BUG=chromium:151750
Review URL: https://chromiumcodereview.appspot.com/
10989076
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12629
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
old_target->SetBackPointer(GetHeap()->undefined_value());
MaybeObject* maybe_failure = old_target->SetDescriptors(old_descriptors);
- if (maybe_failure->IsFailure()) return maybe_failure;
+ // Reset the backpointer before returning failure, otherwise the map ends up
+ // with an undefined backpointer and no descriptors, losing its own
+ // descriptors. Setting the backpointer always succeeds.
old_target->SetBackPointer(old_map);
+ if (maybe_failure->IsFailure()) return maybe_failure;
old_map->set_owns_descriptors(true);
}