Explicitly compute analysis results for sources to check errors.

pkg/analyzer/test/generated/all_the_rest_test.dart

Index: pkg/analyzer/test/generated/all_the_rest_test.dart
diff --git a/pkg/analyzer/test/generated/all_the_rest_test.dart b/pkg/analyzer/test/generated/all_the_rest_test.dart
index 0b00bbfb9087037698379c6115fcf129a3351148..26c8fbba61e9a5cb32b7002a076fb3bdbe87845a 100644
--- a/pkg/analyzer/test/generated/all_the_rest_test.dart
+++ b/pkg/analyzer/test/generated/all_the_rest_test.dart
@@ -787,6 +787,7 @@ core.int value;''');
   Future<CompilationUnit> _resolveContents(String code) async {
     Source source = addSource(code);
     LibraryElement library = resolve2(source);
+    await computeAnalysisResult(source);
     await assertNoErrors(source);
     verify([source]);
     return analysisContext.resolveCompilationUnit(source, library);