Encode cross-crate opaque type origin

2024-10-02 23:16:31 -04:00 · 2024-10-02 23:16:31 -04:00 · e093b82a41
commit e093b82a41
parent 4add5e4211
19 changed files with 53 additions and 43 deletions
--- a/compiler/rustc_infer/src/infer/opaque_types/mod.rs
+++ b/compiler/rustc_infer/src/infer/opaque_types/mod.rs
@ -155,7 +155,10 @@ impl<'tcx> InferCtxt<'tcx> {
                    // however in `fn fut() -> impl Future<Output = i32> { async { 42 } }`, where
                    // it is of no concern, so we only check for TAITs.
                    if self.can_define_opaque_ty(b_def_id)
-                        && self.tcx.is_type_alias_impl_trait(b_def_id)
+                        && matches!(
+                            self.tcx.opaque_ty_origin(b_def_id),
+                            hir::OpaqueTyOrigin::TyAlias { .. }
+                        )
                    {
                        self.dcx().emit_err(OpaqueHiddenTypeDiag {
                            span,