[INFO] fetching crate stego_rust 0.1.0...
[INFO] testing stego_rust-0.1.0 against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] extracting crate stego_rust 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate stego_rust 0.1.0
[INFO] finished tweaking crates.io crate stego_rust 0.1.0
[INFO] tweaked toml for crates.io crate stego_rust 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate stego_rust 0.1.0 on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stego_rust 0.1.0 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" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bda7af2d2de72d813dc386a926a5eeca18c11270f7be81ce31a926beab5813e5
[INFO] running `Command { std: "docker" "start" "-a" "bda7af2d2de72d813dc386a926a5eeca18c11270f7be81ce31a926beab5813e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bda7af2d2de72d813dc386a926a5eeca18c11270f7be81ce31a926beab5813e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bda7af2d2de72d813dc386a926a5eeca18c11270f7be81ce31a926beab5813e5", kill_on_drop: false }`
[INFO] [stdout] bda7af2d2de72d813dc386a926a5eeca18c11270f7be81ce31a926beab5813e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c9bf5d5cb394b22fd71c5bbbf58d0a4b5101d718cf0f542a156d0ab4b38a106
[INFO] running `Command { std: "docker" "start" "-a" "1c9bf5d5cb394b22fd71c5bbbf58d0a4b5101d718cf0f542a156d0ab4b38a106", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling simd-adler32 v0.3.7
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling inout v0.1.4
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling smallvec v1.15.0
[INFO] [stderr]    Compiling weezl v0.1.8
[INFO] [stderr]    Compiling libsqlite3-sys v0.26.0
[INFO] [stderr]    Compiling half v2.6.0
[INFO] [stderr]    Compiling lebe v0.5.2
[INFO] [stderr]    Compiling bytemuck v1.22.0
[INFO] [stderr]    Compiling bit_field v0.10.2
[INFO] [stderr]    Compiling is-terminal v0.4.16
[INFO] [stderr]    Compiling jpeg-decoder v0.3.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling miniz_oxide v0.8.8
[INFO] [stderr]    Compiling fdeflate v0.3.7
[INFO] [stderr]    Compiling zune-inflate v0.2.54
[INFO] [stderr]    Compiling gif v0.13.1
[INFO] [stderr]    Compiling qoi v0.4.1
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling cipher v0.4.4
[INFO] [stderr]    Compiling universal-hash v0.5.1
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling aead v0.5.2
[INFO] [stderr]    Compiling flate2 v1.1.1
[INFO] [stderr]    Compiling exr v1.73.0
[INFO] [stderr]    Compiling polyval v0.6.2
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]    Compiling aes v0.8.4
[INFO] [stderr]    Compiling ctr v0.9.2
[INFO] [stderr]    Compiling ghash v0.5.1
[INFO] [stderr]    Compiling hashlink v0.8.4
[INFO] [stderr]    Compiling aes-gcm v0.10.3
[INFO] [stderr]    Compiling png v0.17.16
[INFO] [stderr]    Compiling tiff v0.9.1
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling image v0.24.9
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_logger v0.10.2
[INFO] [stderr]    Compiling rusqlite v0.29.0
[INFO] [stderr]    Compiling stego_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `DynamicImage` and `ImageBuffer`
[INFO] [stdout]  --> src/core/encoder.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::{DynamicImage, GenericImageView, ImageBuffer, RgbImage};
[INFO] [stdout]   |             ^^^^^^^^^^^^                    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]  --> src/core/encoder.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{random, Rng};
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/core/encoder.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufWriter`
[INFO] [stdout]   --> src/core/encoder.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::BufWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Compression`, `Encoder`, and `FilterType`
[INFO] [stdout]   --> src/core/encoder.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | use png::{Encoder, Compression, FilterType};
[INFO] [stdout]    |           ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/core/decoder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `image::GenericImageView`
[INFO] [stdout]  --> src/core/decoder.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::GenericImageView;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_used_bytes` is never used
[INFO] [stdout]    --> src/core/encoder.rs:182:4
[INFO] [stdout]     |
[INFO] [stdout] 182 | fn count_used_bytes(img: &RgbImage, bits_per_channel: u8) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.55s
[INFO] running `Command { std: "docker" "inspect" "1c9bf5d5cb394b22fd71c5bbbf58d0a4b5101d718cf0f542a156d0ab4b38a106", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c9bf5d5cb394b22fd71c5bbbf58d0a4b5101d718cf0f542a156d0ab4b38a106", kill_on_drop: false }`
[INFO] [stdout] 1c9bf5d5cb394b22fd71c5bbbf58d0a4b5101d718cf0f542a156d0ab4b38a106
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aed59ad434344a0136475ec015b947fece7af8168c09bec43726600260671099
[INFO] running `Command { std: "docker" "start" "-a" "aed59ad434344a0136475ec015b947fece7af8168c09bec43726600260671099", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `DynamicImage` and `ImageBuffer`
[INFO] [stdout]  --> src/core/encoder.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::{DynamicImage, GenericImageView, ImageBuffer, RgbImage};
[INFO] [stdout]   |             ^^^^^^^^^^^^                    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]  --> src/core/encoder.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{random, Rng};
