pushquery(QPRS_STATE *state, int32 type, int32 val, int32 distance, int32 lenval, uint16 flag)
{
	NODE	   *tmp = (NODE *) palloc(sizeof(NODE));

	tmp->type = type;
	tmp->val = val;
	tmp->flag = flag;
	if (distance > 0xffff)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
				 errmsg("value is too big")));
	if (lenval > 0xff)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
				 errmsg("operand is too long")));
	tmp->distance = distance;
	tmp->length = lenval;
	tmp->next = state->str;
	state->str = tmp;
	state->num++;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.