At 10/23/02, John Check wrote:
I just ran through firing up all the non 172 planes
and there are several JSBsim planes that segfault

x24b
X15
Shuttle
I have been down this road before. These planes are crashing for some reason, and the segfault is not the first thing that happens.

This segfault is very different and probably simply FDM related.

It seems that a big clue w/ my segfault is that it happens "right out of the box", i.e. immediately.


On Wednesday 23 October 2002 10:30 pm, Tony Peden wrote:
> On Wed, 2002-10-23 at 19:14, Michael Selig wrote:
> > At 10/23/02, Tony Peden wrote:
> > >On Wed, 2002-10-23 at 17:39, Michael Selig wrote:
> > > > I am trying to compile and run the latest version of fgfs, but I have
> > > > hit a problem.  When I run it I promptly get the error message
> > > > "Segmentation Fault"
> > > > There are no other messages.
> > > >
> > > > What I have:
> > > > - Redhat 7.1
> > > > - automake 1.6.3
> > > > - autoconf 2.53
> > > > - plib 1.6.0
> > > > - yesterday's cvs of Simgear, fgfsbase, Flightgear (0.9)
> > > >
> > > > I am able to compile and run my older version of fgfs (from
> > > > 8/20/2002) w/ the new plib and Simgear.
> > > >
> > > > Also, we're able to compile and run the new setup on some other
> > > > Redhat machines.
> > > >
> > > > So this does seem to be machine specific, but I have not changed
> > > > anything at the system level.
> > > >
> > > > Anyone have any ideas on what I could try next?
> > >
> > >It may help to know where it's crashing.
> > >
> > >run fgfs with this:
> > >gdb fgfs
> > >type run at the gdb prompt then, when it crashes, type bt and post the
> > >results.
> >
> > Here's what I get:
> >
> > ~/www-flightgear-org> gdb ./FlightGear/src/Main/fgfs
> > GNU gdb 5.0rh-5 Red Hat Linux 7.1
> > Copyright 2001 Free Software Foundation, Inc.
> > GDB is free software, covered by the GNU General Public License, and you
> > are welcome to change it and/or distribute copies of it under certain
> > conditions. Type "show copying" to see the conditions.
> > There is absolutely no warranty for GDB.  Type "show warranty" for
> > details. This GDB was configured as "i386-redhat-linux"...
> > (gdb) run
> > Starting program:
> > /home/m-seligSim/www-flightgear-org/./FlightGear/src/Main/fgfs
> > [New Thread 1024 (LWP 21926)]
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 1024 (LWP 21926)]
> > __strtol_internal (nptr=0x8833618 "", endptr=0x85ccee0, base=139597448,
> >      group=1065353216) at eval.c:36
> > 36      eval.c: No such file or directory.
> >          in eval.c
> > (gdb) bt
> > #0  __strtol_internal (nptr=0x8833618 "", endptr=0x85ccee0,
> > base=139597448, group=1065353216) at eval.c:36
> > #1  0x0834b82a in SkyTextureState::SkyTextureState (this=0x8833618)
> >      at SkyTextureState.cpp:47
> > #2  0x08348a5f in SkyMaterial::SkyMaterial (this=0x8833578) at
> > SkyMaterial.cpp:60
> > #3  0x08348223 in SkyLight::SkyLight (this=0x8833500,
> > eType=SKY_LIGHT_DIRECTIONAL)
> >      at SkyLight.cpp:67
> > #4  0x08346ce6 in __static_initialization_and_destruction_0
> > (__initialize_p=1, __priority=65535) at
> > /usr/include/g++-3/stl_multimap.h:52
> > #5  0x08346d8e in global constructors keyed to eType ()
> >      at /usr/include/g++-3/stl_multimap.h:75
> > #6  0x083fb895 in __do_global_ctors_aux () at slMODfile.cxx:686
> > #7  0x0804e0ae in _init () at eval.c:41
> > #8  0x40317161 in __libc_start_main (main=0x80573ec <main>, argc=1,
> > ubp_av=0xbffff8ec,
> >      init=0x804e098 <_init>, fini=0x8450e80 <_fini>, rtld_fini=0x4000e184
> > <_dl_fini>,
> >      stack_end=0xbffff8dc) at ../sysdeps/generic/libc-start.c:122
> >
> > FWIW I have done things like:
> > - uninstall SimGear and plib, and reinstalled.
> > - I have done a cvs co from our uiuc "mirror" and a cvs update -dP from
> > the fgfs site.  I get the same segfault w/ both versions of the code. -
> > As compared w/ the last version that worked, there has been a bunch of
> > new 3D cloud work and runway lighting (I think).
> > - I also installed metakit from the tarball in SimGear/src-lib, but I
> > speculate that I did not really need to do that.
> > - Through all of these gyrations, my version from 8/20/02 still compiles
> > and runs w/ the new SimGear and plib.
>
> Hmm, this looks like its in the 3D clouds code ... you might try running
> with it disabled using: --disable-clouds3d
> Beyond that, I'm not going to be much help.
>
> > Regards,
> > Michael
> >
> > > > Regards,
> > > > Michael
> > > >
> > > >
> > > > _______________________________________________
> > > > Flightgear-devel mailing list
> > > > [EMAIL PROTECTED]
> > > > http://mail.flightgear.org/mailman/listinfo/flightgear-devel
> > >
> > >--
> > >Tony Peden
> > >[EMAIL PROTECTED]
> > >We all know Linux is great ... it does infinite loops in 5 seconds.
> > >-- attributed to Linus Torvalds
> > >
> > >
> > >_______________________________________________
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> > >http://mail.flightgear.org/mailman/listinfo/flightgear-devel
> >
> > _______________________________________________
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> > [EMAIL PROTECTED]
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 Prof. Michael S. Selig
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 University of Illinois at Urbana-Champaign
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