Resynthesize invalid types as 'dynamic'.

pkg/analyzer/test/src/summary/resynthesize_common.dart

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index 3d8874ce60ffddf97f776c353aef330523d41b43..900b71d67817dff02e5f7720cf7f0b0765edbd13 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -3846,6 +3846,15 @@ class D {}
 ''');
   }
 
+  test_invalid_importPrefix_asTypeArgument() {
+    checkLibrary('''
+import 'dart:async' as ppp;
+class C {
+  List<ppp> v;
+}
+''');
+  }
+
   test_library() {
     checkLibrary('');
   }