improve parser recovery for import directives

pkg/analysis_server/test/services/completion/keyword_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/keyword_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/keyword_contributor_test.dart b/pkg/analysis_server/test/services/completion/keyword_contributor_test.dart
index 547f1c90dfbeb53ea1dd5a7692bb7d00fa7b3a58..c9b6f7c83868a918da758b159369ae5db61b6e37 100644
--- a/pkg/analysis_server/test/services/completion/keyword_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/keyword_contributor_test.dart
@@ -434,6 +434,12 @@ class A {
     assertSuggestKeywords([Keyword.DEFERRED], DART_RELEVANCE_HIGH);
   }
 
+  test_import_deferred2() {
+    addTestSource('import "foo" d^ as foo;');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords([Keyword.DEFERRED], DART_RELEVANCE_HIGH);
+  }
+
   test_import_deferred_not() {
     addTestSource('import "foo" as foo ^;');
     expect(computeFast(), isTrue);