Re-apply: Inside a generative constructor, "this" is created at the very end. So we have to use the…

sdk/lib/_internal/compiler/implementation/closure.dart

 // Copyright (c) 2012, 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 closureToClassMapper;
 
 import "elements/elements.dart";
 import "dart2jslib.dart";
 import "dart_types.dart";
 import "scanner/scannerlib.dart" show Token;
@@ skipping 429 matching lines @@
         useLocal(type.element);
       } else if (type is InterfaceType) {
         InterfaceType ifcType = type;
         for (DartType argument in ifcType.typeArguments) {
           analyzeTypeVariables(argument);
         }
       }
     }
     if (outermostElement.isMember() &&
         compiler.world.needsRti(outermostElement.getEnclosingClass())) {
-      if (outermostElement.isInstanceMember()
-          || outermostElement.isGenerativeConstructor()) {
+      if (outermostElement.isConstructor()) {
+        analyzeTypeVariables(type);
+      } else if (outermostElement.isInstanceMember()) {
         if (hasTypeVariable(type)) useLocal(closureData.thisElement);
-      } else if (outermostElement.isFactoryConstructor()) {
-        analyzeTypeVariables(type);
       }
     }
 
     node.visitChildren(this);
   }
 
   // If variables that are declared in the [node] scope are captured and need
   // to be boxed create a box-element and update the [capturingScopes] in the
   // current [closureData].
   // The boxed variables are updated in the [capturedVariableMapping].
@@ skipping 205 matching lines @@
   }
 
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     bool oldInTryStatement = inTryStatement;
     inTryStatement = true;
     node.visitChildren(this);
     inTryStatement = oldInTryStatement;
   }
 }