[INFO] fetching crate img-optimize 0.1.0...
[INFO] testing img-optimize-0.1.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate img-optimize 0.1.0 into /workspace/builds/worker-0-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-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate img-optimize 0.1.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] [stdout] 980f1338603cc61f84590777192a73959d60d34006dd583589f41e467d90a6a5
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[INFO] [stdout] a57d3bf87093a2f0be5b8ea63eb435d3c31e9c7eb65789423acddc454292c5ce
[INFO] running `Command { std: "docker" "start" "-a" "a57d3bf87093a2f0be5b8ea63eb435d3c31e9c7eb65789423acddc454292c5ce", kill_on_drop: false }`
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[INFO] [stderr]    Compiling img-optimize v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:34
[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: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:34
[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: 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 44.45s
[INFO] running `Command { std: "docker" "inspect" "a57d3bf87093a2f0be5b8ea63eb435d3c31e9c7eb65789423acddc454292c5ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a57d3bf87093a2f0be5b8ea63eb435d3c31e9c7eb65789423acddc454292c5ce", kill_on_drop: false }`
[INFO] [stdout] a57d3bf87093a2f0be5b8ea63eb435d3c31e9c7eb65789423acddc454292c5ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d03dd73e70c53b66fd5f322ac68cda396692ec38a26ea667e59161ffbce3fae
[INFO] running `Command { std: "docker" "start" "-a" "3d03dd73e70c53b66fd5f322ac68cda396692ec38a26ea667e59161ffbce3fae", kill_on_drop: false }`
[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:34
[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] [stderr]    Compiling img-optimize v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:34
[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: 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: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stdout]  --> src/encoder.rs:8:34
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "3d03dd73e70c53b66fd5f322ac68cda396692ec38a26ea667e59161ffbce3fae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d03dd73e70c53b66fd5f322ac68cda396692ec38a26ea667e59161ffbce3fae", kill_on_drop: false }`
[INFO] [stdout] 3d03dd73e70c53b66fd5f322ac68cda396692ec38a26ea667e59161ffbce3fae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] dc1f0c6cd69f2c7319e428142a43c44498b17521943ed349f9fc16947c73619e
[INFO] running `Command { std: "docker" "start" "-a" "dc1f0c6cd69f2c7319e428142a43c44498b17521943ed349f9fc16947c73619e", kill_on_drop: false }`
[INFO] [stderr] warning: variable `support_jpeg_xl` is assigned to, but never used
[INFO] [stderr]  --> src/encoder.rs:8:34
[INFO] [stderr]   |
[INFO] [stderr] 8 |     #[allow(unused_mut)] let mut support_jpeg_xl = true;
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider using `_support_jpeg_xl` instead
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `support_jpeg_xl` is never read
[INFO] [stderr]   --> src/encoder.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             support_jpeg_xl = false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `img-optimize` (lib) generated 2 warnings
[INFO] [stderr] warning: `img-optimize` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr] warning: variants `F16` and `F32` are never constructed
[INFO] [stderr]   --> src/structs.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub enum ImagePixels {
[INFO] [stderr]    |          ----------- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 14 |     F16(Vec<f16>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 15 |     F32(Vec<f32>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `allow_jpeg_xl` is never read
[INFO] [stderr]   --> src/structs.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct CompressionConfig {
[INFO] [stderr]    |            ----------------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 22 |     pub allow_jpeg_xl: bool,
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `encode_png_image_rs` is never used
[INFO] [stderr]    --> src/encoder.rs:133:8
[INFO] [stderr]     |
[INFO] [stderr] 133 | pub fn encode_png_image_rs(im_info: ImageInfo) -> Vec<u8> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `img-optimize` (bin "img-optimize" test) generated 5 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/img_optimize-b17f1a45870087c8)
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/img_optimize-adc14b9b6703772d)
[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] [stderr]    Doc-tests img_optimize
[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" "dc1f0c6cd69f2c7319e428142a43c44498b17521943ed349f9fc16947c73619e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc1f0c6cd69f2c7319e428142a43c44498b17521943ed349f9fc16947c73619e", kill_on_drop: false }`
[INFO] [stdout] dc1f0c6cd69f2c7319e428142a43c44498b17521943ed349f9fc16947c73619e