# Return a new uninitialized local runtime_variable
	fun new_var(mtype: MType): RuntimeVariable
	do
		mtype = self.anchor(mtype)
		var name = self.get_name("var")
		var res = new RuntimeVariable(name, mtype, mtype)
		self.add_decl("{mtype.ctype} {name} /* : {mtype} */;")
		return res
	end