  def _testBadInputSize(self,
                        tin=None,
                        tfilter=None,
                        min_input=None,
                        max_input=None,
                        min_filter=None,
                        max_filter=None,
                        error_regex=""):
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.