Segmentation fault when writing numpy array to exr in Python

Question

I'm using OpenEXR to write an exr image of size (256, 256) to a display window of (896, 1280). However, I get the error of Segmentation Fault:

I've already increased the stack memory using ulimit -s 32768. It's been a few hours now and I can't find the solution. Here is my code:

channel_names ] ['R', 'G', 'B']
header = openexr.Header(img.shape[1], img.shape[0])
  try:
    exr_channel_type = Imath.PixelType(_np_to_exr[values.dtype.type])
  except KeyError:
    raise TypeError('Unsupported numpy type: %s' % str(values.dtype))
  header['channels'] = {
      n: Imath.Channel(exr_channel_type) for n in channel_names
  }

  min_and_max_points = Imath.Box2i((0, 0), (dw_height, dw_width))
  # header['dataWindow'] = min_and_max_points
  header['displayWindow'] = min_and_max_points
  print(header)

  channel_data = [values[..., i] for i in range(values.shape[-1])]
  exr = openexr.OutputFile(filename, header)
  exr.writePixels(
      dict((n, d.tobytes()) for n, d in zip(channel_names, channel_data)))
  exr.close()