Don't access stack-allocated variable when it is out of scope. Enable Isolate cleanup in cctests ag…

test/cctest/cctest.h

 // Copyright 2008 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 113 matching lines @@
   // Only for UNINITIALIZED_TESTs
   static void DisableAutomaticDispose();
 
   // Helper function to configure a context.
   // Must be in a HandleScope.
   static v8::Local<v8::Context> NewContext(
       CcTestExtensionFlags extensions,
       v8::Isolate* isolate = CcTest::isolate());
 
   static void TearDown() {
-    // TODO(svenpanne) Enable this when our cctests are fixed.
-    // if (isolate_ != NULL) isolate_->Dispose();
+    if (isolate_ != NULL) isolate_->Dispose();
   }
 
  private:
   friend int main(int argc, char** argv);
   TestFunction* callback_;
   const char* file_;
   const char* name_;
   const char* dependency_;
   bool enabled_;
   bool initialize_;
@@ skipping 226 matching lines @@
     CHECK_EQ(0, heap_profiler_->heap_object_map()->FindUntrackedObjects());
     heap_profiler_->StopHeapObjectsTracking();
   }
 
  private:
   i::HeapProfiler* heap_profiler_;
 };
 
 
 #endif  // ifndef CCTEST_H_