1 files changed, 1 insertions, 1 deletions

diff --git a/crates/ra_hir/src/ty/lower.rs b/crates/ra_hir/src/ty/lower.rs
index 26c213a41..300616a53 100644
--- a/crates/ra_hir/src/ty/lower.rs
+++ b/crates/ra_hir/src/ty/lower.rs
@@ -460,7 +460,7 @@ fn type_for_type_alias(db: &impl HirDatabase, t: TypeAlias) -> Ty {
     let resolver = t.resolver(db);
     let type_ref = t.type_ref(db);
     let substs = Substs::identity(&generics);
-    let inner = Ty::from_hir(db, &resolver, &type_ref);
+    let inner = Ty::from_hir(db, &resolver, &type_ref.unwrap_or(TypeRef::Error));
     inner.subst(&substs)
 }