CompositeViewer - Segfault

[mungewell]

Previous version (ie. Oct 27) worked OK, now I am getting a segfault when running the Composite viewer. Other viewers function OK.

Seen below without Rift connected, I have a 'fake' rift and don't want that to confuse the issue.

simon@bigbox:/storage/osgoculusviewer-git$ git log | head
commit ceca3c16a5a9af739e7abd3eb5c0eddee286fe5e
Author: Björn Blissing <bjorn.blissing@vti.se>
Date:   Mon Nov 3 14:45:29 2014 +0100

    Xinerama is not a dependency for OVR since 0.4.x

commit 097852a9eb5a81a43b39437a7c402f4094d1d3d5
Merge: 1120932 0bd1158
Author: Björn Blissing <bjorn.blissing@vti.se>
Date:   Fri Oct 31 14:54:36 2014 +0100
simon@bigbox:/storage/osgoculusviewer-git$ gdb ./bin/OculusCompositeViewerExample 
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Reading symbols from ./bin/OculusCompositeViewerExample...done.
(gdb) r /storage/speed-dreams-git-svn/data/data/objects/wheel2.ac
Starting program: /storage/osgoculusviewer-git/bin/OculusCompositeViewerExample /storage/speed-dreams-git-svn/data/data/objects/wheel2.ac
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff7fcd700 (LWP 3316)]
Warning: No device could be found. Creating emulated device 
Product:         Oculus Rift DK1
Manufacturer:    Oculus VR
VendorId:        -1
ProductId:       -1
SerialNumber:    
FirmwareVersion: -1.-1
osgDB ac3d reader: could not find texture "wheel3d.png"
osgDB ac3d reader: could not find texture "wheel3d.png"

Program received signal SIGSEGV, Segmentation fault.
0x0000000000446db2 in osg::ref_ptr<osg::GraphicsContext::Traits>::get (this=0x40) at /usr/include/osg/ref_ptr:92
92          T* get() const { return _ptr; }
(gdb) bt
#0  0x0000000000446db2 in osg::ref_ptr<osg::GraphicsContext::Traits>::get (this=0x40) at /usr/include/osg/ref_ptr:92
#1  0x000000000044656a in osg::GraphicsContext::getTraits (this=0x0) at /usr/include/osg/GraphicsContext:286
#2  0x0000000000444397 in OculusDevice::createRTTCamera (this=0x73cd60, texture=0x745420, eye=OculusDevice::LEFT, 
    referenceFrame=osg::Transform::ABSOLUTE_RF, gc=0x0) at oculusdevice.cpp:469
#3  0x000000000043e177 in main (argc=2, argv=0x7fffffffdf88) at compositeviewerexample.cpp:45
(gdb)

[Factoid]

Line 469 in oculusdevice.cpp should read

GLenum buffer = gc && gc->getTraits()->doubleBuffer ? GL_BACK : GL_FRONT;

[mungewell]

Awesome. That works for me, Thanks.