1// Copyright 2009 the V8 project authors. All rights reserved.
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3// modification, are permitted provided that the following conditions are
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27
28// Test collection of abandoned maps.  Tests that deleted map
29// transitions do not show up as properties in for in.
30
31// Flags: --expose-gc --collect-maps
32
33function C() {}
34
35
36// Create an instance of C.  Add a property to the instance and then
37// remove all references to instances of C.
38var o = new C();
39o.x = 42;
40o = null;
41
42// Force a global GC. This will collect the maps starting from C and
43// delete map transitions.
44gc();
45
46// Create a new instance of C.
47o = new C();
48
49// Test that the deleted map transitions do not show up in for in.
50for (var p in o) {
51  assertTrue(false);
52}
53