Cannot read TIFF file

[gabdube]

What did you do?

Generated cubemaps in a .TIFF format
Tried to read the output with Pillow

What did you expect to happen?

I expected to be able to read the file.

What actually happened?

Got a ValueError: seek of closed file. See my code sample just below.

What are your OS, Python and Pillow versions?

• OS: Linux / Ubuntu 18.04.1 LTS
• Python: 3.7.1
• Pillow: 5.4.0

Other notes

• I have libtiff installed
• I have tried to open a reference file from https://www.fileformat.info/format/tiff/sample/index.htm and it works fine (its included in the zip)
• I have the same error when reading non layered file (original_panorama.tif in the zip)

>>> from PIL import Image
>>> Image.open('irr_cubemap.tiff')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/gab/.pyenv/versions/3.7.1/lib/python3.7/site-packages/PIL/Image.py", line 2672, in open
    im = _open_core(fp, filename, prefix)
  File "/home/gab/.pyenv/versions/3.7.1/lib/python3.7/site-packages/PIL/Image.py", line 2657, in _open_core
    fp.seek(0)
ValueError: seek of closed file

Files:
tmp.zip

[cgohlke]

I don't think PIL can handle float32 RGB images.

Besides that, it seems the TiffImagePlugin closes file handles that it does not own.

[radarhere]

The ValueError: seek of closed file error has now been fixed in #3540.

[radarhere]

Are you happy for the rest of this to be considered part of #1888, and for this issue to be closed?

[gabdube]

@radarhere No problem.