Program: 117667
Project: 117667
Buggy source:
@Override public void execute(Wandora admin,Context context){
  try {
    Map<Association,ArrayList<Topic>> associationsWithRoles=null;
    Topic role=null;
    Association a=null;
    StringBuilder pathString=new StringBuilder("String_Node_Str");
    otherRole=null;
    if (context instanceof AssociationContext) {
      AssociationTable associationTable=null;
      Object contextSource=context.getContextSource();
      if (contextSource instanceof AssociationTable) {
        associationTable=(AssociationTable)context.getContextSource();
      }
      if (associationTable != null) {
        associationsWithRoles=associationTable.getSelectedAssociationsWithSelectedRoles();
      }
      if (associationsWithRoles != null && associationsWithRoles.size() > 0) {
        Set<Association> associationSet=associationsWithRoles.keySet();
        Iterator<Association> associationIterator=associationSet.iterator();
        while (associationIterator.hasNext() && !forceStop()) {
          a=(Association)associationIterator.next();
          if (a != null) {
            ArrayList<Topic> roles=associationsWithRoles.get(a);
            Iterator<Topic> roleIterator=roles.iterator();
            if (roleIterator.hasNext() && !forceStop()) {
              role=roleIterator.next();
              if (role != null) {
                try {
                  Topic outRole=findOtherRole(a,role,admin);
                  if (outRole != null) {
                    Topic player=a.getPlayer(role);
                    ArrayList<Topic> topicPath=TopicTools.getSinglePath(player,a.getType(),role,outRole);
                    Topic pathTopic=null;
                    pathString.append(player.getBaseName());
                    for (Iterator<Topic> pathIter=topicPath.iterator(); pathIter.hasNext(); ) {
                      pathTopic=pathIter.next();
                      pathString.append(TopicToString.toString(pathTopic));
                      if (pathIter.hasNext())                       pathString.append("String_Node_Str");
                    }
                    pathString.append("String_Node_Str");
                  }
                }
 catch (                Exception e) {
                  singleLog(e);
                }
              }
            }
          }
        }
        ClipboardBox.setClipboard(pathString.toString());
      }
 else {
        singleLog("String_Node_Str");
      }
    }
 else {
      singleLog("String_Node_Str");
    }
  }
 catch (  Exception e) {
    singleLog(e);
  }
}

Fixed version (ground truth):
@Override public void execute(Wandora admin,Context context){
  try {
    Map<Association,ArrayList<Topic>> associationsWithRoles=null;
    Topic role=null;
    Association a=null;
    StringBuilder pathString=new StringBuilder("String_Node_Str");
    otherRole=null;
    if (context instanceof AssociationContext) {
      AssociationTable associationTable=null;
      Object contextSource=context.getContextSource();
      if (contextSource instanceof AssociationTable) {
        associationTable=(AssociationTable)context.getContextSource();
      }
      if (associationTable != null) {
        associationsWithRoles=associationTable.getSelectedAssociationsWithSelectedRoles();
      }
      if (associationsWithRoles != null && associationsWithRoles.size() > 0) {
        Set<Association> associationSet=associationsWithRoles.keySet();
        Iterator<Association> associationIterator=associationSet.iterator();
        while (associationIterator.hasNext() && !forceStop()) {
          a=(Association)associationIterator.next();
          if (a != null) {
            ArrayList<Topic> roles=associationsWithRoles.get(a);
            Iterator<Topic> roleIterator=roles.iterator();
            if (roleIterator.hasNext() && !forceStop()) {
              role=roleIterator.next();
              if (role != null) {
                try {
                  Topic outRole=findOtherRole(a,role,admin);
                  if (outRole != null) {
                    Topic player=a.getPlayer(role);
                    List<Topic> topicPath=TopicTools.getSinglePath(player,a.getType(),role,outRole);
                    Topic pathTopic=null;
                    pathString.append(player.getBaseName());
                    for (Iterator<Topic> pathIter=topicPath.iterator(); pathIter.hasNext(); ) {
                      pathTopic=pathIter.next();
                      pathString.append(TopicToString.toString(pathTopic));
                      if (pathIter.hasNext())                       pathString.append("String_Node_Str");
                    }
                    pathString.append("String_Node_Str");
                  }
                }
 catch (                Exception e) {
                  singleLog(e);
                }
              }
            }
          }
        }
        ClipboardBox.setClipboard(pathString.toString());
      }
 else {
        singleLog("String_Node_Str");
      }
    }
 else {
      singleLog("String_Node_Str");
    }
  }
 catch (  Exception e) {
    singleLog(e);
  }
}