2 files changed, 6 insertions, 2 deletions
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
index a04d1989d..9b7b0f5ae 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
@@ -63,7 +63,9 @@ public class X11ExternalGLXContext extends X11GLXContext {
     super(drawable, null);
     this.contextHandle = ctx;
     GLContextShareSet.contextCreated(this);
-    setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */); // use GL_VERSION
+    if( !setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+        throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+    }
     getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
index 42bb6b964..10f21f0c3 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
@@ -320,7 +320,9 @@ public class X11GLXContext extends GLContextImpl {
         if ( !glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
           throw new GLException(getThreadName()+": Error making temp context(0) current: display "+toHexString(display)+", context "+toHexString(contextHandle)+", drawable "+drawable);
         }
-        setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */); // use GL_VERSION
+        if( !setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+            throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+        }
         isDirect = GLX.glXIsDirect(display, contextHandle);
         if (DEBUG) {
             System.err.println(getThreadName() + ": createContextImpl: OK (old-1) share "+share+", direct "+isDirect+"/"+direct);