On Monday 09 March 2009 07:29:47 Durk Talsma wrote:
> Hi Geoff,
>
> On Sunday 08 March 2009 20:56:52 Geoff McLane wrote:
> > Yep!
> >
> > Tried ...
> > --aircraft=CitationX --airport=CYOW --runway=25 --fg-scenery=
> > $HOME/Scenery-1.0.1
>
> Thanks for you report. Good to know, I'm not the only one, at that adds to
> the robustness of the crash. I think it's too early to draw any firm
> conclusions, but my impression is that it's more than just the code on
> mk_viii that is blowing. The only thing I tentatively conclude is that at
> this location something is going terribly wrong in updating FlightGear's
> position, as judged by:
>
> - The position string sent to terrasync
> - Local time being NaN (zapping to a non-existent time zone?)
> - A host of Culling errors. (position so far away that depth becomes NaN)?
>
> Next step is to check whether other aircraft produce the same crash, and
> whether the FDM (i.e. non-yasim) aircraft produce the same problem.
>
Okay, just to follow-up: I've done some additional testing:
- The c172, and the Seneca (both jsbsim) don't seem to crash, although I need
to test this a little further.
- The CitationX and the 777-200ER (both yasim) cause the segfault.
- There's a VOR station located exactly 100.0nm from the startup position. If
you fly straight to this VOR station (it's at the default NAV1 frequency), by
following radial 108, FlightGear already crashes after approx 5 minutes.
- Using FlightGear 1.9.0, in combination with the current base package does
not crash.
So, my suspicion is that a relatively new code change, is affecting yasim
aircraft, but not JSBsim.
I will try to checkout earlier versions of FlightGear, and step through
various versions of the code to see where things go wrong. If anybody would
like to help, please be my guest.
Cheers,
Durk
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