diff --git a/pkg/analyzer_plugin/lib/src/utilities/visitors/local_declaration_visitor.dart b/pkg/analyzer_plugin/lib/src/utilities/visitors/local_declaration_visitor.dart
index 8dafe81ab4e9..c3ee9cd313b6 100644
--- a/pkg/analyzer_plugin/lib/src/utilities/visitors/local_declaration_visitor.dart
+++ b/pkg/analyzer_plugin/lib/src/utilities/visitors/local_declaration_visitor.dart
@@ -186,7 +186,9 @@ abstract class LocalDeclarationVisitor extends GeneralizingAstVisitor {
 
   @override
   void visitNode(AstNode node) {
-    node.parent.accept(this);
+    // Support the case of searching partial ASTs by aborting on nodes with no
+    // parents. This is useful for the angular plugin.
+    node.parent?.accept(this);
   }
 
   @override