Program: 91977
Project: 91977
Buggy source:
/** 
 * Returns the grid of the given name. This method returns the cached instance if it still exists, or load the grid otherwise.
 * @param file      Name of the datum shift grid file to load.
 * @param averages  An "average" value for the offset in each dimension, or {@code null} if unknown.
 * @param scale     The factor by which to multiply each compressed value before to add to the average value.
 */
static DatumShiftGridFile<Angle,Length> getOrLoad(final Path file,final double[] averages,final double scale) throws FactoryException {
  final Path resolved=DataDirectory.DATUM_CHANGES.resolve(file).toAbsolutePath();
  DatumShiftGridFile<?,?> grid=DatumShiftGridFile.CACHE.peek(resolved);
  if (grid == null) {
    final Cache.Handler<DatumShiftGridFile<?,?>> handler=DatumShiftGridFile.CACHE.lock(resolved);
    try {
      grid=handler.peek();
      if (grid == null) {
        try (final BufferedReader in=Files.newBufferedReader(resolved)){
          DatumShiftGridLoader.log(FranceGeocentricInterpolation.class,file);
          final DatumShiftGridFile.Float<Angle,Length> g=load(in,file);
          grid=DatumShiftGridCompressed.compress(g,averages,scale);
        }
 catch (        IOException|NoninvertibleTransformException|RuntimeException e) {
          throw new FactoryException(Errors.format(Errors.Keys.CanNotParseFile_2,HEADER,file),e);
        }
        grid=grid.useSharedData();
      }
    }
  finally {
      handler.putAndUnlock(grid);
    }
  }
  return grid.castTo(Angle.class,Length.class);
}

Fixed version (ground truth):
/** 
 * Returns the grid of the given name. This method returns the cached instance if it still exists, or load the grid otherwise.
 * @param file      Name of the datum shift grid file to load.
 * @param averages  An "average" value for the offset in each dimension, or {@code null} if unknown.
 * @param scale     The factor by which to multiply each compressed value before to add to the average value.
 */
@SuppressWarnings("String_Node_Str") static DatumShiftGridFile<Angle,Length> getOrLoad(final Path file,final double[] averages,final double scale) throws FactoryException {
  final Path resolved=DataDirectory.DATUM_CHANGES.resolve(file).toAbsolutePath();
  DatumShiftGridFile<?,?> grid=DatumShiftGridFile.CACHE.peek(resolved);
  if (grid == null) {
    final Cache.Handler<DatumShiftGridFile<?,?>> handler=DatumShiftGridFile.CACHE.lock(resolved);
    try {
      grid=handler.peek();
      if (grid == null) {
        try (final BufferedReader in=Files.newBufferedReader(resolved)){
          DatumShiftGridLoader.log(FranceGeocentricInterpolation.class,file);
          final DatumShiftGridFile.Float<Angle,Length> g=load(in,file);
          grid=DatumShiftGridCompressed.compress(g,averages,scale);
        }
 catch (        IOException|NoninvertibleTransformException|RuntimeException e) {
          final String message=Errors.format(Errors.Keys.CanNotParseFile_2,HEADER,file);
          if (e instanceof NoSuchFileException) {
            throw new MissingFactoryResourceException(message,e);
          }
 else {
            throw new FactoryDataException(message,e);
          }
        }
        grid=grid.useSharedData();
      }
    }
  finally {
      handler.putAndUnlock(grid);
    }
  }
  return grid.castTo(Angle.class,Length.class);
}