[CMake] Random BAD_COMMAND error when running CTest

[David Cole]

Another common source of apparently random results is uninitialized
variables. I don't think it is in ctest itself, as this is the first we've
heard of something like this on this mailing list (although anything's
possible...)
Have you run your test code through valgrind to see if it catches any
uninitialized data access?


David


On Fri, Oct 17, 2008 at 11:37 PM, Ian Mackenzie
<ian.e.mackenzie at gmail.com>wrote:

> On Fri, Oct 17, 2008 at 10:09 PM, Alan W. Irwin
> <irwin at beluga.phys.uvic.ca> wrote:
> > One potential source of randomness is failing or iffy hardware.
> >
> > Have you kept track of such things as systematic changes in system
> > temperature under the same load conditions? I must clean out the dust
> from
> > one of my boxes every 6 months or I see dramatically increasing
> temperatures
> > (like 10 C) under heavy system load.  The other box has much better air
> flow
> > design so the the problem isn't as critical there.
> >
> > Have you tried running memtest?
> >
> > What happens if you try running your ctests on an entirely different
> > machine?
>
> Thanks for the suggestions!  I don't think system temperature has much
> to do with it, though - I did a bunch more tests keeping track of
> temperature at the same time (acpi -t && ctest) and there didn't seem
> to be a correlation between temperature and errors...both cores were
> pretty steady around 56-57 C.  I also just ran memtest, which reported
> no errors.
>
> I don't have a convenient way of testing on another machine right now;
> while I suspect the problem is somehow dependent on my machine and
> might very well not show up on another, the errors also seemed to
> start cropping up as soon as I upgraded to 2.6.2, so I think it's
> somehow related to CMake. It might just be a packaging thing with my
> distribution, but I tried with the binary version of CMake available
> on the CMake web site as well and I get the same sort of errors (even
> after wiping the build directory clean and rebuilding everything with
> the binary version of CMake and then testing with the binary version
> of CTest).
>
> -Ian
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