Capturing for loop variables correctly

runtime/vm/ast.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_AST_H_
 #define VM_AST_H_
 
 #include "vm/allocation.h"
 #include "vm/assert.h"
 #include "vm/growable_array.h"
@@ skipping 24 matching lines @@
   V(WhileNode, "while")                                                        \
   V(DoWhileNode, "dowhile")                                                    \
   V(ForNode, "for")                                                            \
   V(JumpNode, "jump")                                                          \
   V(ArgumentListNode, "args")                                                  \
   V(ArrayNode, "array")                                                        \
   V(ClosureNode, "closure")                                                    \
   V(InstanceCallNode, "instance call")                                         \
   V(StaticCallNode, "static call")                                             \
   V(ClosureCallNode, "closure call")                                           \
+  V(CloneContextNode, "clone context")                                         \
   V(ConstructorCallNode, "constructor call")                                   \
   V(InstanceGetterNode, "instance getter call")                                \
   V(InstanceSetterNode, "instance setter call")                                \
   V(StaticGetterNode, "static getter")                                         \
   V(StaticSetterNode, "static setter")                                         \
   V(NativeBodyNode, "native body")                                             \
   V(PrimaryNode, "primary")                                                    \
   V(LoadLocalNode, "load local")                                               \
   V(StoreLocalNode, "store local")                                             \
   V(LoadInstanceFieldNode, "load field")                                       \
@@ skipping 171 matching lines @@
 
  private:
   LocalScope* scope_;
   GrowableArray<AstNode*> nodes_;
   SourceLabel* label_;
 
   DISALLOW_COPY_AND_ASSIGN(SequenceNode);
 };
 
 
+class CloneContextNode : public AstNode {
+ public:
+  explicit CloneContextNode(intptr_t token_index)
+    : AstNode(token_index) {
+  }
+
+  virtual void VisitChildren(AstNodeVisitor* visitor) const { }
+
+  DECLARE_COMMON_NODE_FUNCTIONS(CloneContextNode);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CloneContextNode);
+};
+
+
 class  ArgumentListNode : public AstNode {
  public:
   explicit ArgumentListNode(intptr_t token_index)
      : AstNode(token_index),
        nodes_(4),
        names_(Array::ZoneHandle()) {
   }
 
   void VisitChildren(AstNodeVisitor* visitor) const;
 
@@ skipping 1620 matching lines @@
   const LocalVariable& context_var_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(InlinedFinallyNode);
 };
 
 }  // namespace dart
 
 #undef DECLARE_COMMON_NODE_FUNCTIONS
 
 #endif  // VM_AST_H_