From 168f26fc80ed72f53a73d2997776358a1a4a3b80 Mon Sep 17 00:00:00 2001
From: AnyOldName3 <krizdjali+gitlab@gmail.com>
Date: Sun, 4 Apr 2021 15:29:08 +0000
Subject: [PATCH] Fix crash on startup

---
 components/sceneutil/util.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/sceneutil/util.cpp b/components/sceneutil/util.cpp
index cc8a2f44b4..1fe3685726 100644
--- a/components/sceneutil/util.cpp
+++ b/components/sceneutil/util.cpp
@@ -266,7 +266,9 @@ bool attachAlphaToCoverageFriendlyFramebufferToCamera(osg::Camera* camera, osg::
 {
 #if OSG_VERSION_LESS_THAN(3, 6, 6)
     // hack fix for https://github.com/openscenegraph/OpenSceneGraph/issues/1028
-    osg::GLExtensions::Get(0, false)->glRenderbufferStorageMultisampleCoverageNV = nullptr;
+    osg::ref_ptr<osg::GLExtensions> extensions = osg::GLExtensions::Get(0, false);
+    if (extensions)
+        extensions->glRenderbufferStorageMultisampleCoverageNV = nullptr;
 #endif
     unsigned int samples = 0;
     unsigned int colourSamples = 0;