Program: 62166
Project: 62166
Buggy source:
@Override public void actionPerformed(ActionEvent e){
  if (e.getActionCommand().equals("String_Node_Str")) {
    foundPos=0;
    searchPanel.setVisible(false);
    found=new ArrayList<>();
    searchFor=null;
  }
  if (e.getActionCommand().equals("String_Node_Str")) {
    foundPos--;
    if (foundPos < 0) {
      foundPos+=found.size();
    }
    updateSearchPos();
  }
  if (e.getActionCommand().equals("String_Node_Str")) {
    foundPos=(foundPos + 1) % found.size();
    updateSearchPos();
  }
  if (e.getActionCommand().equals("String_Node_Str")) {
    if (lastCode != null) {
      GraphFrame gf=new GraphFrame(new ActionGraph(lastCode,new HashMap<Integer,String>(),new HashMap<String,GraphTargetItem>(),new HashMap<String,GraphTargetItem>(),SWF.DEFAULT_VERSION),"String_Node_Str");
      gf.setVisible(true);
    }
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setEditMode(true);
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setHex(hexButton.isSelected());
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setEditMode(false);
    setHex(hexButton.isSelected());
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    try {
      src.setActions(ASMParser.parse(0,src.getPos(),true,new ByteArrayInputStream(editor.getText().getBytes()),SWF.DEFAULT_VERSION),SWF.DEFAULT_VERSION);
      setSource(this.src,false);
      JOptionPane.showMessageDialog(this,"String_Node_Str");
      saveButton.setVisible(false);
      cancelButton.setVisible(false);
      editButton.setVisible(true);
      editor.setEditable(false);
      editMode=false;
    }
 catch (    IOException ex) {
    }
catch (    ParseException ex) {
      JOptionPane.showMessageDialog(this,"String_Node_Str" + ex.text + "String_Node_Str"+ ex.line,"String_Node_Str",JOptionPane.ERROR_MESSAGE);
    }
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setDecompiledEditMode(true);
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setDecompiledEditMode(false);
    decompiledEditor.setText(lastDecompiled);
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    try {
      ActionScriptParser par=new ActionScriptParser();
      src.setActions(par.parse(decompiledEditor.getText()),SWF.DEFAULT_VERSION);
      setSource(this.src,false);
      JOptionPane.showMessageDialog(this,"String_Node_Str");
      saveDecompiledButton.setVisible(false);
      cancelDecompiledButton.setVisible(false);
      editDecompiledButton.setVisible(true);
      experimentalLabel.setVisible(true);
      decompiledEditor.setEditable(false);
      editDecompiledMode=false;
    }
 catch (    IOException ex) {
    }
catch (    ParseException ex) {
      JOptionPane.showMessageDialog(this,"String_Node_Str" + ex.text + "String_Node_Str"+ ex.line,"String_Node_Str",JOptionPane.ERROR_MESSAGE);
    }
  }
}

Fixed version (ground truth):
@Override public void actionPerformed(ActionEvent e){
  if (e.getActionCommand().equals("String_Node_Str")) {
    foundPos=0;
    searchPanel.setVisible(false);
    found=new ArrayList<>();
    searchFor=null;
  }
  if (e.getActionCommand().equals("String_Node_Str")) {
    foundPos--;
    if (foundPos < 0) {
      foundPos+=found.size();
    }
    updateSearchPos();
  }
  if (e.getActionCommand().equals("String_Node_Str")) {
    foundPos=(foundPos + 1) % found.size();
    updateSearchPos();
  }
  if (e.getActionCommand().equals("String_Node_Str")) {
    if (lastCode != null) {
      GraphFrame gf=new GraphFrame(new ActionGraph(lastCode,new HashMap<Integer,String>(),new HashMap<String,GraphTargetItem>(),new HashMap<String,GraphTargetItem>(),SWF.DEFAULT_VERSION),"String_Node_Str");
      gf.setVisible(true);
    }
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setEditMode(true);
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setHex(hexButton.isSelected());
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setEditMode(false);
    setHex(hexButton.isSelected());
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    try {
      src.setActions(ASMParser.parse(0,src.getPos(),true,new StringReader(editor.getText()),SWF.DEFAULT_VERSION),SWF.DEFAULT_VERSION);
      setSource(this.src,false);
      JOptionPane.showMessageDialog(this,"String_Node_Str");
      saveButton.setVisible(false);
      cancelButton.setVisible(false);
      editButton.setVisible(true);
      editor.setEditable(false);
      editMode=false;
    }
 catch (    IOException ex) {
    }
catch (    ParseException ex) {
      JOptionPane.showMessageDialog(this,"String_Node_Str" + ex.text + "String_Node_Str"+ ex.line,"String_Node_Str",JOptionPane.ERROR_MESSAGE);
    }
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setDecompiledEditMode(true);
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    setDecompiledEditMode(false);
    decompiledEditor.setText(lastDecompiled);
  }
 else   if (e.getActionCommand().equals("String_Node_Str")) {
    try {
      ActionScriptParser par=new ActionScriptParser();
      src.setActions(par.parse(decompiledEditor.getText()),SWF.DEFAULT_VERSION);
      setSource(this.src,false);
      JOptionPane.showMessageDialog(this,"String_Node_Str");
      saveDecompiledButton.setVisible(false);
      cancelDecompiledButton.setVisible(false);
      editDecompiledButton.setVisible(true);
      experimentalLabel.setVisible(true);
      decompiledEditor.setEditable(false);
      editDecompiledMode=false;
    }
 catch (    IOException ex) {
    }
catch (    ParseException ex) {
      JOptionPane.showMessageDialog(this,"String_Node_Str" + ex.text + "String_Node_Str"+ ex.line,"String_Node_Str",JOptionPane.ERROR_MESSAGE);
    }
  }
}