An attempt to get a sequencer from the system leads to MidiUnavailableException if run with -Xfuture option.

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package testapp.sound.midi;

import java.io.File;
import java.net.URL;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.Sequence;
import javax.sound.midi.Sequencer;

public class OpenSequencer {
    public static void main(String[] args) {
        OpenSequencer inst = new OpenSequencer();
        
        try {
            inst.m1(args);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public void m1(String[] args) throws Exception {

        String midiFile = args[0];
        Sequence sequence = MidiSystem.getSequence(new File(midiFile));
    
        Sequencer sequencer = MidiSystem.getSequencer();
        sequencer.open();
        sequencer.setSequence(sequence);
    
        sequencer.start();
        Thread.sleep(sequence.getMicrosecondLength() / 1000);
        sequencer.stop();
        sequencer.close();
    }
}
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$ java -version
openjdk version "1.6.0-internal"
OpenJDK Runtime Environment (build 1.6.0-internal-dherron_19_dec_2007_13_45-b00)
Java HotSpot(TM) Client VM (build 11.0-b06, mixed mode)

$ java -Xfuture -cp . testapp.sound.midi.OpenSequencer [VALID_FILE.MID]
javax.sound.midi.MidiUnavailableException: Audio Device Unavailable
        at com.sun.media.sound.MixerSynth.implOpen(MixerSynth.java:163)
        at com.sun.media.sound.AbstractMidiDevice.doOpen(AbstractMidiDevice.java:162)
        at com.sun.media.sound.AbstractMidiDevice.openInternal(AbstractMidiDevice.java:152)
        at com.sun.media.sound.AbstractMidiDevice.getReceiverReferenceCounting(AbstractMidiDevice.java:357)
        at javax.sound.midi.MidiSystem.getReceiver(MidiSystem.java:261)
        at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:460)
        at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:366)
        at testapp.sound.midi.OpenSequencer.m1(OpenSequencer.java:25)
        at testapp.sound.midi.OpenSequencer.main(OpenSequencer.java:14)
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If no -Xfuture option is provided, the code works fine.