Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1230084368 (LWP 17931)]
osg::GraphicsContext::releaseContext (this=0x0)
    at /home/fugalh/src/OpenSceneGraph/src/osg/GraphicsContext.cpp:442
442         bool result = releaseContextImplementation();
(gdb) bt
#0  osg::GraphicsContext::releaseContext (this=0x0)
    at /home/fugalh/src/OpenSceneGraph/src/osg/GraphicsContext.cpp:442
#1  0xb7d9a0b5 in osgUtil::RenderStage::draw (this=0xac7cb78, 
    renderInfo=@0x86f388c, previous=@0xbfedce54)
    at /home/fugalh/src/OpenSceneGraph/src/osgUtil/RenderStage.cpp:854
#2  0xb7d927ce in osgUtil::RenderStage::drawPreRenderStages (this=0x8804d60, 
    renderInfo=@0x86f388c, previous=@0xbfedce54)
    at /home/fugalh/src/OpenSceneGraph/src/osgUtil/RenderStage.cpp:207
#3  0xb7da183c in osgUtil::SceneView::draw (this=0x86f3830)
    at /home/fugalh/src/OpenSceneGraph/src/osgUtil/SceneView.cpp:1331
#4  0x080686af in FGRenderer::update (refresh_camera_settings=true)
    at renderer.cxx:836
#5  0x08067212 in FGRenderer::update () at renderer.hxx:41
#6  0x080aa141 in GLUTdraw () at fg_os.cxx:128
#7  0xb7950066 in ?? () from /usr/lib/libglut.so.3
#8  0x086fed98 in ?? ()
#9  0x469f8a68 in ?? ()
#10 0x000d5b16 in ?? ()
#11 0xb796c100 in ?? () from /usr/lib/libglut.so.3
#12 0x086fed98 in ?? ()
#13 0x00002bc8 in ?? ()
#14 0xbfedd3a8 in ?? ()
#15 0x086fed98 in ?? ()
#16 0x086fed98 in ?? ()
#17 0xb7950fc2 in glutMainLoop () from /usr/lib/libglut.so.3
#18 0xb795335e in fgEnumWindows () from /usr/lib/libglut.so.3
#19 0xb79508c5 in glutMainLoopEvent () from /usr/lib/libglut.so.3
#20 0xb7950d55 in glutMainLoop () from /usr/lib/libglut.so.3
#21 0x0806526b in fgMainInit (argc=1, argv=0xbfedd6c4) at main.cxx:1071
#22 0x08061041 in main (argc=Cannot access memory at address 0x0
) at bootstrap.cxx:220