[osg-users] How to debug this SIGSEGV

[OpenSceneGraph Users]

Hello! I am totally at a loss and I hope someone can help me. I've got a 
Gtk application running on Ubuntu that uses osgGtk to display the scene. 
The crash does not happen every time I do the same operation, only 
sometimes. As you can see, the crash is in libosg. I guess that I'm doing 
something wrong in an Osg call somewhere and the crash is just happening 
asynchronously? Either way I have absolutely no idea how to approach fixing 
this crash. Please help me! Here's a typical backtrace. Does anyone have 
any ideas? Thank you all so much in advance!

- Erik

#0  0x00007fffd2e90eea in ?? () from 
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#1  0x00007fffd2d2f5e0 in ?? () from 
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#2  0x00007fffd2e9ddb0 in ?? () from 
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#3  0x00007ffff55af488 in 
osg::Geometry::drawImplementation(osg::RenderInfo&) const () from 
/usr/lib/x86_64-linux-gnu/libosg.so.100
#4  0x00007ffff47d1380 in osgUtil::RenderLeaf::render(osg::RenderInfo&, 
osgUtil::RenderLeaf*) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#5  0x00007ffff47cb695 in 
osgUtil::RenderBin::drawImplementation(osg::RenderInfo&, 
osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#6  0x00007ffff47cb6d4 in 
osgUtil::RenderBin::drawImplementation(osg::RenderInfo&, 
osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#7  0x00007ffff47d6ed7 in 
osgUtil::RenderStage::drawImplementation(osg::RenderInfo&, 
osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#8  0x00007ffff47d5cd2 in osgUtil::RenderStage::drawInner(osg::RenderInfo&, 
osgUtil::RenderLeaf*&, bool&) () from 
/usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#9  0x00007ffff47d7c7f in osgUtil::RenderStage::draw(osg::RenderInfo&, 
osgUtil::RenderLeaf*&) () from /usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#10 0x00007ffff47dfdb7 in osgUtil::SceneView::draw() () from 
/usr/lib/x86_64-linux-gnu/libosgUtil.so.100
#11 0x00007ffff443545f in osgViewer::Renderer::cull_draw() () from 
/usr/lib/x86_64-linux-gnu/libosgViewer.so.100
#12 0x00007ffff55cfd49 in osg::GraphicsContext::runOperations() () from 
/usr/lib/x86_64-linux-gnu/libosg.so.100
#13 0x00007ffff446c6c4 in osgViewer::ViewerBase::renderingTraversals() () 
from /usr/lib/x86_64-linux-gnu/libosgViewer.so.100
#14 0x0000000000a7c73e in 
osgViewer::ViewerGtk::on_graphics_window_expose_event (widget=0x31134b0, 
event=0x7fffffffdf10, data=0x456ba50) at Main3D/osgGtk/ViewerGtk.cpp:220
#15 0x00007ffff78beaec in ?? () from 
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#16 0x00007ffff6904fa5 in g_closure_invoke () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007ffff6916fc1 in ?? () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#18 0x00007ffff691f7f9 in g_signal_emit_valist () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#19 0x00007ffff692008f in g_signal_emit () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#20 0x00007ffff79d693c in ?? () from 
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#21 0x00007ffff78bd7dd in gtk_main_do_event () from 
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#22 0x00007ffff7518b9f in ?? () from 
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#23 0x00007ffff7515671 in ?? () from 
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#24 0x00007ffff7515fa8 in gdk_window_process_all_updates () from 
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#25 0x00007ffff7842971 in ?? () from 
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#26 0x00007ffff74f4d57 in ?? () from 
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#27 0x00007ffff662e04a in g_main_context_dispatch () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007ffff662e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007ffff662e712 in g_main_loop_run () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007ffff78bc697 in gtk_main () from 
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#31 0x000000000130f9a6 in main (argc=1, argv=0x7fffffffe398) at 
Main/main.cpp:3889



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