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Seg fault on (still?) #158

WilliamMayor opened this Issue Nov 7, 2013 · 5 comments


3 participants

WilliamMayor commented Nov 7, 2013

After running modulate() on an image, save() will cause a segmentation fault: 11.

OS: OS X 10.9
Python: 2.7.5
Wand: 0.3.5

This might be related to issue #150

Here's a Gist with a demo Python script that causes a seg fault on my machine:

I've also attached the image I'm using (just in case).



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dahlia commented Dec 6, 2013

@WilliamMayor does it still segfault even if you pass a file object to file= keyword instead of filename=? E.g.

from wand.image import Image

with Image(filename='image.gif') as img:
    with open('modulated.gif', 'wb') as f:

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WilliamMayor commented Dec 6, 2013

@dahlia Yes, the code I'm actually using calls the Image(blob=blob) constructor but I've now tried file= and filename= and I still see the seg fault when the modulate method is called.

EDIT. I just realised that the original issue states that the seg fault occurs on save(). Looking at it now, it seems to happen on modulate(), not sure where I got my wires crossed on that one.


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fungt commented Mar 31, 2014

any news on this issue? I can confirm the segfault for ImageMagick 6.8.8-9 and Wand 0.3.7 using mac osx 10.8.5. Tried with ImageMagick 6.7.x still got the same problem.

fungt added a commit to fungt/wand that referenced this issue Mar 31, 2014

dahlia added a commit that referenced this issue Apr 2, 2014

@dahlia dahlia added the bug label Apr 2, 2014


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dahlia commented Apr 2, 2014

@WilliamMayor Try out the latest version of 0.3-maintenance.

$ pip install git+

@dahlia dahlia closed this in 3ed28c8 Jun 24, 2014


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dahlia commented Aug 2, 2014

The bug is fixed in 0.3.8, a just released latest version.

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