Program: 103211
Project: 103211
Buggy source:
/** 
 * Ends the call with for this <tt>CallPeer</tt>. Depending on the state of the peer the method would send a CANCEL, BYE, or BUSY_HERE message and set the new state to DISCONNECTED.
 * @param failed indicates if the hangup is following to a call failure orsimply a disconnect
 * @param reasonText the text, if any, to be set on the<tt>ReasonPacketExtension</tt> as the value of its
 * @param reasonOtherExtension the <tt>PacketExtension</tt>, if any, to beset on the <tt>ReasonPacketExtension</tt> as the value of its <tt>otherExtension</tt> property
 */
public void hangup(boolean failed,String reasonText,PacketExtension reasonOtherExtension){
  if (CallPeerState.DISCONNECTED.equals(getState()) || CallPeerState.FAILED.equals(getState())) {
    if (logger.isDebugEnabled())     logger.debug("String_Node_Str" + "String_Node_Str");
    return;
  }
  CallPeerState prevPeerState=getState();
  getMediaHandler().getTransportManager().close();
  if (failed)   setState(CallPeerState.FAILED,reasonText);
 else   setState(CallPeerState.DISCONNECTED,reasonText);
  JingleIQ responseIQ=null;
  if (prevPeerState.equals(CallPeerState.CONNECTED) || CallPeerState.isOnHold(prevPeerState)) {
    responseIQ=JinglePacketFactory.createBye(getProtocolProvider().getOurJID(),peerJID,getJingleSID());
  }
 else   if (CallPeerState.CONNECTING.equals(prevPeerState) || CallPeerState.CONNECTING_WITH_EARLY_MEDIA.equals(prevPeerState) || CallPeerState.ALERTING_REMOTE_SIDE.equals(prevPeerState)) {
    String jingleSID=getJingleSID();
    if (jingleSID == null) {
synchronized (sidSyncRoot) {
        cancelled=true;
        return;
      }
    }
    responseIQ=JinglePacketFactory.createCancel(getProtocolProvider().getOurJID(),peerJID,getJingleSID());
  }
 else   if (prevPeerState.equals(CallPeerState.INCOMING_CALL)) {
    responseIQ=JinglePacketFactory.createBusy(getProtocolProvider().getOurJID(),peerJID,getJingleSID());
  }
 else   if (prevPeerState.equals(CallPeerState.BUSY) || prevPeerState.equals(CallPeerState.FAILED)) {
  }
 else {
    logger.info("String_Node_Str");
  }
  if (responseIQ != null) {
    if (reasonOtherExtension != null) {
      ReasonPacketExtension reason=(ReasonPacketExtension)responseIQ.getExtension(ReasonPacketExtension.ELEMENT_NAME,ReasonPacketExtension.NAMESPACE);
      if (reason != null) {
        reason.setOtherExtension(reasonOtherExtension);
      }
 else       if (reasonOtherExtension instanceof ReasonPacketExtension) {
        responseIQ.setReason((ReasonPacketExtension)reasonOtherExtension);
      }
    }
    getProtocolProvider().getConnection().sendPacket(responseIQ);
  }
}

Fixed version (ground truth):
/** 
 * Ends the call with for this <tt>CallPeer</tt>. Depending on the state of the peer the method would send a CANCEL, BYE, or BUSY_HERE message and set the new state to DISCONNECTED.
 * @param failed indicates if the hangup is following to a call failure orsimply a disconnect
 * @param reasonText the text, if any, to be set on the<tt>ReasonPacketExtension</tt> as the value of its
 * @param reasonOtherExtension the <tt>PacketExtension</tt>, if any, to beset on the <tt>ReasonPacketExtension</tt> as the value of its <tt>otherExtension</tt> property
 */
public void hangup(boolean failed,String reasonText,PacketExtension reasonOtherExtension){
  if (CallPeerState.DISCONNECTED.equals(getState()) || CallPeerState.FAILED.equals(getState())) {
    if (logger.isDebugEnabled())     logger.debug("String_Node_Str" + "String_Node_Str");
    return;
  }
  CallPeerState prevPeerState=getState();
  setState(failed ? CallPeerState.FAILED : CallPeerState.DISCONNECTED,reasonText);
  JingleIQ responseIQ=null;
  if (prevPeerState.equals(CallPeerState.CONNECTED) || CallPeerState.isOnHold(prevPeerState)) {
    responseIQ=JinglePacketFactory.createBye(getProtocolProvider().getOurJID(),peerJID,getJingleSID());
  }
 else   if (CallPeerState.CONNECTING.equals(prevPeerState) || CallPeerState.CONNECTING_WITH_EARLY_MEDIA.equals(prevPeerState) || CallPeerState.ALERTING_REMOTE_SIDE.equals(prevPeerState)) {
    String jingleSID=getJingleSID();
    if (jingleSID == null) {
synchronized (sidSyncRoot) {
        cancelled=true;
        return;
      }
    }
    responseIQ=JinglePacketFactory.createCancel(getProtocolProvider().getOurJID(),peerJID,getJingleSID());
  }
 else   if (prevPeerState.equals(CallPeerState.INCOMING_CALL)) {
    responseIQ=JinglePacketFactory.createBusy(getProtocolProvider().getOurJID(),peerJID,getJingleSID());
  }
 else   if (prevPeerState.equals(CallPeerState.BUSY) || prevPeerState.equals(CallPeerState.FAILED)) {
  }
 else {
    logger.info("String_Node_Str");
  }
  if (responseIQ != null) {
    if (reasonOtherExtension != null) {
      ReasonPacketExtension reason=(ReasonPacketExtension)responseIQ.getExtension(ReasonPacketExtension.ELEMENT_NAME,ReasonPacketExtension.NAMESPACE);
      if (reason != null) {
        reason.setOtherExtension(reasonOtherExtension);
      }
 else       if (reasonOtherExtension instanceof ReasonPacketExtension) {
        responseIQ.setReason((ReasonPacketExtension)reasonOtherExtension);
      }
    }
    getProtocolProvider().getConnection().sendPacket(responseIQ);
  }
}