StringIndexOutOfBoundsException thrown in InetAddress.getAllByname()

Running the following code results in an unexpected exception:

public class Test {
    public static void main(String args[]) throws Exception {
InetAddress[] l = InetAddress.getAllByName(args[0]);
System.err.println("l.length = " + l.length);
System.err.println(l[0]);
    }
}


$ java Test "[]"
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 0
        at java.lang.String.charAt(String.java:438)
        at java.net.InetAddress.getAllByName(InetAddress.java:868)
        at Test.main(Test.java:5)