There is an unsaved comment in progress. You will lose your changes if you continue. Are you sure you want to reopen the work item?
Array iteration methods may continue after a reference to the array has been deleted
I think these tests are making an incorrect assertion:
In these tests the object property is being deleted, but that doesn't mean that the value itself is deleted - the method being called (e.g. every or filter) still has a reference to the array it's operating on.