[INFO] fetching crate dominator 0.5.34...
[INFO] checking dominator-0.5.34 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dominator 0.5.34 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate dominator 0.5.34 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dominator 0.5.34
[INFO] finished tweaking crates.io crate dominator 0.5.34
[INFO] tweaked toml for crates.io crate dominator 0.5.34 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages
[INFO] [stderr]       Adding gloo-events v0.1.2 (latest: v0.2.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gensym v0.1.1
[INFO] [stderr]   Downloaded futures-signals v0.3.33
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b87f37dc8c06d7c1b9072288846ac64f1f309175a27fac8f868ac3e277122ce
[INFO] running `Command { std: "docker" "start" "-a" "8b87f37dc8c06d7c1b9072288846ac64f1f309175a27fac8f868ac3e277122ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b87f37dc8c06d7c1b9072288846ac64f1f309175a27fac8f868ac3e277122ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b87f37dc8c06d7c1b9072288846ac64f1f309175a27fac8f868ac3e277122ce", kill_on_drop: false }`
[INFO] [stdout] 8b87f37dc8c06d7c1b9072288846ac64f1f309175a27fac8f868ac3e277122ce
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee50155da0b0b60e748af0dbf3d4ceac97835ba2ace5a7d5f9f8f8c10b52ffe7
[INFO] running `Command { std: "docker" "start" "-a" "ee50155da0b0b60e748af0dbf3d4ceac97835ba2ace5a7d5f9f8f8c10b52ffe7", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.92
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling uuid v1.8.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.92
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling gensym v0.1.1
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.92
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking js-sys v0.3.69
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking web-sys v0.3.69
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.42
[INFO] [stderr]     Checking futures-signals v0.3.33
[INFO] [stderr]     Checking gloo-events v0.1.2
[INFO] [stderr]     Checking dominator v0.5.34 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `JsCast` is imported redundantly
[INFO] [stdout]  --> src/bindings.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use wasm_bindgen::prelude::*;
[INFO] [stdout]   |     ------------------------ the item `JsCast` is already imported here
[INFO] [stdout] 2 | use wasm_bindgen::{JsCast, intern};
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/callbacks.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IntoIterator` is imported redundantly
[INFO] [stdout]  --> src/operations.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::iter::IntoIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `IntoIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]  --> src/dom.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::AsRef;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `AsRef` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `html` is imported redundantly
[INFO] [stdout]     --> src/dom.rs:1580:17
[INFO] [stdout]      |
[INFO] [stdout] 1580 |       use crate::{html, shadow_root, ShadowRootMode, with_cfg};
[INFO] [stdout]      |                   ^^^^
[INFO] [stdout]      |
[INFO] [stdout]     ::: src/macros.rs:340:1
[INFO] [stdout]      |
[INFO] [stdout] 340  | / macro_rules! html {
[INFO] [stdout] 341  | |     ($($args:tt)+) => {
[INFO] [stdout] 342  | |         $crate::__internal_builder!($crate::__internal::HtmlElement, new_html, $($args)+)
[INFO] [stdout] 343  | |     };
[INFO] [stdout] 344  | | }
[INFO] [stdout]      | |_- the item `html` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `shadow_root` is imported redundantly
[INFO] [stdout]     --> src/dom.rs:1580:23
[INFO] [stdout]      |
[INFO] [stdout] 1580 |       use crate::{html, shadow_root, ShadowRootMode, with_cfg};
[INFO] [stdout]      |                         ^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]     ::: src/macros.rs:305:1
[INFO] [stdout]      |
[INFO] [stdout] 305  | / macro_rules! shadow_root {
[INFO] [stdout] 306  | |     ($this:ident, $mode:expr => { $($methods:tt)* }) => {{
[INFO] [stdout] 307  | |         let shadow = $crate::DomBuilder::__internal_shadow_root(&$this, $mode);
[INFO] [stdout] 308  | |         let shadow = $crate::apply_methods!(shadow, { $($methods)* });
[INFO] [stdout] 309  | |         $crate::DomBuilder::__internal_transfer_callbacks($this, shadow)
[INFO] [stdout] 310  | |     }};
[INFO] [stdout] 311  | | }
[INFO] [stdout]      | |_- the item `shadow_root` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `with_cfg` is imported redundantly
[INFO] [stdout]     --> src/dom.rs:1580:52
[INFO] [stdout]      |
[INFO] [stdout] 1580 |       use crate::{html, shadow_root, ShadowRootMode, with_cfg};
[INFO] [stdout]      |                                                      ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]     ::: src/macros.rs:270:1
[INFO] [stdout]      |
[INFO] [stdout] 270  | / macro_rules! with_cfg {
[INFO] [stdout] 271  | |     ($this:ident, $cfg:meta, { $($methods:tt)* }) => {{
[INFO] [stdout] 272  | |         #[cfg($cfg)]
[INFO] [stdout] 273  | |         let this = $crate::apply_methods!($this, { $($methods)* });
[INFO] [stdout] ...    |
[INFO] [stdout] 279  | |     }};
[INFO] [stdout] 280  | | }
[INFO] [stdout]      | |_- the item `with_cfg` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `JsCast` is imported redundantly
[INFO] [stdout]  --> src/bindings.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use wasm_bindgen::prelude::*;
[INFO] [stdout]   |     ------------------------ the item `JsCast` is already imported here
[INFO] [stdout] 2 | use wasm_bindgen::{JsCast, intern};
[INFO] [stdout]   |                    ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/callbacks.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IntoIterator` is imported redundantly
[INFO] [stdout]  --> src/operations.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::iter::IntoIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `IntoIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]  --> src/dom.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::AsRef;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `AsRef` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/animation.rs:582:28
[INFO] [stdout]     |
[INFO] [stdout] 582 | pub struct OnTimestampDiff(DiscardOnDrop<CancelableFutureHandle>);
[INFO] [stdout]     |            --------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 582 | pub struct OnTimestampDiff(());
[INFO] [stdout]     |                            ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/animation.rs:582:28
[INFO] [stdout]     |
[INFO] [stdout] 582 | pub struct OnTimestampDiff(DiscardOnDrop<CancelableFutureHandle>);
[INFO] [stdout]     |            --------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 582 | pub struct OnTimestampDiff(());
[INFO] [stdout]     |                            ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.86s
[INFO] running `Command { std: "docker" "inspect" "ee50155da0b0b60e748af0dbf3d4ceac97835ba2ace5a7d5f9f8f8c10b52ffe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee50155da0b0b60e748af0dbf3d4ceac97835ba2ace5a7d5f9f8f8c10b52ffe7", kill_on_drop: false }`
[INFO] [stdout] ee50155da0b0b60e748af0dbf3d4ceac97835ba2ace5a7d5f9f8f8c10b52ffe7