dart2js: type analysis: yield escapes its argument

pkg/compiler/lib/src/inferrer/type_graph_dump.dart

Index: pkg/compiler/lib/src/inferrer/type_graph_dump.dart
diff --git a/pkg/compiler/lib/src/inferrer/type_graph_dump.dart b/pkg/compiler/lib/src/inferrer/type_graph_dump.dart
index 13a7e7b19a8ed9fefab8b6c6b976e9873fd8528d..3f17b3591b4e54c5ee175da9b9a1aa19f7b7d965 100644
--- a/pkg/compiler/lib/src/inferrer/type_graph_dump.dart
+++ b/pkg/compiler/lib/src/inferrer/type_graph_dump.dart
@@ -417,6 +417,11 @@ class _GraphGenerator extends TypeInformationVisitor {
     String text = shorten('${info.node}');
     addNode(info, 'Await\n$text');
   }
+
+  void visitYieldTypeInformation(YieldTypeInformation info) {
+    String text = shorten('${info.node}');
+    addNode(info, 'Yield\n$text');
+  }
 }
 
 /// Convert the given TypeMask to a compact string format.