object_list参数导致的404

@login_required
def issue_list(request):
    s = -1
    if request.GET.has_key('status'):
        s = int(request.GET.get('status'))
    issues = Issue.objects.filter(status=s).order_by('-create_date')
    
    return object_list(
        request,
        queryset=issues,
        template_name='jira/issue_list.html',
        paginate_by = settings.ROWS_PER_PAGE,
        allow_empty = True,
        )
#最初allow_empty = False，issues是空时，object_list会导致404错误，而不是期望的异常。