[Numpy-discussion] numpy.linalg.qr bug on 64-bit platforms

Nils Wagner nwagner@iam.uni-stuttgart...
Mon Mar 5 06:08:43 CST 2007


Steffen Loeck wrote:
> Fernando Perez wrote:
>   
>> I recently got a report of a bug triggered only on 64-bit hardware,
>> and on a machine (in case it's relevant) that runs python 2.5.  This
>> is with current numpy SVN which I just rebuilt a moment ago to
>> triple-check:
>>
>> In [3]: a = numpy.array([[1.0,2],[3,4]])
>>
>> In [4]: numpy.linalg.qr(a)
>>  ** On entry to DGEQRF parameter number  2 had an illegal value
>> sage[~]>  # dumped back at system prompt
>>     
>
> Has there been any progress in solving this problem? I get the same error 
> message and have no idea how to solve it.
>
> Regards, Steffen
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>   
Confirmed with

Python 2.4.1 (#1, Oct 13 2006, 16:51:58)
[GCC 4.0.2 20050901 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> numpy.__version__
'1.0.2.dev3571'
>>> a = numpy.array([[1.0,2],[3,4]])
>>> numpy.linalg.qr(a)
 ** On entry to DGEQRF parameter number  2 had an illegal value
 
Nils




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