[Numpy-discussion] Crash using "reshape"...
sebastian at sipsolutions.net
Wed Nov 21 09:42:17 EST 2012
On Wed, 2012-11-21 at 01:12 -0800, Terry J. Ligocki wrote:
> I am having a problem with "reshape" crashing:
> > python
> Python 2.6.4 (r264:75706, Jan 16 2010, 21:11:47)
> [GCC 4.3.2] on linux2
> Type "help", "copyright", "credits" or "license" for more
> >>> import numpy
> >>> numpy.version.version
> >>> npData = numpy.ones([701,701,7899],dtype=numpy.dtype('b'))
> >>> npDataSubset =
> >>> npDataOutput =
> Segmentation fault
> If I change the "5000" to a "4000", everything is fine. I'm not
> running out of memory - my system had 48 GB of memory and nothing else
> is using a significant portion of this memory.
> Note: 700x700x4000 = 1,960,000,000 < 2^31 and 700x700x5000 =
> 2450000000 > 2^31. I suspect somewhere in the underlying code there
> is a signed 32-bit integer being used for an index/pointer offset
> (this is running on a 64-bit machine).
yes, int is used for npy_intp in one occasione. I have created a PR that
fixes the issue:
> I did some searching of the archives and didn't find a match for this
> problem. Thank you for any and all help!
> Terry J. (Ligocki, tjligocki at lbl.gov)
> When you wish upon a falling star, your dreams can come true.
> Unless it's really a meteorite hurtling to the Earth which will
> destroy all life.
> Then you're pretty much hosed no matter what you wish for.
> Unless it's death by meteor.
> (Despair, Inc.)
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