1f0f0adbf4
resolve: Give derive helpers highest priority during resolution
So they just shadow everything else and don't create ambiguity errors.
This matches the old pre-#64694 behavior most closely.
---
The change doesn't apply to this "compatibility" case
```rust
#[trait_helper] // The helper attribute is used before it introduced.
// Sadly, compiles on stable, supported via hacks.
// I plan to make a compatibility warning for this.
#[derive(Trait)]
struct S;
```
, such attributes still create ambiguities, but #64694 didn't change anything for this case.
Fixes https://github.com/rust-lang/rust/issues/66508
Fixes https://github.com/rust-lang/rust/issues/66525
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| assembly | ||
| auxiliary | ||
| codegen | ||
| codegen-units | ||
| compile-fail | ||
| debuginfo | ||
| incremental | ||
| mir-opt | ||
| pretty | ||
| run-fail | ||
| run-make | ||
| run-make-fulldeps | ||
| run-pass-valgrind | ||
| rustdoc | ||
| rustdoc-js | ||
| rustdoc-js-std | ||
| rustdoc-ui | ||
| rustfix | ||
| ui | ||
| ui-fulldeps | ||
| COMPILER_TESTS.md | ||