- Fix another side effect issue: never add AstNode to sequence unless they are a statement. Added t…

tests/language/compound_assignment_operator_test.dart

 // 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.
 // Tests that lhs of a compound assignement is executed only once.
 
 
 class Indexed {
   Indexed() : _f = new List(10), count = 0 {
     _f[0] = 100;
     _f[1] = 200;
   }
   operator [](i) {
     count++;
     return _f;
   }
   var count;
   var _f;
 }
 
 var result;
 
 class A {
   get field() { result.add(1); return 1; }
   set field(value) {}
+
+  static get static_field() { result.add(0); return 1; }
+  static set static_field(value) { result.add(1); }
 }
 
 
 class CompoundAssignmentOperatorTest {
 
   static void testIndexed() {
     Indexed indexed = new Indexed();
     Expect.equals(0, indexed.count);
     var tmp = indexed[0];
     Expect.equals(1, indexed.count);
@@ skipping 24 matching lines @@
   }
   
   static testIndexedMoreMore() {
     result = [];
     middle() { result.add(2); }
     obj() { result.add(0); return new A(); }
     sequence(a, b, c) { result.add(3); }
 
     sequence(obj().field += 1, middle(), obj().field += 1);
     Expect.listEquals([0, 1, 2, 0, 1, 3], result);
+
+    result = [];
+    sequence(A.static_field++, middle(), A.static_field++);
+    Expect.listEquals([0, 1, 2, 0, 1, 3], result);    
   }
   
 
   static void testMain() {
-    testIndexed();
-    testIndexedMore();
-    testIndexedMoreMore();
+    for (int i = 0; i < 1000; i++) {
+      testIndexed();
+      testIndexedMore();
+      testIndexedMoreMore();
+    }
   }
 }
 
 main() {
   CompoundAssignmentOperatorTest.testMain();
 }