Program: 107640
Project: 107640
Buggy source:
/** 
 * Invoked by   {@link #connect()} after a check that this<tt>SourceStream</tt> really needs to connect to the associated audio endpoint device has been passed i.e. it is certain that this instance is disconnected.
 * @throws Exception if the <tt>SourceStream</tt> fails to connect to theassociated audio endpoint device. The <tt>Exception</tt> is logged by the <tt>connect()</tt> method.
 */
private void doConnect() throws Exception {
  MediaLocator locator=getLocator();
  if (locator == null)   throw new NullPointerException("String_Node_Str");
  AudioFormat thisFormat=(AudioFormat)getFormat();
  if (thisFormat == null)   throw new NullPointerException("String_Node_Str");
  if (dataSource.aec) {
    CaptureDeviceInfo2 renderDeviceInfo=dataSource.audioSystem.getSelectedDevice(AudioSystem.DataFlow.PLAYBACK);
    if (renderDeviceInfo == null)     throw new NullPointerException("String_Node_Str");
    MediaLocator renderLocator=renderDeviceInfo.getLocator();
    AudioFormat captureFormat=findClosestMatchCaptureSupportedFormat(thisFormat);
    if (captureFormat == null) {
      throw new IllegalStateException("String_Node_Str" + "String_Node_Str" + locator + "String_Node_Str"+ thisFormat);
    }
    AudioFormat renderFormat=findClosestMatch(renderDeviceInfo.getFormats(),thisFormat);
    if (renderFormat == null) {
      throw new IllegalStateException("String_Node_Str" + "String_Node_Str" + renderLocator + "String_Node_Str"+ thisFormat);
    }
    boolean uninitialize=true;
    initializeCapture(locator,captureFormat);
    try {
      initializeRender(renderLocator,renderFormat);
      try {
        initializeAEC(captureFormat,renderFormat,thisFormat);
        uninitialize=false;
      }
  finally {
        if (uninitialize)         uninitializeRender();
      }
    }
  finally {
      if (uninitialize)       uninitializeCapture();
    }
  }
 else   initializeCapture(locator,thisFormat);
  this.format=thisFormat;
}

Fixed version (ground truth):
/** 
 * Invoked by   {@link #connect()} after a check that this<tt>SourceStream</tt> really needs to connect to the associated audio endpoint device has been passed i.e. it is certain that this instance is disconnected.
 * @throws Exception if the <tt>SourceStream</tt> fails to connect to theassociated audio endpoint device. The <tt>Exception</tt> is logged by the <tt>connect()</tt> method.
 */
private void doConnect() throws Exception {
  MediaLocator locator=getLocator();
  if (locator == null)   throw new NullPointerException("String_Node_Str");
  AudioFormat thisFormat=(AudioFormat)getFormat();
  if (thisFormat == null)   throw new NullPointerException("String_Node_Str");
  if (dataSource.aec) {
    CaptureDeviceInfo2 renderDeviceInfo=dataSource.audioSystem.getSelectedDevice(AudioSystem.DataFlow.PLAYBACK);
    if (renderDeviceInfo == null)     throw new NullPointerException("String_Node_Str");
    MediaLocator renderLocator=renderDeviceInfo.getLocator();
    AudioFormat captureFormat=findClosestMatchCaptureSupportedFormat(thisFormat);
    if (captureFormat == null) {
      throw new IllegalStateException("String_Node_Str" + "String_Node_Str" + locator + "String_Node_Str"+ thisFormat);
    }
    AudioFormat renderFormat=findClosestMatch(renderDeviceInfo.getFormats(),thisFormat,NativelySupportedAudioFormat.class);
    if (renderFormat == null) {
      throw new IllegalStateException("String_Node_Str" + "String_Node_Str" + renderLocator + "String_Node_Str"+ thisFormat);
    }
    boolean uninitialize=true;
    initializeCapture(locator,captureFormat);
    try {
      initializeRender(renderLocator,renderFormat);
      try {
        initializeAEC(captureFormat,renderFormat,thisFormat);
        uninitialize=false;
      }
  finally {
        if (uninitialize)         uninitializeRender();
      }
    }
  finally {
      if (uninitialize)       uninitializeCapture();
    }
  }
 else   initializeCapture(locator,thisFormat);
  this.format=thisFormat;
}