Program: 22945
Project: 22945
Buggy source:
void showInputMethodMenu(){
  if (DEBUG)   Slog.v(TAG,"String_Node_Str");
  hideInputMethodMenu();
  final Context context=mContext;
  final PackageManager pm=context.getPackageManager();
  String lastInputMethodId=Settings.Secure.getString(context.getContentResolver(),Settings.Secure.DEFAULT_INPUT_METHOD);
  if (DEBUG)   Slog.v(TAG,"String_Node_Str" + lastInputMethodId);
  final List<InputMethodInfo> immis=getEnabledInputMethodList();
  int N=(immis == null ? 0 : immis.size());
  mItems=new CharSequence[N];
  mIms=new InputMethodInfo[N];
  for (int i=0; i < N; ++i) {
    InputMethodInfo property=immis.get(i);
    mItems[i]=property.loadLabel(pm);
    mIms[i]=property;
  }
  int checkedItem=0;
  for (int i=0; i < N; ++i) {
    if (mIms[i].getId().equals(lastInputMethodId)) {
      checkedItem=i;
      break;
    }
  }
  AlertDialog.OnClickListener adocl=new AlertDialog.OnClickListener(){
    public void onClick(    DialogInterface dialog,    int which){
      hideInputMethodMenu();
    }
  }
;
  TypedArray a=context.obtainStyledAttributes(null,com.android.internal.R.styleable.DialogPreference,com.android.internal.R.attr.alertDialogStyle,0);
  mDialogBuilder=new AlertDialog.Builder(context).setTitle(com.android.internal.R.string.select_input_method).setOnCancelListener(new OnCancelListener(){
    public void onCancel(    DialogInterface dialog){
      hideInputMethodMenu();
    }
  }
).setIcon(a.getDrawable(com.android.internal.R.styleable.DialogPreference_dialogTitle));
  a.recycle();
  mDialogBuilder.setSingleChoiceItems(mItems,checkedItem,new AlertDialog.OnClickListener(){
    public void onClick(    DialogInterface dialog,    int which){
synchronized (mMethodMap) {
        InputMethodInfo im=mIms[which];
        hideInputMethodMenu();
        setInputMethodLocked(im.getId());
      }
    }
  }
);
synchronized (mMethodMap) {
    mSwitchingDialog=mDialogBuilder.create();
    mSwitchingDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG);
    mSwitchingDialog.show();
  }
}

Fixed version (ground truth):
void showInputMethodMenu(){
  if (DEBUG)   Slog.v(TAG,"String_Node_Str");
  hideInputMethodMenu();
  final Context context=mContext;
  final PackageManager pm=context.getPackageManager();
  String lastInputMethodId=Settings.Secure.getString(context.getContentResolver(),Settings.Secure.DEFAULT_INPUT_METHOD);
  if (DEBUG)   Slog.v(TAG,"String_Node_Str" + lastInputMethodId);
  final List<InputMethodInfo> immis=getEnabledInputMethodList();
  if (immis == null) {
    return;
  }
  int N=immis.size();
  mItems=new CharSequence[N];
  mIms=new InputMethodInfo[N];
  for (int i=0; i < N; ++i) {
    InputMethodInfo property=immis.get(i);
    if (property == null) {
      i--;
      N--;
      continue;
    }
    mItems[i]=property.loadLabel(pm);
    mIms[i]=property;
  }
  int checkedItem=0;
  for (int i=0; i < N; ++i) {
    if (mIms[i].getId().equals(lastInputMethodId)) {
      checkedItem=i;
      break;
    }
  }
  AlertDialog.OnClickListener adocl=new AlertDialog.OnClickListener(){
    public void onClick(    DialogInterface dialog,    int which){
      hideInputMethodMenu();
    }
  }
;
  TypedArray a=context.obtainStyledAttributes(null,com.android.internal.R.styleable.DialogPreference,com.android.internal.R.attr.alertDialogStyle,0);
  mDialogBuilder=new AlertDialog.Builder(context).setTitle(com.android.internal.R.string.select_input_method).setOnCancelListener(new OnCancelListener(){
    public void onCancel(    DialogInterface dialog){
      hideInputMethodMenu();
    }
  }
).setIcon(a.getDrawable(com.android.internal.R.styleable.DialogPreference_dialogTitle));
  a.recycle();
  mDialogBuilder.setSingleChoiceItems(mItems,checkedItem,new AlertDialog.OnClickListener(){
    public void onClick(    DialogInterface dialog,    int which){
synchronized (mMethodMap) {
        InputMethodInfo im=mIms[which];
        hideInputMethodMenu();
        setInputMethodLocked(im.getId());
      }
    }
  }
);
synchronized (mMethodMap) {
    mSwitchingDialog=mDialogBuilder.create();
    mSwitchingDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG);
    mSwitchingDialog.show();
  }
}