[Deserialization] Fix deserialization of explicit existential types.

hborla · hborla · commit efeb709f6586 · 2022-01-13T19:30:44.000-08:00
diff --git a/lib/Serialization/Deserialization.cpp b/lib/Serialization/Deserialization.cpp
@@ -6117,6 +6117,7 @@ Expected<Type> TypeDeserializer::getTypeCheckedImpl() {
   CASE(SequenceArchetype)
   CASE(GenericTypeParam)
   CASE(ProtocolComposition)
+  CASE(Existential)
   CASE(DependentMember)
   CASE(BoundGeneric)
   CASE(SILBlockStorage)
