[INFO] cloning repository https://github.com/ponchofiesta/duplicate-image-finder-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ponchofiesta/duplicate-image-finder-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fponchofiesta%2Fduplicate-image-finder-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fponchofiesta%2Fduplicate-image-finder-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e04c60f2673cd0e5c92f315d6201f219c6173b86
[INFO] checking ponchofiesta/duplicate-image-finder-rs/e04c60f2673cd0e5c92f315d6201f219c6173b86 against master#4cf5f9580233c36f6bc8db76e282ba8a1c1ea491 for pr-154585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fponchofiesta%2Fduplicate-image-finder-rs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ponchofiesta/duplicate-image-finder-rs
[INFO] finished tweaking git repo https://github.com/ponchofiesta/duplicate-image-finder-rs
[INFO] tweaked toml for git repo https://github.com/ponchofiesta/duplicate-image-finder-rs written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ponchofiesta/duplicate-image-finder-rs on toolchain 4cf5f9580233c36f6bc8db76e282ba8a1c1ea491
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4cf5f9580233c36f6bc8db76e282ba8a1c1ea491" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ponchofiesta/duplicate-image-finder-rs 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" "+4cf5f9580233c36f6bc8db76e282ba8a1c1ea491" "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
[INFO] [stderr]  Downloading crates ...
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[INFO] [stderr]   Downloaded wgpu-core v0.19.0
[INFO] [stderr]   Downloaded wgpu-hal v0.19.1
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+4cf5f9580233c36f6bc8db76e282ba8a1c1ea491" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ead2d29502b9c69b886645921b1e7a535a8df38ef411ceaf4982bcad0d0aac8d
[INFO] running `Command { std: "docker" "start" "-a" "ead2d29502b9c69b886645921b1e7a535a8df38ef411ceaf4982bcad0d0aac8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ead2d29502b9c69b886645921b1e7a535a8df38ef411ceaf4982bcad0d0aac8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ead2d29502b9c69b886645921b1e7a535a8df38ef411ceaf4982bcad0d0aac8d", kill_on_drop: false }`
[INFO] [stdout] ead2d29502b9c69b886645921b1e7a535a8df38ef411ceaf4982bcad0d0aac8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+4cf5f9580233c36f6bc8db76e282ba8a1c1ea491" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8bc1e5f68286d813f0555201d2861c9ffea6b3a57cd9146b824594b50a03307
[INFO] running `Command { std: "docker" "start" "-a" "b8bc1e5f68286d813f0555201d2861c9ffea6b3a57cd9146b824594b50a03307", kill_on_drop: false }`
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[INFO] [stderr]     Checking imageproc v0.23.0
[INFO] [stderr]     Checking duplicate-image-finder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Sub`
[INFO] [stdout]  --> src/finder.rs:2:56
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{collections::HashSet, ops::{Deref, DerefMut, Sub}, path::{Path, PathBuf}};
[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: `std::ops`
[INFO] [stdout]  --> src/image.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Sub`
[INFO] [stdout]   --> src/image.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::ops::Sub;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Image`
[INFO] [stdout]  --> src/widgets.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     egui::{Image, ProgressBar, Ui}
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Sub`
[INFO] [stdout]  --> src/finder.rs:2:56
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{collections::HashSet, ops::{Deref, DerefMut, Sub}, path::{Path, PathBuf}};
[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: `std::ops`
[INFO] [stdout]  --> src/image.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Sub`
[INFO] [stdout]   --> src/image.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::ops::Sub;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Image`
[INFO] [stdout]  --> src/widgets.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     egui::{Image, ProgressBar, Ui}
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]   --> src/finder.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |             groups.push(ImageInfoGroup::from_vec(&[pair.a, pair.b]));
[INFO] [stdout]    |                                                   ---------------- temporary value created here
[INFO] [stdout] ...
[INFO] [stdout] 59 |     groups
[INFO] [stdout]    |     ^^^^^^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/image.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn next(&mut self) -> Option<Self::Item> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 36 |         self.next()
[INFO] [stdout]    |         ----------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `histograms`
[INFO] [stdout]    --> src/image.rs:182:9
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let histograms = histogram(&buffer);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_histograms`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `duplicate-image-finder` (bin "duplicate-image-finder") due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]   --> src/finder.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |             groups.push(ImageInfoGroup::from_vec(&[pair.a, pair.b]));
[INFO] [stdout]    |                                                   ---------------- temporary value created here
[INFO] [stdout] ...
[INFO] [stdout] 59 |     groups
[INFO] [stdout]    |     ^^^^^^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/image.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn next(&mut self) -> Option<Self::Item> {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 36 |         self.next()
[INFO] [stdout]    |         ----------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `histograms`
[INFO] [stdout]    --> src/image.rs:182:9
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let histograms = histogram(&buffer);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_histograms`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `duplicate-image-finder` (bin "duplicate-image-finder" test) due to 1 previous error; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b8bc1e5f68286d813f0555201d2861c9ffea6b3a57cd9146b824594b50a03307", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8bc1e5f68286d813f0555201d2861c9ffea6b3a57cd9146b824594b50a03307", kill_on_drop: false }`
[INFO] [stdout] b8bc1e5f68286d813f0555201d2861c9ffea6b3a57cd9146b824594b50a03307
