Track bound types like bound regions

2023-01-17 03:27:48 +00:00
parent a322848c6b
commit 0e98a162c8
13 changed files with 52 additions and 38 deletions
--- a/compiler/rustc_middle/src/ty/fold.rs
+++ b/compiler/rustc_middle/src/ty/fold.rs
@@ -610,7 +610,9 @@ impl<'tcx> TyCtxt<'tcx> {
                let index = entry.index();
                let var = ty::BoundVar::from_usize(index);
                let kind = entry
-                    .or_insert_with(|| ty::BoundVariableKind::Ty(ty::BoundTyKind::Anon))
+                    .or_insert_with(|| {
+                        ty::BoundVariableKind::Ty(ty::BoundTyKind::Anon(index as u32))
+                    })
                    .expect_ty();
                self.tcx.mk_ty(ty::Bound(ty::INNERMOST, BoundTy { var, kind }))
            }