[INFO] fetching crate prime_bench 0.1.2...
[INFO] checking prime_bench-0.1.2 against master#4457658f68b5c165cd76d24b8147a8f77b9f660e for pr-107620
[INFO] extracting crate prime_bench 0.1.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate prime_bench 0.1.2 on toolchain 4457658f68b5c165cd76d24b8147a8f77b9f660e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4457658f68b5c165cd76d24b8147a8f77b9f660e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prime_bench 0.1.2
[INFO] finished tweaking crates.io crate prime_bench 0.1.2
[INFO] tweaked toml for crates.io crate prime_bench 0.1.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate prime_bench 0.1.2 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" "+4457658f68b5c165cd76d24b8147a8f77b9f660e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+4457658f68b5c165cd76d24b8147a8f77b9f660e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `iced::widget::button`
[INFO] [stdout]    --> src/main.rs:235:5
[INFO] [stdout]     |
[INFO] [stdout] 235 | use iced::widget::button;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iced::widget::button`
[INFO] [stdout]    --> src/main.rs:235:5
[INFO] [stdout]     |
[INFO] [stdout] 235 | use iced::widget::button;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iced::widget::button::StyleSheet`
[INFO] [stdout]    --> src/main.rs:237:5
[INFO] [stdout]     |
[INFO] [stdout] 237 | use iced::widget::button::StyleSheet;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iced::widget::button::StyleSheet`
[INFO] [stdout]    --> src/main.rs:237:5
[INFO] [stdout]     |
[INFO] [stdout] 237 | use iced::widget::button::StyleSheet;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iced_native::renderer::Style`
[INFO] [stdout]    --> src/main.rs:240:5
[INFO] [stdout]     |
[INFO] [stdout] 240 | use iced_native::renderer::Style;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iced_native::renderer::Style`
[INFO] [stdout]    --> src/main.rs:240:5
[INFO] [stdout]     |
[INFO] [stdout] 240 | use iced_native::renderer::Style;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Sandbox`
[INFO] [stdout]   --> src/main.rs:85:32
[INFO] [stdout]    |
[INFO] [stdout] 85 | use iced::{Alignment, Element, Sandbox, Settings};
[INFO] [stdout]    |                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Sandbox`
[INFO] [stdout]   --> src/main.rs:85:32
[INFO] [stdout]    |
[INFO] [stdout] 85 | use iced::{Alignment, Element, Sandbox, Settings};
[INFO] [stdout]    |                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `compute_button` is never read
[INFO] [stdout]   --> src/main.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct GUI {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 93 |     compute_button: Message,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `compute_button` is never read
[INFO] [stdout]   --> src/main.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct GUI {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 93 |     compute_button: Message,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]    --> src/main.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | enum Message {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 115 |     None,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]    --> src/main.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | enum Message {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 115 |     None,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.49s
[INFO] running `Command { std: "docker" "inspect" "76a314b73cb51123381260de9bae571af10d8583e4d0037a0c3d8f0f73056774", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76a314b73cb51123381260de9bae571af10d8583e4d0037a0c3d8f0f73056774", kill_on_drop: false }`
[INFO] [stdout] 76a314b73cb51123381260de9bae571af10d8583e4d0037a0c3d8f0f73056774