Program: 25582
Project: 25582
Buggy source:
public List<TileCoordinates> localToWorld(final List<TileCoordinates> localCoordinatesList) throws IOException {
  LOG.info("String_Node_Str",localCoordinatesList.size());
  final ResolvedTileSpecCollection tiles=renderDataClient.getResolvedTiles(stack,z);
  final ProcessTimer timer=new ProcessTimer();
  final List<TileCoordinates> worldCoordinatesList=new ArrayList<>(localCoordinatesList.size());
  TileSpec tileSpec;
  TileCoordinates coordinates;
  String tileId;
  double[] local;
  int errorCount=0;
  for (int i=0; i < localCoordinatesList.size(); i++) {
    coordinates=localCoordinatesList.get(i);
    try {
      if (coordinates == null) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      tileId=coordinates.getTileId();
      if (tileId == null) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      local=coordinates.getLocal();
      if (local == null) {
        throw new IllegalArgumentException("String_Node_Str");
      }
 else       if (local.length < 2) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      tileSpec=tiles.getTileSpec(tileId);
      if (tileSpec == null) {
        throw new IllegalArgumentException("String_Node_Str" + tileId + "String_Node_Str"+ z+ "String_Node_Str"+ stack);
      }
      worldCoordinatesList.add(TileCoordinates.getWorldCoordinates(tileSpec,local[0],local[1]));
    }
 catch (    final Throwable t) {
      LOG.warn("String_Node_Str",i,t);
      errorCount++;
      if (coordinates == null) {
        coordinates=TileCoordinates.buildLocalInstance(null,null);
      }
      coordinates.setError(t.getMessage());
      worldCoordinatesList.add(coordinates);
    }
    if (timer.hasIntervalPassed()) {
      LOG.info("String_Node_Str",worldCoordinatesList.size(),localCoordinatesList.size());
    }
  }
  LOG.info("String_Node_Str",worldCoordinatesList.size(),errorCount,timer.getElapsedSeconds());
  return worldCoordinatesList;
}

Fixed version (ground truth):
public List<TileCoordinates> localToWorld(final List<TileCoordinates> localCoordinatesList,final ResolvedTileSpecCollection tiles) throws IOException {
  LOG.info("String_Node_Str",localCoordinatesList.size());
  final ProcessTimer timer=new ProcessTimer();
  final List<TileCoordinates> worldCoordinatesList=new ArrayList<>(localCoordinatesList.size());
  TileSpec tileSpec;
  TileCoordinates coordinates;
  String tileId;
  double[] local;
  int errorCount=0;
  for (int i=0; i < localCoordinatesList.size(); i++) {
    coordinates=localCoordinatesList.get(i);
    try {
      if (coordinates == null) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      tileId=coordinates.getTileId();
      if (tileId == null) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      local=coordinates.getLocal();
      if (local == null) {
        throw new IllegalArgumentException("String_Node_Str");
      }
 else       if (local.length < 2) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      tileSpec=tiles.getTileSpec(tileId);
      if (tileSpec == null) {
        throw new IllegalArgumentException("String_Node_Str" + tileId + "String_Node_Str"+ z+ "String_Node_Str"+ stack);
      }
      worldCoordinatesList.add(TileCoordinates.getWorldCoordinates(tileSpec,local[0],local[1]));
    }
 catch (    final Throwable t) {
      LOG.warn("String_Node_Str",i,t);
      errorCount++;
      if (coordinates == null) {
        coordinates=TileCoordinates.buildLocalInstance(null,null);
      }
      coordinates.setError(t.getMessage());
      worldCoordinatesList.add(coordinates);
    }
    if (timer.hasIntervalPassed()) {
      LOG.info("String_Node_Str",worldCoordinatesList.size(),localCoordinatesList.size());
    }
  }
  LOG.info("String_Node_Str",worldCoordinatesList.size(),errorCount,timer.getElapsedSeconds());
  return worldCoordinatesList;
}