Program: 38070
Project: 38070
Buggy source:
@Override protected void onHandleIntent(Intent intent){
  context=this;
  settings=PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
  extras=intent.getExtras();
  Gson gson=new Gson();
  boolean autoSync;
  try {
    autoSync=extras.getBoolean("String_Node_Str");
  }
 catch (  NullPointerException e) {
    autoSync=false;
  }
  ConnectivityManager conMan=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
  State wifi=conMan.getNetworkInfo(1).getState();
  if (wifi == NetworkInfo.State.CONNECTED || autoSync == false || settings.getBoolean("String_Node_Str",false) == false) {
    Log.d("String_Node_Str","String_Node_Str" + wifi);
    Log.d("String_Node_Str","String_Node_Str" + autoSync);
    Log.d("String_Node_Str","String_Node_Str" + Boolean.valueOf(settings.getBoolean("String_Node_Str",false)));
    Log.d("String_Node_Str","String_Node_Str");
    try {
      BaseParser parser=((VertretungsplanApplication)getApplication()).getParser();
      if (parser == null)       return;
      Vertretungsplan v=parser.getVertretungsplan();
      int result=RESULT_OK;
      if (extras != null && extras.get("String_Node_Str") != null) {
        nachrichtAnApp(extras,result,v);
      }
      if ((extras == null || extras.getBoolean(KEY_NOTIFICATION,true)) && settings.getBoolean("String_Node_Str",true) && !settings.getBoolean("String_Node_Str",false)) {
        String klasse=settings.getString("String_Node_Str",null);
        String vAltJson=settings.getString("String_Node_Str",null);
        if (klasse != null && vAltJson != null) {
          Vertretungsplan vAlt=gson.fromJson(vAltJson,Vertretungsplan.class);
          if (somethingChanged(vAlt,v,klasse)) {
            benachrichtigung();
          }
        }
      }
      settings.edit().putString("String_Node_Str",gson.toJson(v)).commit();
      AppWidgetManager mgr=AppWidgetManager.getInstance(this);
      int[] ids=mgr.getAppWidgetIds(new ComponentName(this,VertretungsplanWidgetProvider.class));
      new VertretungsplanWidgetProvider().onUpdate(this,mgr,ids);
    }
 catch (    IOException|JSONException e) {
      e.printStackTrace();
      int result=RESULT_ERROR;
      if (extras != null && extras.get("String_Node_Str") != null) {
        nachrichtAnApp(extras,result,null);
      }
    }
catch (    VersionException e) {
      int result=RESULT_VERSION_ERROR;
      if (extras != null && extras.get("String_Node_Str") != null) {
        nachrichtAnApp(extras,result,null);
      }
    }
catch (    UnauthorizedException e) {
      int result=RESULT_UNAUTHORIZED_ERROR;
      if (extras != null && extras.get("String_Node_Str") != null) {
        nachrichtAnApp(extras,result,null);
      }
    }
  }
}

Fixed version (ground truth):
@Override protected void onHandleIntent(Intent intent){
  context=this;
  settings=PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
  extras=intent.getExtras();
  Gson gson=new Gson();
  boolean autoSync;
  try {
    autoSync=extras.getBoolean("String_Node_Str");
  }
 catch (  NullPointerException e) {
    autoSync=false;
  }
  ConnectivityManager conMan=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
  State wifi=conMan.getNetworkInfo(1).getState();
  if (wifi == NetworkInfo.State.CONNECTED || autoSync == false || settings.getBoolean("String_Node_Str",false) == false) {
    Log.d("String_Node_Str","String_Node_Str" + wifi);
    Log.d("String_Node_Str","String_Node_Str" + autoSync);
    Log.d("String_Node_Str","String_Node_Str" + Boolean.valueOf(settings.getBoolean("String_Node_Str",false)));
    Log.d("String_Node_Str","String_Node_Str");
    try {
      BaseParser parser=((VertretungsplanApplication)getApplication()).getParser();
      if (parser == null)       return;
      Vertretungsplan v=parser.getVertretungsplan();
      settings.edit().putString("String_Node_Str",gson.toJson(v)).commit();
      AppWidgetManager mgr=AppWidgetManager.getInstance(this);
      int[] ids=mgr.getAppWidgetIds(new ComponentName(this,VertretungsplanWidgetProvider.class));
      new VertretungsplanWidgetProvider().onUpdate(this,mgr,ids);
    }
 catch (    IOException|JSONException e) {
      e.printStackTrace();
    }
catch (    VersionException e) {
    }
catch (    UnauthorizedException e) {
    }
  }
}