Generative constructors in the new dart backend.

pkg/compiler/lib/src/dart_backend/placeholder_collector.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.
 
 part of dart_backend;
 
 class LocalPlaceholder {
   final String identifier;
   final Set<Node> nodes;
   LocalPlaceholder(this.identifier) : nodes = new Set<Node>();
@@ skipping 601 matching lines @@
       }
     }
     node.visitChildren(this);
   }
 
   visitFunctionExpression(FunctionExpression node) {
     bool isKeyword(Identifier id) =>
         id != null && Keyword.keywords[id.source] != null;
 
     Element element = treeElements[node];
-    // May get null here in case of A(int this.f());
+    // May get null;
     if (element != null) {
       tryMakePrivateIdentifier(node.name, element);
 
       // Rename only local functions.
-      if (topmostEnclosingFunction == null) {
+      if (topmostEnclosingFunction == null &&
+          element is! LocalParameterElement &&
+          element is! InitializingFormalElement) {
         topmostEnclosingFunction = element;
       }
       if (!identical(element, currentElement)) {
         if (node.name != null) {
           assert(node.name is Identifier);
           tryMakeLocalPlaceholder(element, node.name);
         }
       }
     }
 
@@ skipping 54 matching lines @@
 
   visitBlock(Block node) {
     for (Node statement in node.statements.nodes) {
       if (statement is VariableDefinitions) {
         makeVarDeclarationTypePlaceholder(statement);
       }
     }
     node.visitChildren(this);
   }
 }