Try incremental analysis before limiting invalidation.

pkg/analyzer/lib/src/context/context.dart

Index: pkg/analyzer/lib/src/context/context.dart
diff --git a/pkg/analyzer/lib/src/context/context.dart b/pkg/analyzer/lib/src/context/context.dart
index fc44cf809e10d22a099cdf2a50cd9add80840351..543fbbc16c50135f79c00c2057c73f31d51a6f21 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -1779,9 +1779,6 @@ class AnalysisContextImpl implements InternalAnalysisContext {
    * TODO(scheglov) A hackish, limited incremental resolution implementation.
    */
   bool _tryPoorMansIncrementalResolution(Source unitSource, String newCode) {
-    if (AnalysisEngine.instance.limitInvalidationInTaskModel) {
-      return false;
-    }
     return PerformanceStatistics.incrementalAnalysis.makeCurrentWhile(() {
       incrementalResolutionValidation_lastUnitSource = null;
       incrementalResolutionValidation_lastLibrarySource = null;