On Friday 09 April 2004 01:47, Andy Ross wrote:
> Durk Talsma wrote:
> > It looks like the crash is somewhere inside the AIMgr (judging from
> > stackdump item #15), but since I'm still incredably unfamiliar with this
> > part of the code, this might just be a wild guess.
> >
> > Anyways, I hope that this is useful debug information. Can others
> > confirm this?
>
> The 0xdeadbeef assertion failure in ssg is almost certainly memory
> corruption.  Other typical symptoms are heap corruption, which is what
> seems to be happening here (the crash happens under operator
> new).  There's no particular reason to suspect the AIMgr in
> particular, it was just unlucky enough to be the first to traverse the
> broken ssg node.
>
> This kind of bug is really hard to track down.  Valgrind helps, but it
> would take *days* to get to where you are seeing the crash.
> Basically, you end up having to search the configuration space:
>
> + What was the last version that worked?
> + Does turning off threads fix the problem?
> + [Ditto for any other configuration choices you have made]
> + How about changing plib versions?
>
> Some things can be ruled out already: since this is a YASim aircraft,
> JSBSim is off the hook.  Likewise, the 747 has no 2D panel, etc...
>
> Andy

It can also occur where the a/c has no 3D panel but just 2D panels, which I'd 
interpret as ruling out both types of panel.

I first reported this on 02-April and had updated from cvs two days prior to 
mentioning the problem.  I think the last update I'd done before that was 
about two weeks earlier.

LeeE

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