In the new task model, use explicit dependencies on the type provider.

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 ecd1a9e230f5aa64518b262bebdd1723ad3f181b..8a39402f9f039cf8889f62fabfd632dddd220122 100644
--- a/pkg/analyzer/test/src/task/dart_test.dart
+++ b/pkg/analyzer/test/src/task/dart_test.dart
@@ -2367,6 +2367,7 @@ class _AbstractDartTaskTest extends AbstractContextTest {
   void _computeResult(AnalysisTarget target, ResultDescriptor result) {
     oldOutputs = outputs;
     task = analysisDriver.computeResult(target, result);
+    expect(task, isNotNull);
     expect(task.caughtException, isNull);
     outputs = task.outputs;
   }