Catch corrupted pointers earlier.

runtime/vm/scavenger_test.cc

 // Copyright (c) 2014, 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.
 
 #include "platform/assert.h"
 #include "vm/scavenger.h"
 #include "vm/unit_test.h"
 #include "vm/visitor.h"
 
 namespace dart {
@@ skipping 34 matching lines @@
   EXPECT_EQ(static_cast<uword>(0), scavenger->TryAllocate(kObjectAlignment));
   FailingObjectVisitor obj_visitor;
   scavenger->VisitObjects(&obj_visitor);
   FailingObjectPointerVisitor ptr_visitor;
   scavenger->VisitObjectPointers(&ptr_visitor);
   FailingFindObjectVisitor find_visitor;
   scavenger->FindObject(&find_visitor);
   delete scavenger;
 }
 
-TEST_CASE(ZeroSizeScavengerGC) {
-  // Ensure 'Scavenge' doesn't crash. We must supply an actual heap.
-  Scavenger* scavenger =
-      new Scavenger(Isolate::Current()->heap(), 0, kNewObjectAlignmentOffset);
-  scavenger->Scavenge();
-  delete scavenger;
-}
-
 }  // namespace dart