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4c83bd03a9
Don't wf-check non-local RPITs We were using `ty::is_impl_trait_defn(..).is_none()` to check if we need to add WF obligations for an opaque type. This is *supposed* to be checking if the type is a TAIT, since RPITs' wfness is implied by wf checking its parent item, but since `is_impl_trait_defn` returns `None` for non-local RPIT and async futures, we unnecessarily consider wf predicates for an RPIT if it is coming from a foreign crate. Fixes #107036 r? `@oli-obk` but feel free to reassign |
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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.