Red Hat Bugzilla – Bug 603818
Converting image to Scipy array causes segfault
Last modified: 2011-06-27 14:13:17 EDT
Created attachment 423887 [details]
Image that crashes Scipy
Attached is a simple file that segfaults Python when it is read with PIL and then converted to a Scipy array.
Here's a log of an interactive session that shows you how to replicate the bug.
localhost 18:28 0 > python
Python 2.6.4 (r264:75706, Apr 1 2010, 02:56:02)
[GCC 4.4.3 20100226 (Red Hat 4.4.3-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import Image, scipy
>>> image = Image.open('scipy_crash.png')
>>> arr = scipy.asarray(image)
zsh: segmentation fault (core dumped) python
Other images of the same type survive the last command. You can crash them by continuing with e.g. these commands:
from scipy import fftpack
x = fftpack.fft2(arr)
The probable reason for this crash is that the image is a PNG bitmap. When it is converted to a Scipy array the result is a Scipy array of booleans, not numbers. Somehow this causes a crash.
I have filed this against Scipy, but naturally the bug can also be in Numpy or PIL.
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