Build full LIBRARY_ELEMENT for every library source in the import/export closure, when resolve a un…

pkg/analyzer/test/src/task/dart_test.dart

Index: pkg/analyzer/test/src/task/dart_test.dart
diff --git a/pkg/analyzer/test/src/task/dart_test.dart b/pkg/analyzer/test/src/task/dart_test.dart
index fb965da2cf735d7fdc03b234205853a0dae245f7..f89b77194b0dbd1f0bda72b66199eaa8cc5700d8 100644
--- a/pkg/analyzer/test/src/task/dart_test.dart
+++ b/pkg/analyzer/test/src/task/dart_test.dart
@@ -2505,6 +2505,20 @@ class ResolveVariableReferencesTaskTest extends _AbstractDartTaskTest {
     expect(variable.isPotentiallyMutatedInScope, mutatedInScope);
   }
 
+  test_perform_buildClosureLibraryElements() {
+    Source source = newSource('/test.dart', '''
+main() {
+}
+''');
+    LibrarySpecificUnit target = new LibrarySpecificUnit(source, source);
+    _computeResult(target, RESOLVED_UNIT5);
+    expect(task, new isInstanceOf<ResolveVariableReferencesTask>());
+    // dart:core LIBRARY_ELEMENT is built
+    expect(analysisCache.getState(
+        context.sourceFactory.resolveUri(null, 'dart:core'),
+        LIBRARY_ELEMENT), CacheState.VALID);
+  }
+
   test_perform_local() {
     Source source = newSource('/test.dart', '''
 main() {