9404e4a46dc8f5c7c671fccb255ec08a4fae7768e7b9f40c802a0f5e3a84b
[INFO] running `Command { std: "docker" "start" "-a" "f9f9404e4a46dc8f5c7c671fccb255ec08a4fae7768e7b9f40c802a0f5e3a84b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9f9404e4a46dc8f5c7c671fccb255ec08a4fae7768e7b9f40c802a0f5e3a84b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9f9404e4a46dc8f5c7c671fccb255ec08a4fae7768e7b9f40c802a0f5e3a84b", kill_on_drop: false }`
[INFO] [stdout] f9f9404e4a46dc8f5c7c671fccb255ec08a4fae7768e7b9f40c802a0f5e3a84b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dbdbe17563771bfb93bf7fd04338ad4104f0588a34bdb85bff7808a69d34f34d
[INFO] running `Command { std: "docker" "start" "-a" "dbdbe17563771bfb93bf7fd04338ad4104f0588a34bdb85bff7808a69d34f34d", kill_on_drop: false }`
[INFO] [stderr]     Checking 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 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] [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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dbdbe17563771bfb93bf7fd04338ad4104f0588a34bdb85bff7808a69d34f34d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbdbe17563771bfb93bf7fd04338ad4104f0588a34bdb85bff7808a69d34f34d", kill_on_drop: false }`
[INFO] [stdout] dbdbe17563771bfb93bf7fd04338ad4104f0588a34bdb85bff7808a69d34f34d