Android : Ligdx Android - GL Thread (suspended NullPointerException)

i'm using the LibGdx framework to create a game and I'm using Eclipse 4.4 (Luna). Whilst i'm debugging my application this method is breaking.

@Override
        public void run() {
            setName("GLThread " + getId());
            if (LOG_THREADS) {
                Log.i("GLThread", "starting tid=" + getId());
            }

            try {
                guardedRun();
            } catch (InterruptedException e) {
                // fall thru and exit normally
            } finally {
                sGLThreadManager.threadExiting(this);
            }
        }

inside the GLSurfaceView Android class, with the stack trace:

Thread [GLThread 232] (Suspended (exception NullPointerException))  
    GLSurfaceView$GLThread.run() line: 1243 

I know what a NullPointerException is, I know somewhere is passing a null value, but what I would like to know is how can I find out where?

With these types of questions, I can only assume you'll need more code but I don't know where I should be looking, I'll post code from the Java classes on request if anyone has an idea of where I should be looking.

Note: I'm not using GLSurfaceView directly anywhere in my code, I'm assuming it's a library from Libgdx. Unless it's something i'm missing?