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Verbose, confusing error message, with a lot of extension traits in scope with the same method name

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A-diagnostics A-trait-system D-confusing D-verbose T-compiler
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Description

Code
`cargo build` with

https://github.com/Philipp-M/xilem_web-error-message-repro
Current output

With current rustc:

error[E0599]: the method `fill` exists for struct `Line<_, _, ()>`, but its trait bounds were not satisfied
 --> src/main.rs:5:23
  |
5 |         svg::line(()).fill(Color::LIGHT_GRAY)
  |                       ^^^^ method cannot be called on `Line<_, _, ()>` due to unsatisfied trait bounds
  |
  = note: the following trait bounds were not satisfied:
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGraphicsElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: SvgGraphicsElement<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
          `<&xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
          `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGraphicsElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGeometryElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: SvgGraphicsElement<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
          `<&mut xilem_web::elements::svg::Line<_, _, ()> as View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>>::Element = Pod<_, _>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
          `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
          which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`

warning: unused import: `interfaces`
 --> src/main.rs:1:47
  |
1 | use xilem_web::{document_body, elements::svg, interfaces::*, svg::peniko::Color, App};
  |                                               ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

For more information about this error, try `rustc --explain E0599`.
warning: `xilem_web-error-message-repro` (bin "xilem_web-error-message-repro") generated 1 warning
error: could not compile `xilem_web-error-message-repro` (bin "xilem_web-error-message-repro") due to 1 previous error; 1 warning emitted

With RUSTFLAGS="-Znext-solver" this is a little bit better, but still confusing:

error[E0599]: the method `fill` exists for struct `Line<_, _, ()>`, but its trait bounds were not satisfied
   --> src/main.rs:5:23
    |
5   |           svg::line(()).fill(Color::LIGHT_GRAY)
    |                         ^^^^ method cannot be called on `Line<_, _, ()>` due to unsatisfied trait bounds
    |
   ::: /home/philm/.cargo/registry/src/index.crates.io-6f17d22bba15001f/web-sys-0.3.69/src/features/gen_SvgLineElement.rs:5:1
    |
5   |   #[wasm_bindgen]
    |   --------------- doesn't satisfy 8 bounds
    |
   ::: /home/philm/.cargo/git/checkouts/xilem-031d790027f85a11/101fa9b/xilem_web/src/elements.rs:649:5
    |
649 | /     define_elements!(
650 | |         SVG_NS,
651 | |         (Svg, svg, SvgsvgElement),
652 | |         (A, a, SvgaElement),
...   |
815 | |         (SvgView, view, SvgViewElement),
816 | |     );
    | |_____- doesn't satisfy 8 bounds
    |
    = note: the following trait bounds were not satisfied:
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgCircleElement::SvgCircleElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgEllipseElement::SvgEllipseElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvggElement::SvggElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgPathElement::SvgPathElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgPolygonElement::SvgPolygonElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgPolylineElement::SvgPolylineElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgRectElement::SvgRectElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
            `web_sys::features::gen_SvgLineElement::SvgLineElement: AsRef<web_sys::features::gen_SvgTextContentElement::SvgTextContentElement>`
            which is required by `xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
            `&xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgCircleElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgEllipseElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvggElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPathElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolygonElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgPolylineElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgRectElement<_, _>`
            `&mut xilem_web::elements::svg::Line<_, _, ()>: View<_, _, ViewCtx, Box<(dyn xilem_web::Message + 'static)>>`
            which is required by `&mut xilem_web::elements::svg::Line<_, _, ()>: xilem_web::interfaces::SvgTextContentElement<_, _>`

warning: unused import: `interfaces`
 --> src/main.rs:1:47
  |
1 | use xilem_web::{document_body, elements::svg, interfaces::*, svg::peniko::Color, App};
  |                                               ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

For more information about this error, try `rustc --explain E0599`.
warning: `xilem_web-error-message-repro` (bin "xilem_web-error-message-repro") generated 1 warning
error: could not compile `xilem_web-error-message-repro` (bin "xilem_web-error-message-repro") due to 1 previous error; 1 warning emitted
Desired output

I'm not sure to be honest, but this error message seems to be worse than not having it at all.

Rationale and extra context

In xilem_web DOM interfaces are emulated via extension traits heavily relying on super trait-bounds with associated type bounds, something like this:

pub trait SvgPathElement<State, Action = ()>:
    SvgGeometryElement<State, Action, DomNode: AsRef<web_sys::SvgPathElement>>
{
    fn fill(self, brush: impl Into<peniko::Brush>) -> crate::svg::Fill<Self, State, Action> {
        crate::svg::fill(self, brush)
    }
}

The provided repro-example is a special cased fill method (i.e. exists on multiple off those traits (8 if I counted correctly)).

This error message is only raised, when having all those traits in scope (i.e. use xilem_web::interfaces::*).
It's practically not possible that these bounds can be fulfilled with the line element, as DomNode: AsRef<_> can not be fulfilled with the associated type DomNode = web_sys::SvgLineElement for any of those with the fill method.

Originally this error message was raised (due to a now fixed bug) in https://github.com/linebender/xilem/issues/446 and posted on zulip

Other cases

No response

Rust Version
rustc 1.82.0-nightly (8e86c9567 2024-08-01)
binary: rustc
commit-hash: 8e86c9567154dc5a9ada15ab196d23eae2bd7d89
commit-date: 2024-08-01
host: x86_64-unknown-linux-gnu
release: 1.82.0-nightly
LLVM version: 19.1.0
Anything else?

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by running cargo build in the linked xilem_web-error-message-repro repository and inspect the reported fill call in src/main.rs. Trace the compiler diagnostic code that produces the trait-bound and method-resolution output. Done means the same reproduction reports the error more concisely and clearly without the repeated extension traits.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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