Final variables induce a setter that throws NSME

runtime/vm/ast.h

 // 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.
 
 #ifndef VM_AST_H_
 #define VM_AST_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/growable_array.h"
@@ skipping 1097 matching lines @@
       : AstNode(token_pos), field_(field) {
     ASSERT(field_.IsZoneHandle());
   }
 
   const Field& field() const { return field_; }
 
   virtual void VisitChildren(AstNodeVisitor* visitor) const { }
 
   virtual AstNode* MakeAssignmentNode(AstNode* rhs);
 
+  virtual bool IsPotentiallyConst() const {
+    return field_.is_const();
+  }
+
   virtual const Instance* EvalConstExpr() const {
     ASSERT(field_.is_static());
     return field_.is_const() ? &Instance::ZoneHandle(field_.value()) : NULL;
   }
 
   DECLARE_COMMON_NODE_FUNCTIONS(LoadStaticFieldNode);
 
  private:
   const Field& field_;
 
@@ skipping 625 matching lines @@
   const intptr_t try_index_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(InlinedFinallyNode);
 };
 
 }  // namespace dart
 
 #undef DECLARE_COMMON_NODE_FUNCTIONS
 
 #endif  // VM_AST_H_