Fix Regress1465 on gc stress builder.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2197 matching lines @@
 }
 
 static int CountMapTransitions(Map* map) {
   return map->transitions()->number_of_transitions();
 }
 
 
 // Test that map transitions are cleared and maps are collected with
 // incremental marking as well.
 TEST(Regress1465) {
+  i::FLAG_stress_compaction = false;
   i::FLAG_allow_natives_syntax = true;
   i::FLAG_trace_incremental_marking = true;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   static const int transitions_count = 256;
 
   {
     AlwaysAllocateScope always_allocate;
     for (int i = 0; i < transitions_count; i++) {
       EmbeddedVector<char, 64> buffer;
@@ skipping 944 matching lines @@
              "    var a = new Array(n);"
              "    for (var i = 0; i < n; i += 100) a[i] = i;"
              "};"
              "f(10 * 1024 * 1024);");
   IncrementalMarking* marking = HEAP->incremental_marking();
   if (marking->IsStopped()) marking->Start();
   // This big step should be sufficient to mark the whole array.
   marking->Step(100 * MB, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
   ASSERT(marking->IsComplete());
 }