Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 8 insertions, 6 deletions

diff --git a/compiler/rustc_infer/src/infer/lattice.rs b/compiler/rustc_infer/src/infer/lattice.rs
index eba65361a..4dbb4b4d7 100644
--- a/compiler/rustc_infer/src/infer/lattice.rs
+++ b/compiler/rustc_infer/src/infer/lattice.rs
@@ -78,7 +78,7 @@ where
         //
         // Example: if the LHS is a type variable, and RHS is
         // `Box<i32>`, then we current compare `v` to the RHS first,
-        // which will instantiate `v` with `Box<i32>`.  Then when `v`
+        // which will instantiate `v` with `Box<i32>`. Then when `v`
         // is compared to the LHS, we instantiate LHS with `Box<i32>`.
         // But if we did in reverse order, we would create a `v <:
         // LHS` (or vice versa) constraint and then instantiate
@@ -105,11 +105,13 @@ where
             Ok(v)
         }
 
-        (&ty::Opaque(a_def_id, _), &ty::Opaque(b_def_id, _)) if a_def_id == b_def_id => {
-            infcx.super_combine_tys(this, a, b)
-        }
-        (&ty::Opaque(did, ..), _) | (_, &ty::Opaque(did, ..))
-            if this.define_opaque_types() && did.is_local() =>
+        (
+            &ty::Alias(ty::Opaque, ty::AliasTy { def_id: a_def_id, .. }),
+            &ty::Alias(ty::Opaque, ty::AliasTy { def_id: b_def_id, .. }),
+        ) if a_def_id == b_def_id => infcx.super_combine_tys(this, a, b),
+        (&ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }), _)
+        | (_, &ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }))
+            if this.define_opaque_types() && def_id.is_local() =>
         {
             this.add_obligations(
                 infcx