Program: 22124
Project: 22124
Buggy source:
void updateProvidersForPackageLocked(String pkgName){
  HashSet<String> keep=new HashSet<String>();
  Intent intent=new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
  intent.setPackage(pkgName);
  List<ResolveInfo> broadcastReceivers=mPackageManager.queryBroadcastReceivers(intent,PackageManager.GET_META_DATA);
  int N=broadcastReceivers == null ? 0 : broadcastReceivers.size();
  for (int i=0; i < N; i++) {
    ResolveInfo ri=broadcastReceivers.get(i);
    ActivityInfo ai=ri.activityInfo;
    if (pkgName.equals(ai.packageName)) {
      ComponentName component=new ComponentName(ai.packageName,ai.name);
      Provider p=lookupProviderLocked(component);
      if (p == null) {
        if (addProviderLocked(ri)) {
          keep.add(ai.name);
        }
      }
 else {
        Provider parsed=parseProviderInfoXml(component,ri);
        if (parsed != null) {
          keep.add(ai.name);
          p.info=parsed.info;
          final int M=p.instances.size();
          if (M > 0) {
            int[] appWidgetIds=getAppWidgetIds(p);
            cancelBroadcasts(p);
            registerForBroadcastsLocked(p,appWidgetIds);
            for (int j=0; j < M; j++) {
              AppWidgetId id=p.instances.get(j);
              if (id.host != null && id.host.callbacks != null) {
                try {
                  id.host.callbacks.providerChanged(id.appWidgetId,p.info);
                }
 catch (                RemoteException ex) {
                  id.host.callbacks=null;
                }
              }
            }
            sendUpdateIntentLocked(p,appWidgetIds);
          }
        }
      }
    }
  }
  N=mInstalledProviders.size();
  for (int i=N - 1; i >= 0; i--) {
    Provider p=mInstalledProviders.get(i);
    if (pkgName.equals(p.info.provider.getPackageName()) && !keep.contains(p.info.provider.getClassName())) {
      removeProviderLocked(i,p);
    }
  }
}

Fixed version (ground truth):
void updateProvidersForPackageLocked(String pkgName){
  HashSet<String> keep=new HashSet<String>();
  Intent intent=new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
  intent.setPackage(pkgName);
  List<ResolveInfo> broadcastReceivers=mPackageManager.queryBroadcastReceivers(intent,PackageManager.GET_META_DATA);
  int N=broadcastReceivers == null ? 0 : broadcastReceivers.size();
  for (int i=0; i < N; i++) {
    ResolveInfo ri=broadcastReceivers.get(i);
    ActivityInfo ai=ri.activityInfo;
    if (pkgName.equals(ai.packageName)) {
      ComponentName component=new ComponentName(ai.packageName,ai.name);
      Provider p=lookupProviderLocked(component);
      if (p == null) {
        if (addProviderLocked(ri)) {
          keep.add(ai.name);
        }
      }
 else {
        Provider parsed=parseProviderInfoXml(component,ri);
        if (parsed != null) {
          keep.add(ai.name);
          p.info=parsed.info;
          final int M=p.instances.size();
          if (M > 0) {
            int[] appWidgetIds=getAppWidgetIds(p);
            cancelBroadcasts(p);
            registerForBroadcastsLocked(p,appWidgetIds);
            for (int j=0; j < M; j++) {
              AppWidgetId id=p.instances.get(j);
              id.views=null;
              if (id.host != null && id.host.callbacks != null) {
                try {
                  id.host.callbacks.providerChanged(id.appWidgetId,p.info);
                }
 catch (                RemoteException ex) {
                  id.host.callbacks=null;
                }
              }
            }
            sendUpdateIntentLocked(p,appWidgetIds);
          }
        }
      }
    }
  }
  N=mInstalledProviders.size();
  for (int i=N - 1; i >= 0; i--) {
    Provider p=mInstalledProviders.get(i);
    if (pkgName.equals(p.info.provider.getPackageName()) && !keep.contains(p.info.provider.getClassName())) {
      removeProviderLocked(i,p);
    }
  }
}