[INFO] fetching crate let-engine 0.10.0...
[INFO] checking let-engine-0.10.0 against master#42f4793e5a514858221b07ac379029d90353913e for pr-148952
[INFO] extracting crate let-engine 0.10.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate let-engine 0.10.0
[INFO] finished tweaking crates.io crate let-engine 0.10.0
[INFO] tweaked toml for crates.io crate let-engine 0.10.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate let-engine 0.10.0 on toolchain 42f4793e5a514858221b07ac379029d90353913e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+42f4793e5a514858221b07ac379029d90353913e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate let-engine 0.10.0 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" "+42f4793e5a514858221b07ac379029d90353913e" "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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+42f4793e5a514858221b07ac379029d90353913e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae5158567154906b8bbacff22bb558b0a7bee61fbe3476c5cf49e1a306d18fa3
[INFO] running `Command { std: "docker" "start" "-a" "ae5158567154906b8bbacff22bb558b0a7bee61fbe3476c5cf49e1a306d18fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae5158567154906b8bbacff22bb558b0a7bee61fbe3476c5cf49e1a306d18fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae5158567154906b8bbacff22bb558b0a7bee61fbe3476c5cf49e1a306d18fa3", kill_on_drop: false }`
[INFO] [stdout] ae5158567154906b8bbacff22bb558b0a7bee61fbe3476c5cf49e1a306d18fa3
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+42f4793e5a514858221b07ac379029d90353913e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1c38a792bbefee07b000aff987186f406717526bd408dfc4d7b142c609d86aa
[INFO] running `Command { std: "docker" "start" "-a" "a1c38a792bbefee07b000aff987186f406717526bd408dfc4d7b142c609d86aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
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[INFO] [stderr]     Checking parry2d v0.13.6
[INFO] [stderr]     Checking rapier2d v0.18.0
[INFO] [stderr]     Checking sctk-adwaita v0.5.4
[INFO] [stderr]     Checking let-engine v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `surface` is never read
[INFO] [stdout]   --> src/draw.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct Draw {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 33 |     pub surface: Arc<Surface>,
[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 `surface` is never read
[INFO] [stdout]   --> src/draw.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct Draw {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 33 |     pub surface: Arc<Surface>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:332:9
[INFO] [stdout]     |
[INFO] [stdout] 332 |         self.rgba.map(|mut x| x.add_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 332 |         let _ = self.rgba.map(|mut x| x.add_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:339:9
[INFO] [stdout]     |
[INFO] [stdout] 339 |         self.rgba.map(|mut x| x.sub_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 339 |         let _ = self.rgba.map(|mut x| x.sub_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:346:9
[INFO] [stdout]     |
[INFO] [stdout] 346 |         self.rgba.map(|mut x| x.mul_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 346 |         let _ = self.rgba.map(|mut x| x.mul_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:353:9
[INFO] [stdout]     |
[INFO] [stdout] 353 |         self.rgba.map(|mut x| x.div_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 353 |         let _ = self.rgba.map(|mut x| x.div_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:332:9
[INFO] [stdout]     |
[INFO] [stdout] 332 |         self.rgba.map(|mut x| x.add_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 332 |         let _ = self.rgba.map(|mut x| x.add_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:339:9
[INFO] [stdout]     |
[INFO] [stdout] 339 |         self.rgba.map(|mut x| x.sub_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 339 |         let _ = self.rgba.map(|mut x| x.sub_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:346:9
[INFO] [stdout]     |
[INFO] [stdout] 346 |         self.rgba.map(|mut x| x.mul_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 346 |         let _ = self.rgba.map(|mut x| x.mul_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `array::<impl [T; N]>::map` that must be used
[INFO] [stdout]    --> src/objects/color.rs:353:9
[INFO] [stdout]     |
[INFO] [stdout] 353 |         self.rgba.map(|mut x| x.div_assign(rhs));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 353 |         let _ = self.rgba.map(|mut x| x.div_assign(rhs));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 38s
[INFO] running `Command { std: "docker" "inspect" "a1c38a792bbefee07b000aff987186f406717526bd408dfc4d7b142c609d86aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1c38a792bbefee07b000aff987186f406717526bd408dfc4d7b142c609d86aa", kill_on_drop: false }`
[INFO] [stdout] a1c38a792bbefee07b000aff987186f406717526bd408dfc4d7b142c609d86aa
