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MathGroup Archive 2002

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Best possible help to the developers

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33884] Best possible help to the developers
  • From: Vladimir Bondarenko <vvb at mail.strace.net>
  • Date: Sun, 21 Apr 2002 06:12:39 -0400 (EDT)
  • Reply-to: Vladimir Bondarenko <vvb at mail.strace.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Having carefully investigated Versions 2.2, 3.0, 4.0, and 4.1
I came to the conclusion that many problems propagate along
several versions. Also, rather often they disappear, and then
resurface.

Might it help to the developers to fix the bug (or to help them
in any other way) if I would also name the concrete version where
the bug appeared for the first time? Save them some time?

Say, kinda the following:

...............................................................................

BUG # 101       Integrate: INVALID PAGE FAULT/0167:64607028  BuildNumber=156656

Bug Presence Table:

                YES  4.1 for Microsoft Windows (November 2, 2000)
                YES  4.0 for Microsoft Windows (April 21, 1999)
                YES  Microsoft Windows 3.0 (April 25, 1997)
                NO   Windows 387 2.2 (April 9, 1993)

BuildNumber     156656
CPU ID          AuthenticAMD AMD Athlon(tm) XP 1600+ 
RAM size        512 Mb
Free HDD size   11  Gb
OS ID           Microsoft Windows 98 4.10.2222 A 

After about 2 seconds while Mathematica 4.1 is the single running task
MATHKERNEL caused an invalid page fault in module MATHDLL.DLL at 0167:64607028

Integrate[(Sqrt[1 + z^3] Log[z])/(1 - (-z)^(1/3)), {z, 0, 1}]

The same problem with

Integrate[(Sqrt[1 + z^3] Log[z])/(1 - (-z)^(1/4)), {z, 0, 1}]
Integrate[(Sqrt[1 + z^3] Log[z])/(1 - (-z)^(1/5)), {z, 0, 1}]
Integrate[(Sqrt[1 + z^3] Log[z])/(1 - (-z)^(-1/3)), {z, 0, 1}]
Integrate[(Sqrt[1 + z^3] Log[z])/(1 - (-z)^(-1/4)), {z, 0, 1}]
Integrate[(Sqrt[1 + z^3] Log[z])/(1 - (-z)^(-1/5)), {z, 0, 1}]

..............................................................................

Or, to name the versions is not very helpful?

(Actually, this version localization might take a tangible amount of time.)


Vladimir Bondarenko




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