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/core/encoder.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufWriter`
[INFO] [stdout]   --> src/core/encoder.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::BufWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Compression`, `Encoder`, and `FilterType`
[INFO] [stdout]   --> src/core/encoder.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | use png::{Encoder, Compression, FilterType};
[INFO] [stdout]    |           ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/core/decoder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `image::GenericImageView`
[INFO] [stdout]  --> src/core/decoder.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::GenericImageView;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_used_bytes` is never used
[INFO] [stdout]    --> src/core/encoder.rs:182:4
[INFO] [stdout]     |
[INFO] [stdout] 182 | fn count_used_bytes(img: &RgbImage, bits_per_channel: u8) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling stego_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `DynamicImage` and `ImageBuffer`
[INFO] [stdout]  --> src/core/encoder.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::{DynamicImage, GenericImageView, ImageBuffer, RgbImage};
[INFO] [stdout]   |             ^^^^^^^^^^^^                    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]  --> src/core/encoder.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{random, Rng};
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/core/encoder.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::BufWriter`
[INFO] [stdout]   --> src/core/encoder.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::BufWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Compression`, `Encoder`, and `FilterType`
[INFO] [stdout]   --> src/core/encoder.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | use png::{Encoder, Compression, FilterType};
[INFO] [stdout]    |           ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/core/decoder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `image::GenericImageView`
[INFO] [stdout]  --> src/core/decoder.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use image::GenericImageView;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_used_bytes` is never used
[INFO] [stdout]    --> src/core/encoder.rs:182:4
[INFO] [stdout]     |
[INFO] [stdout] 182 | fn count_used_bytes(img: &RgbImage, bits_per_channel: u8) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "aed59ad434344a0136475ec015b947fece7af8168c09bec43726600260671099", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aed59ad434344a0136475ec015b947fece7af8168c09bec43726600260671099", kill_on_drop: false }`
[INFO] [stdout] aed59ad434344a0136475ec015b947fece7af8168c09bec43726600260671099
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8ea34b58f0e5bb7f3a3be0453611938740351d1636e76cf256173ada67e776c6
[INFO] running `Command { std: "docker" "start" "-a" "8ea34b58f0e5bb7f3a3be0453611938740351d1636e76cf256173ada67e776c6", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `DynamicImage` and `ImageBuffer`
[INFO] [stdout] 
[INFO] [stderr]  --> src/core/encoder.rs:1:13
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 1 | use image::{DynamicImage, GenericImageView, ImageBuffer, RgbImage};
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |             ^^^^^^^^^^^^                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> src/core/encoder.rs:6:20
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rand::{random, Rng};
[INFO] [stderr]   |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]   --> src/core/encoder.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::fs::File;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::BufWriter`
[INFO] [stderr]   --> src/core/encoder.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::io::BufWriter;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Compression`, `Encoder`, and `FilterType`
[INFO] [stderr]   --> src/core/encoder.rs:12:11
[INFO] [stderr]    |
[INFO] [stderr] 12 | use png::{Encoder, Compression, FilterType};
[INFO] [stderr]    |           ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]  --> src/core/decoder.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fs;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `image::GenericImageView`
[INFO] [stderr]  --> src/core/decoder.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use image::GenericImageView;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_used_bytes` is never used
[INFO] [stderr]    --> src/core/encoder.rs:182:4
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn count_used_bytes(img: &RgbImage, bits_per_channel: u8) -> usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `stego_rust` (lib) generated 8 warnings (run `cargo fix --lib -p stego_rust` to apply 6 suggestions)
[INFO] [stderr] warning: `stego_rust` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stego_rust-da46a142bb085f83)
[INFO] [stderr]    Doc-tests stego_rust
[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" "8ea34b58f0e5bb7f3a3be0453611938740351d1636e76cf256173ada67e776c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ea34b58f0e5bb7f3a3be0453611938740351d1636e76cf256173ada67e776c6", kill_on_drop: false }`
[INFO] [stdout] 8ea34b58f0e5bb7f3a3be0453611938740351d1636e76cf256173ada67e776c6
