[IronPython] Bug of big integer manipulation

[HEMMI, Shigeru]

Thanks for the answer.

I was able to take a log with  -X:ExceptionDetail, but since Japanese,
log file includes Japanse characters; I removed them by hand. I was
not able to which numbers were involved. The log file is attached.

Please note that there are two problems; one is "ValueError: value too
big" problem which we do not encounter with CPython. The other is an
infinite loop bug.

Please also note that NZMATH is pure python, having simple module
structure and we will be able to duplicate the problem if you download
it.

Best regards,

2006/8/10, Martin Maly <Martin.Maly at microsoft.com>:
> By any chance, were you able to determine which operation caused the exception and which numbers were involved? What would help me find out what the problem is faster would be get a call stack (for that, could you please run your repro with -X:ExceptionDetail switch? Then ideally if you could find out what the big integer numbers were with which the operation failed, that would be ideal.
>
> Thanks!
> Martin
>
> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of HEMMI, Shigeru
> Sent: Tuesday, August 08, 2006 4:31 PM
> To: Discussion of IronPython
> Subject: [IronPython] Bug of big integer manipulation
>
> Hello,
>
> NZMATH is a Python based number theory oriented calculation system developed by Tokyo Metropolitan University. The URL is http://tnt.math.metro-u.ac.jp/nzmath/.
>
> Using NZMATH, I encounterd a bug of big integer manipulation.
>
> IronPython
> ============================
> C:\IronPython-2604>ipy
> IronPython 1.0.2411 on .NET 2.0.50727.42 Copyright (c) Microsoft Corporation. All rights reserved.
> >>> import sys
> >>> sys.path.append(r'C:\Python24\Lib')
> >>> sys.path.append(r'C:\Python24\Lib\site-packages')
> >>> from nzmath import prime
> >>> prime.nextPrime(256)
> 257
> >>> nx = sys.maxint
> >>> prime.nextPrime(nx*nx)
> Traceback (most recent call last):
>   File , line 0, in <stdin>##115
>   File C:\Python24\Lib\site-packages\nzmath\prime.py, line 158, in nextPrime
>   File C:\Python24\Lib\site-packages\nzmath\prime.py, line 206, in primeq
>   File C:\Python24\Lib\site-packages\nzmath\prime.py, line 188, in smallSpsp
>   File C:\Python24\Lib\site-packages\nzmath\prime.py, line 41, in spsp
> ValueError: value too big
> >>> prime.nextPrime(nx)  ## Seems going into infinite loop.
>
> CPython
> ============================
> C:\IronPython-2604>python
> Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information.
> >>> import sys
> >>> from nzmath import prime
> >>> nx = sys.maxint
> >>> prime.nextPrime(nx*nx)
> 4611686014132420667L
> >>> prime.nextPrime(nx)
> 2147483659L
> >>>
>
> Regards,
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