Reverting bad fix of issue #26941.

runtime/vm/parser.cc

 // 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.
 
 #include "vm/parser.h"
 #include "vm/flags.h"
 
 #ifndef DART_PRECOMPILED_RUNTIME
 
 #include "lib/invocation_mirror.h"
@@ skipping 9036 matching lines @@
   current_block_->scope->AddVariable(iterator_var);
 
   // Generate initialization of iterator variable.
   ArgumentListNode* no_args = new(Z) ArgumentListNode(collection_pos);
   AstNode* get_iterator = new(Z) InstanceGetterNode(
       collection_pos, collection_expr, Symbols::Iterator());
   AstNode* iterator_init =
       new(Z) StoreLocalNode(collection_pos, iterator_var, get_iterator);
   current_block_->statements->Add(iterator_init);
 
+  // Generate while loop condition.
+  AstNode* iterator_moveNext = new(Z) InstanceCallNode(
+      collection_pos,
+      new(Z) LoadLocalNode(collection_pos, iterator_var),
+      Symbols::MoveNext(),
+      no_args);
+
   // Parse the for loop body. Ideally, we would use ParseNestedStatement()
   // here, but that does not work well because we have to insert an implicit
   // variable assignment and potentially a variable declaration in the
   // loop body.
   OpenLoopBlock();
   current_block_->scope->AddLabel(label);
   const TokenPosition loop_var_assignment_pos = TokenPos();
 
-  // Generate while loop condition.
-  AstNode* iterator_moveNext = new(Z) InstanceCallNode(
-      loop_var_assignment_pos,
-      new(Z) LoadLocalNode(loop_var_assignment_pos, iterator_var),
-      Symbols::MoveNext(),
-      no_args);
-
   AstNode* iterator_current = new(Z) InstanceGetterNode(
       loop_var_assignment_pos,
       new(Z) LoadLocalNode(loop_var_assignment_pos, iterator_var),
       Symbols::Current());
 
   // Generate assignment of next iterator value to loop variable.
   AstNode* loop_var_assignment = NULL;
   if (new_loop_var) {
     // The for loop variable is new for each iteration.
     // Create a variable and add it to the loop body scope.
@@ skipping 5578 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED_RUNTIME