[INFO] fetching crate img-optimize 0.1.0...
[INFO] checking img-optimize-0.1.0 against try#163937523761cc0def32f1ba9ed63fdf65ad3478 for pr-156749
[INFO] extracting crate img-optimize 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate img-optimize 0.1.0
[INFO] finished tweaking crates.io crate img-optimize 0.1.0
[INFO] tweaked toml for crates.io crate img-optimize 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate img-optimize 0.1.0 on toolchain 163937523761cc0def32f1ba9ed63fdf65ad3478
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate img-optimize 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" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad
[INFO] running `Command { std: "docker" "start" "d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad" "/opt/rustwide/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad" "/opt/rustwide/cargo-home/bin/cargo" "+163937523761cc0def32f1ba9ed63fdf65ad3478" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]     Checking log v0.4.26
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[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:30
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[allow(unused_mut)] let mut support_jpeg_xl = true;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_support_jpeg_xl` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:30
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[allow(unused_mut)] let mut support_jpeg_xl = true;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_support_jpeg_xl` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `support_jpeg_xl` is never read
[INFO] [stdout]   --> src/encoder.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             support_jpeg_xl = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `support_jpeg_xl` is never read
[INFO] [stdout]   --> src/encoder.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             support_jpeg_xl = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:30
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[allow(unused_mut)] let mut support_jpeg_xl = true;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_support_jpeg_xl` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:30
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[allow(unused_mut)] let mut support_jpeg_xl = true;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_support_jpeg_xl` instead
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `support_jpeg_xl` is never read
[INFO] [stdout]   --> src/encoder.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             support_jpeg_xl = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `support_jpeg_xl` is never read
[INFO] [stdout]   --> src/encoder.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             support_jpeg_xl = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `F16` and `F32` are never constructed
[INFO] [stdout]   --> src/structs.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum ImagePixels {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 14 |     F16(Vec<f16>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     F32(Vec<f32>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `allow_jpeg_xl` is never read
[INFO] [stdout]   --> src/structs.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct CompressionConfig {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub allow_jpeg_xl: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encode_png_image_rs` is never used
[INFO] [stdout]    --> src/encoder.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | pub fn encode_png_image_rs(im_info: ImageInfo) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `F16` and `F32` are never constructed
[INFO] [stdout]   --> src/structs.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum ImagePixels {
[INFO] [stdout]    |          ----------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 14 |     F16(Vec<f16>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 15 |     F32(Vec<f32>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `allow_jpeg_xl` is never read
[INFO] [stdout]   --> src/structs.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct CompressionConfig {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub allow_jpeg_xl: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encode_png_image_rs` is never used
[INFO] [stdout]    --> src/encoder.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | pub fn encode_png_image_rs(im_info: ImageInfo) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.00s
[INFO] running `Command { std: "docker" "inspect" "d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad", kill_on_drop: false }`
[INFO] [stdout] d2ab1a3fe47e47671c5b309370f003ecc1e5b9adfbc845796f76a29df659f1ad
