Having been hit once more by this bug, I upgraded libopenscenegraph100 to 3.2.1-5 from unstable but the bug struck again at --airport=UAOL.
Program received signal SIGSEGV, Segmentation fault. 0x0000000000000000 in ?? () (gdb) bt #0 0x0000000000000000 in ?? () #1 0x0000000000babf47 in osgUtil::UpdateVisitor::apply(osg::Geode&) () #2 0x00007ffff70ab210 in simgear::EffectGeode::accept (this=0x7fffb037fc50, nv=...) at /home/markus/pkg-flightgear/simgear.git/simgear/scene/material/EffectGeode.hxx:32 #3 0x00007ffff52573b3 in osg::Sequence::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #4 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #5 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #6 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #7 0x0000000000bade9d in SGUpdateVisitor::apply(osg::Transform&) () #8 0x00007ffff7113fa3 in SGOffsetTransform::accept (this=0x7fffb0083f80, nv=...) at /home/markus/pkg-flightgear/simgear.git/simgear/scene/model/SGOffsetTransform.hxx:33 #9 0x00007ffff52213ba in osg::LOD::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #10 0x00007ffff5221a73 in osg::LOD::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #11 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #12 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #13 0x00007ffff523e3a5 in osg::PagedLOD::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #14 0x0000000000bae4a9 in SGUpdateVisitor::apply(osg::PagedLOD&) () #15 0x00007ffff523f183 in osg::PagedLOD::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #16 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #17 0x0000000000bade9d in SGUpdateVisitor::apply(osg::Transform&) () #18 0x00007ffff717d633 in osg::MatrixTransform::accept (this=0x7fffbe8b50b0, nv=...) at /usr/include/osg/MatrixTransform:37 #19 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #20 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #21 0x00007ffff523e3a5 in osg::PagedLOD::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #22 0x0000000000bae4a9 in SGUpdateVisitor::apply(osg::PagedLOD&) () #23 0x00007ffff523f183 in osg::PagedLOD::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #24 0x00007ffff52213ba in osg::LOD::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #25 0x00007ffff5221a73 in osg::LOD::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #26 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #27 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #28 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #29 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #30 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #31 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #32 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #33 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #34 0x00007ffff52941c1 in osg::Switch::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #35 0x00007ffff5294813 in osg::Switch::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #36 0x00007ffff51ef413 in osg::Group::traverse(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosg.so.100 #37 0x00007ffff5ed8910 in osg::Group::accept(osg::NodeVisitor&) () from /usr/lib/x86_64-linux-gnu/libosgFX.so.100 #38 0x00007ffff5899507 in osgViewer::Viewer::updateTraversal() () from /usr/lib/x86_64-linux-gnu/libosgViewer.so.100 #39 0x00007ffff589bc35 in osgViewer::ViewerBase::frame(double) () from /usr/lib/x86_64-linux-gnu/libosgViewer.so.100 #40 0x0000000000b98f9a in fgOSMainLoop() () #41 0x00000000005f94ee in fgMainInit(int, char**) () #42 0x00000000005a00ff in main () I am running the following packages: ii flightgear 3.0.0-4~test1 amd64 Flight Gear Flight Simulator ii flightgear-data-ai 3.0.0-1 all FlightGear Flight Simulator -- standard AI data ii flightgear-data-aircrafts 3.0.0-1 all FlightGear Flight Simulator -- standard aircraft ii flightgear-data-all 3.0.0-1 all FlightGear Flight Simulator - virtual package ii flightgear-data-base 3.0.0-1 all FlightGear Flight Simulator -- base files ii flightgear-data-models 3.0.0-1 all FlightGear Flight Simulator -- standard models ii libopenscenegraph100:amd64 3.2.1-5 amd64 3D scene graph, shared libs ii libsimgearcore3.0.0:amd64 3.0.0-6 amd64 Simulator Construction Gear -- core library ii libsimgearcore3.0.0-dbg:amd64 3.0.0-6 amd64 debugging symbols for libsimgearcore ii libsimgearscene3.0.0:amd64 3.0.0-6 amd64 Simulator Construction Gear -- scene library ii libsimgearscene3.0.0-dbg:amd64 3.0.0-6 amd64 debugging symbols for libsimgearscene Is it necessary to recompile flightgear in order to benefit from the bug fix? -- Ludovic Brenta. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". 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