This legislation or the contemplated amendments would not make somebody stateless who is not already stateless. If you have permanent residents here and they've applied for citizenship, and then they're not entitled to citizenship, the immigration process would become applicable to them. The possibility of removal is not necessarily clear if they have no country to go to. They would be entitled, under the Immigration and Refugee Protection Act, to a risk assessment to assess whether there would be a breach of the charter in sending them to some other jurisdiction.
On April 18th, 2013. See this statement in context.