3.2.0 DIB saving on Windows fails "image file is truncated" error

What did you do?

1 open mspaint
2 alt+prtscr
3 run the code

#!/usr/bin/env python

import os, sys
from PIL import ImageGrab

im = ImageGrab.grabclipboard()

if im is None:
  sys.exit('Error: No image data in clipboard')

im.show()

What did you expect to happen?

The image from clipboard is shown on the screen:

What actually happened?

Traceback (most recent call last):
  File "savebmp.py", line 13, in <module>
    im.show()
  File "C:\Python27\lib\site-packages\PIL\Image.py", line 1730, in show
    _show(self, title=title, command=command)
  File "C:\Python27\lib\site-packages\PIL\Image.py", line 2480, in _show
    _showxv(image, **options)
  File "C:\Python27\lib\site-packages\PIL\Image.py", line 2485, in _showxv
    ImageShow.show(image, title, **options)
  File "C:\Python27\lib\site-packages\PIL\ImageShow.py", line 51, in show
    if viewer.show(image, title=title, **options):
  File "C:\Python27\lib\site-packages\PIL\ImageShow.py", line 75, in show
    image = image.convert(base)
  File "C:\Python27\lib\site-packages\PIL\Image.py", line 846, in convert
    self.load()
  File "C:\Python27\lib\site-packages\PIL\ImageFile.py", line 218, in load
    "(%d bytes not processed)" % len(b))
IOError: image file is truncated (1312 bytes not processed)

What versions of Pillow and Python are you using?

Python 2.7, Pillow 3.2.0

With same Python/Pillow on Win7, I get a similar result when running the code as a script.

Edit: also get similar result in IDLE.

@hugovk

@hugovk im == None can only be shown in one case - when you don't have any data in clipboard. Otherwise you should get Traceback.

@techtonik

@techtonik Yes, see my edit. (I'd run the test incorrectly.)

@artscoop

/cc @artscoop - do you know why it thinks the image file is truncated? Here is the image __dict__:

{
    'info': {'compression': 3, 'dpi': (0, 0)},
    'category': 0,
    'palette': None,
    'pyaccess': None,
    'decoderconfig': (),
    'filename': None,
    'fp': < _io.BytesIO object at 0x023397E0 > ,
    'readonly': 1,
    'im': None,
    'mode': 'RGBA',
    'decodermaxblock': 65536,
    'tile': [
      ('raw', (0, 0, 329, 423), 56L, ('BGRA', 1316, -1)),
    ],
    'size': (329, 423),
}

PR #1813 is merged, so this should be fixed too.

In https://ci.appveyor.com/project/techtonik/pillow/build/3.3.pre.11/artifacts wheel I am not getting the image file is truncated message anymore.

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3.2.0 DIB saving on Windows fails "image file is truncated" error #1810

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3.2.0 DIB saving on Windows fails "image file is truncated" error #1810

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What did you do?

What did you expect to happen?

What actually happened?

What versions of Pillow and Python are you using?

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hugovk commented on Apr 6, 2016

techtonik commented on Apr 6, 2016

hugovk commented on Apr 6, 2016

techtonik commented on Apr 6, 2016

hugovk commented on Apr 6, 2016

techtonik commented on Apr 7, 2016

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