dart2js: type analysis: yield escapes its argument

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

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library compiler.src.inferrer.node_tracer;
 
 import '../common/names.dart' show Identifiers;
 import '../compiler.dart' show Compiler;
 import '../elements/elements.dart';
 import '../types/types.dart' show ContainerTypeMask, MapTypeMask;
@@ skipping 139 matching lines @@
     if (debug.VERBOSE) {
       print('Bailing out on $tracedType because: $reason');
     }
     continueAnalyzing = false;
   }
 
   void visitAwaitTypeInformation(AwaitTypeInformation info) {
     bailout("Passed through await");
   }
 
+  void visitYieldTypeInformation(YieldTypeInformation info) {
+    // TODO(29344): The enclosing sync*/async/async* method could have a
+    // tracable TypeInformation for the Iterable / Future / Stream with an
+    // element TypeInformation. Then YieldTypeInformation could connect the
+    // source type information to the tracable element.
+    bailout("Passed through yield");
+  }
+
   void visitNarrowTypeInformation(NarrowTypeInformation info) {
     addNewEscapeInformation(info);
   }
 
   void visitPhiElementTypeInformation(PhiElementTypeInformation info) {
     addNewEscapeInformation(info);
   }
 
   void visitElementInContainerTypeInformation(
       ElementInContainerTypeInformation info) {
@@ skipping 290 matching lines @@
     }
     if (isParameterOfListAddingMethod(element) ||
         isParameterOfMapAddingMethod(element)) {
       // These elements are being handled in
       // [visitDynamicCallSiteTypeInformation].
       return;
     }
     addNewEscapeInformation(info);
   }
 }