Fix mjsunit/compiler/concurrent-invalidate-transition-map.js test.

test/mjsunit/compiler/concurrent-invalidate-transition-map.js

Index: test/mjsunit/compiler/concurrent-invalidate-transition-map.js
diff --git a/test/mjsunit/compiler/concurrent-invalidate-transition-map.js b/test/mjsunit/compiler/concurrent-invalidate-transition-map.js
index 2a20790eaaa03e693fcc32d977b7de49fb2907eb..ab7d6d50ee10b0d2dff8f869a9c1ccd31e730ab9 100644
--- a/test/mjsunit/compiler/concurrent-invalidate-transition-map.js
+++ b/test/mjsunit/compiler/concurrent-invalidate-transition-map.js
@@ -43,9 +43,10 @@ function new_object() {
 function add_field(obj) {
   obj.c = 3;
 }
-
-add_field(new_object());
-add_field(new_object());
+var obj1 = new_object();
+var obj2 = new_object();
+add_field(obj1);
+add_field(obj2);
 %OptimizeFunctionOnNextCall(add_field, "concurrent");
 
 var o = new_object();