Reset serialized expression to empty on StateError.

pkg/analyzer/lib/src/summary/summarize_const_expr.dart

Index: pkg/analyzer/lib/src/summary/summarize_const_expr.dart
diff --git a/pkg/analyzer/lib/src/summary/summarize_const_expr.dart b/pkg/analyzer/lib/src/summary/summarize_const_expr.dart
index 4c308c5594a0648d905be87d2a45317f675b8916..46b69582fc0f4300576ac0a8a6e059fbe1c1c93d 100644
--- a/pkg/analyzer/lib/src/summary/summarize_const_expr.dart
+++ b/pkg/analyzer/lib/src/summary/summarize_const_expr.dart
@@ -127,6 +127,12 @@ abstract class AbstractConstExprSerializer {
       _serialize(expr);
     } on StateError {
       isValidConst = false;
+      operations.clear();
+      assignmentOperators.clear();
+      ints.clear();
+      doubles.clear();
+      strings.clear();
+      references.clear();
     }
   }