When a name is both exported and defined locally, the name is defined.

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

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 4378 matching lines @@
   test_method_type_parameter_in_generic_class() {
     prepareAnalysisContext(createOptions());
     checkLibrary('class C<T, U> { V f<V, W>(T t, U u, W w) => null; }');
   }
 
   test_method_type_parameter_with_function_typed_parameter() {
     prepareAnalysisContext(createOptions());
     checkLibrary('class C { void f<T, U>(T x(U u)) {} }');
   }
 
+  test_nameConflict_exportedAndLocal() {
+    namesThatCannotBeResolved.add('V');
+    addLibrarySource('/a.dart', 'class C {}');
+    addLibrarySource(
+        '/c.dart',
+        '''
+export 'a.dart';
+class C {}
+''');
+    checkLibrary('''
+import 'c.dart';
+C v = null;
+''');
+  }
+
+  test_nameConflict_exportedAndParted() {
+    namesThatCannotBeResolved.add('V');
+    addLibrarySource('/a.dart', 'class C {}');
+    addLibrarySource(
+        '/b.dart',
+        '''
+part of lib;
+class C {}
+''');
+    addLibrarySource(
+        '/c.dart',
+        '''
+library lib;
+export 'a.dart';
+part 'b.dart';
+''');
+    checkLibrary('''
+import 'c.dart';
+C v = null;
+''');
+  }
+
   test_nested_generic_functions_in_generic_class_with_function_typed_params() {
     checkLibrary('''
 class C<T, U> {
   void g<V, W>() {
     void h<X, Y>(void p(T t, U u, V v, W w, X x, Y y)) {
     }
   }
 }
 ''');
   }
@@ skipping 795 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }