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Let's hunt the oldest bug!



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Hello,

Bug #740 is the oldest open bug report in the Debian archive.
We have two options:

1) Leave it there, as a symbol of the eternity of our Bug Tracking System, or
2) Hunt it, localize it, fix it.

Although 1) is very tempting, I thought we could at least try to find a
reliable way to reproduce the bug, so we can forward it upstream.

Background information:

Some people report that xclock leaves "droppings" in the window, this
means, the handles are not deleted correctly, some pixel remain.

Possible causes of the problem:

XClock callls XDrawLines() and XFillPolygon() to update the handles twice,
both times with the very same arguments, so the bug seems to be hidden in
the X libraries and/or servers or even in the FPU unit of the processor.

If anyone does find droppings, please supply relevant information like:
- which version of the xbase and xlib6/xlib6g packages you use
- which Xserver you use (name and version)
- how the Xserver is configured in /etc/X11/XF86Config (FastRam activated? etc)
- which video card you have and how fast the memory is (70 or 60ns?)
- which kernel you are using (self-compiled or Debian, FPU emulation?)
- which libc version have
- which kind of CPU you have (as detailed as possible, because this 'bug'
  could be caused by FPU errors)
- the exact command you start xclock with, including all parameters and
  switches
- versions of other important things I probably have forgotten


+-----------------------------------------------------------------------+
| Please run the attached `fastclock' binary, it is an `optimized'      |
| version of xclock, which runs about 60 times faster than the original.|
| As I have never seen droppings, I can't tell you how long you have to |
| run the program. If you see artifacts, please submit the information  |
| above to 740@bugs.debian.org                                          |
+-----------------------------------------------------------------------+

Thank you for your help,
Marcus


-- 
"Rhubarb is no Egyptian god."        Debian GNU/Linux        finger brinkmd@ 
Marcus Brinkmann                   http://www.debian.org    master.debian.org
Marcus.Brinkmann@ruhr-uni-bochum.de                        for public  PGP Key
http://homepage.ruhr-uni-bochum.de/Marcus.Brinkmann/       PGP Key ID 36E7CD09

Attachment: fastclock
Description: Binary data


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