Program: 37666
Project: 37666
Buggy source:
public void showMemory(){
  int from=0;
  int to=0;
  try {
    String toString=toText.getText().trim();
    from=Integer.parseInt(fromText.getText().trim());
    to=(toString.length() == 0) ? from : Integer.parseInt(toString);
    if ((from < 0) || (from > 15999) || (to < 0)|| (to > 15999)|| (from > to)) {
      throw new Exception("String_Node_Str");
    }
  }
 catch (  Exception ex) {
    memoryArea.setText("String_Node_Str" + ex.getMessage());
    return;
  }
  setTitle("String_Node_Str" + from + "String_Node_Str"+ to);
  int offset=to - from;
  int last=offset - (offset % 50) + from;
  StringBuilder buffer=new StringBuilder(1024);
  if (Simulator.isActive()) {
synchronized (Simulator.class) {
      Simulator.output();
      Simulator.execute("String_Node_Str" + from + "String_Node_Str"+ to);
      for (; ; ) {
        String text=Simulator.output();
        if (TextIsValidForMemoryDump(text)) {
          int idx=text.indexOf("String_Node_Str");
          if (idx > 0 && idx <= 6) {
            StringBuilder strBuild=new StringBuilder(text);
            strBuild.setCharAt(idx,' ');
            text=strBuild.toString();
          }
          buffer.append(text).append('\n');
          if (idx >= 0 && idx <= 6) {
            try {
              String numberStr=text.substring(0,idx).replaceAll("String_Node_Str","String_Node_Str");
              int address=Integer.parseInt(numberStr);
              if (address == last) {
                break;
              }
            }
 catch (            Exception ex) {
              ex.printStackTrace();
            }
          }
        }
      }
      do {
        String text=Simulator.output();
        if ((text != null) && (text.length() > 0)) {
          buffer.append(text).append('\n');
        }
      }
 while (Simulator.hasOutput());
    }
  }
  memoryArea.setText(buffer.toString());
  memoryArea.setEnabled(true);
}

Fixed version (ground truth):
public void showMemory(){
  int from=0;
  int to=0;
  try {
    String toString=toText.getText().trim();
    from=Integer.parseInt(fromText.getText().trim());
    to=(toString.length() == 0) ? from : Integer.parseInt(toString);
    if ((from < 0) || (from > 15999) || (to < 0)|| (to > 15999)|| (from > to)) {
      throw new Exception("String_Node_Str");
    }
  }
 catch (  Exception ex) {
    memoryArea.setText("String_Node_Str" + ex.getMessage());
    return;
  }
  setTitle("String_Node_Str" + from + "String_Node_Str"+ to);
  int offset=to - from;
  int last=offset - (offset % 50) + from;
  StringBuilder buffer=new StringBuilder(1024);
  if (Simulator.isActive()) {
synchronized (Simulator.class) {
      Simulator.output();
      Simulator.execute("String_Node_Str" + from + "String_Node_Str"+ to);
      Boolean nothingYet=true;
      while (true) {
        String text=Simulator.output();
        if (!nothingYet && text.length() == 0) {
          break;
        }
 else         if (nothingYet && text.length() > 0) {
          nothingYet=false;
        }
        if (TextIsValidForMemoryDump(text)) {
          int idx=text.indexOf("String_Node_Str");
          if (idx > 0 && idx <= 6) {
            StringBuilder strBuild=new StringBuilder(text);
            strBuild.setCharAt(idx,' ');
            text=strBuild.toString();
          }
          buffer.append(text).append('\n');
          if (idx >= 0 && idx <= 6) {
            try {
              String numberStr=text.substring(0,idx).replaceAll("String_Node_Str","String_Node_Str");
              int address=Integer.parseInt(numberStr);
              if (address == last) {
                break;
              }
            }
 catch (            Exception ex) {
              ex.printStackTrace();
            }
          }
        }
      }
      do {
        String text=Simulator.output();
        if ((text != null) && (text.length() > 0)) {
          buffer.append(text).append('\n');
        }
      }
 while (Simulator.hasOutput());
    }
  }
  memoryArea.setText(buffer.toString());
  memoryArea.setEnabled(true);
}