Fix this error in the new Rust Nightly:
```rust
Compiling script v0.0.1 (file:///home/simon/servo2/components/script)
error[E0599]: no method named `trace` found for type `&fn(&dom::node::Node) -> u16` in the current scope
--> /home/simon/servo2/components/script/dom/treewalker.rs:464:10
|
464 | #[derive(JSTraceable)]
| ^^^^^^^^^^^
|
= note: JSTraceable is a function, perhaps you wish to call it
= help: items from traits can only be used if the trait is implemented and in scope
= note: the following trait defines an item `trace`, perhaps you need to implement it:
candidate #1: `dom::bindings::trace::JSTraceable`
error: aborting due to previous error
error: Could not compile `script`.
```
~I’ve tried to reproduce it in a minimal test case, but `impl<A, B> SomeTrait for fn(A) -> B` did not apply for `fn(&u32) -> u32` even on Rust 1.19.0 stable. So I don’t know what changed.~ This is very likely https://github.com/servo/servo/pull/18327.
Source-Repo: https://github.com/servo/servo
Source-Revision: fd833d9f18cd9196502b9768ab0ac8c1498b2f68
cc #5286
---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [ ] There are tests for these changes OR
- [x] These changes do not require tests because no functionality changed
Source-Repo: https://github.com/servo/servo
Source-Revision: 4426236adfac2de779ff68b47176f7bf36a74e20
This addresses cases where image elements end up making multiple requests, as well as makes the element respond to additional relevant mutations that trigger updating the image data.
---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix#15709 (github issue number if applicable).
- [X] There are tests for these changes
Source-Repo: https://github.com/servo/servo
Source-Revision: f90fc2fa885fd63901c4a14ee70b0169c10efbd0
<!-- Please describe your changes on the following line: -->
Rewrite the ban-type lint in Python.
Question: Should the old ban-type lint written in rust be deleted?
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x ] `./mach build -d` does not report any errors
- [x ] `./mach test-tidy` does not report any errors
- [x ] These changes fix#15591
<!-- Either: -->
- [ x] There are tests for these changes
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Source-Repo: https://github.com/servo/servo
Source-Revision: 261df34ced0bdcb8126994c8653ac101d1172085
The design of initiating network requests from the image cache thread was simple, but it makes it difficult to implement image loading that conforms to the HTML specification. These changes make the implementation of HTMLImageElement responsible for network requests for `<img>` elements, and CSS-based images (background-image, bullets, etc.) are requested by the script thread to ensure that the layout thread does not attempt to retain unsafe pointers to DOM nodes during asynchronous operations.
---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix#7708
- [X] There are tests for these changes
Source-Repo: https://github.com/servo/servo
Source-Revision: 854d720b21dda68034233a25385c4f2564a4a2d5
