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<div>Hi,</div>
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<div>I have an application that takes a snapshot of the scene using setPostDrawCallback(capture), which gets the image and writes it to a file but on completion setting setPostDrawCallback(NULL) crashes on the next expose.</div>
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<pre>#4 0x00007f681bf08520 in <signal handler called> () at /lib/x86_64-linux-gnu/libc.so.6</pre>
<pre>#5 0x00007f681db87260 in osgUtil::RenderStage::draw(osg::RenderInfo&, osgUtil::RenderLeaf*&) () at /usr/local/lib/libosgUtil.so.161</pre>
<pre>#6 0x00007f681db92f2c in osgUtil::SceneView::draw() () at /usr/local/lib/libosgUtil.so.161</pre>
<pre>#7 0x00007f681d69b6b6 in osgViewer::Renderer::cull_draw() () at /usr/local/lib/libosgViewer.so.161</pre>
<pre>#8 0x00007f681edaa479 in osg::GraphicsContext::runOperations() () at /usr/local/lib/libosg.so.161</pre>
<pre>#9 0x00007f681d6d5bfd in osgViewer::ViewerBase::renderingTraversals() () at /usr/local/lib/libosgViewer.so.161</pre>
<pre>#10 0x00007f6835a03b37 in OSGGTKDrawingArea::_expose_event(_GtkGLArea*, _GdkGLContext*) (this=0x5575767c6450, area=0x557576c4c2e0, context=0x557576c50580) at osggtkdrawingarea.cpp:83</pre>
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<div>Even if I do nothing in the capture callback it still crashes.</div>
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<div>I've looked through the OSG examples but nothing sets the postdraw or finaldraw callbacks to NULL, both produce the same crash.</div>
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<div>This code has remained unchanged for 10 years but wasn't being used so the crash only came to light recently.</div>
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<div>I'm using OSG I built from source but I also tried it with libopenscenegraph161/jammy on Ubuntu and it still crashes - but strangely doesn't render an image but that's a problem for another day.</div>
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<pre>ldd ./qd3d/nyb/.libs/nyb-2108.1.1 | grep osg</pre>
<pre> libosg.so.161 => /usr/local/lib/libosg.so.161 (0x00007faab9200000)</pre>
<pre> libosgDB.so.161 => /usr/local/lib/libosgDB.so.161 (0x00007faab8e00000)</pre>
<pre> libosgGA.so.161 => /usr/local/lib/libosgGA.so.161 (0x00007faab8a00000)</pre>
<pre> libosgText.so.161 => /usr/local/lib/libosgText.so.161 (0x00007faab8600000)</pre>
<pre> libosgUtil.so.161 => /usr/local/lib/libosgUtil.so.161 (0x00007faab8000000)</pre>
<pre> libosgViewer.so.161 => /usr/local/lib/libosgViewer.so.161 (0x00007faab7c00000)</pre>
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<div>Any ideas?</div>
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<div>Cheers,</div>
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