Index: lib/StaticAnalyzer/Core/SimpleSValBuilder.cpp
===================================================================
--- lib/StaticAnalyzer/Core/SimpleSValBuilder.cpp
+++ lib/StaticAnalyzer/Core/SimpleSValBuilder.cpp
@@ -960,8 +960,9 @@
     }
 
     if (Optional<NonLoc> indexV = index.getAs<NonLoc>()) {
-      return loc::MemRegionVal(MemMgr.getElementRegion(elementType, *indexV,
-                                                       superR, getContext()));
+      if (!elementType.isNull())
+        return loc::MemRegionVal(MemMgr.getElementRegion(elementType, *indexV,
+                                                         superR, getContext()));
     }
   }
   return UnknownVal();