[SciPy-user] extracting elements of a matrix using arrays as indices (SEGFAULT!)

Travis E. Oliphant oliphant@enthought....
Thu May 22 01:37:01 CDT 2008


Michael Hearne wrote:
> Thanks for the help - the method below works just fine in my real 
> application (which has nothing to do with setting elements of an array 
> to zero - that was just a simple example of something to _do_ with the 
> data being indexed).
>
> However, I am still concerned about the larger problem of getting a 
> segfault using ANY method of indexing an array.  If it is user error 
> that is causing the problem, then shouldn't I get an exception that 
> tells me my syntax is somehow incorrect?
>
> I've added SEGFAULT to the subject line in hopes that someone 
> responsible for the core NumPy code (Travis O., perhaps?) will take 
> notice and address the issue.  If that happens, once again, I'm happy 
> to help test on my version of NumPy wherever needed.
>
Thank you for finding this bug.   It is a bug due to over-flow 
calculations causing a loop not to terminate correctly (therefore 
walking over available memory).   It should be fixed in latest SVN 
version of NumPy.

-Travis




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