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c571b2a964
Improve spans for RPITIT object-safety errors
No reason why we can't point at the `impl Trait` that causes the object-safety violation.
Also [drive-by: Add is_async fn to hir::IsAsync](
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Cargo.toml | ||
README.md |
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.