From abd05f0ed76cc1148ab3899142dee5cb61314e6d Mon Sep 17 00:00:00 2001
From: Nikita Tsukanov <keks9n@gmail.com>
Date: Wed, 23 Jan 2019 12:32:01 +0300
Subject: [PATCH] [X11] Abort GLX context creation if GL_VERSION is null

---
 src/Avalonia.X11/Glx/GlxDisplay.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Avalonia.X11/Glx/GlxDisplay.cs b/src/Avalonia.X11/Glx/GlxDisplay.cs
index a94f2ba625..7ca2136709 100644
--- a/src/Avalonia.X11/Glx/GlxDisplay.cs
+++ b/src/Avalonia.X11/Glx/GlxDisplay.cs
@@ -80,6 +80,8 @@ namespace Avalonia.X11.Glx
             ImmediateContext.MakeCurrent();
 
             GlInterface = GlInterface.FromNativeUtf8GetProcAddress(p => GlxGetProcAddress(p));
+            if (GlInterface.Version == null)
+                throw new OpenGlException("GL version string is null, aborting");
         }
         
         public void ClearContext() => GlxMakeCurrent(_x11.Display, IntPtr.Zero, IntPtr.Zero);