# Compile a statement (if any)
	fun stmt(nexpr: nullable AExpr) do
		if nexpr == null then return
		if nexpr.mtype == null and not nexpr.is_typed then
			# Untyped expression.
			# Might mean dead code or invalid code
			# so aborts
			add_abort("FATAL: bad statement executed.")
			return
		end

		var old = self.current_node
		current_node = nexpr
		nexpr.stmt(self)
		current_node = old
	end