DerelictGL3 and glBegin() access violation.

[Kayomn via Digitalmars-d-learn]

Maybe I'm missing something, but whenever I attempt to call 
glBegin() with anything my program immediately encounters an 
access violation.

I've got a very simple setup, with this being my main:
import base.application;

import derelict.opengl3.gl3;
import derelict.glfw3.glfw3;

int main(string[] args) {
        DerelictGL3.load();

        version (Windows) {
                DerelictGLFW3.load(".\\dll\\glfw3.dll");
        } else {
                DerelictGLFW3.load();
        }
        return Application(args).run();
}

And I'm remembering to reload after creating the GL context in 
the window class:

public this(int width,int height,string title) {
        if (glfwInit()) {
                // Hint configuration.
                glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR,3);
                glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR,3);
                glfwWindowHint(GLFW_RESIZABLE,false);
                glfwWindowHint(GLFW_OPENGL_PROFILE,GLFW_OPENGL_CORE_PROFILE);

                this.nextTick = Time.getTicks();
                this.handle = glfwCreateWindow(
                        this.width = width,
                        this.height = height,
                        toStringz(this.title = title),
                        null,
                        null
                );

                if (this.handle is null) {
                        // Failure.
			Debug.log("GLFW Error: Failed to create window handle 
instance.");
                        glfwTerminate();
                } else {
                        import derelict.opengl3.gl3 : DerelictGL3;

                        // Set positon.
                        glfwSetWindowPos(this.handle,100,100);
                        glfwMakeContextCurrent(this.handle);
                        DerelictGL3.reload();
                }
        } else {
                Debug.log("GLFW Error: Failed to intialize.");
        }
}

Is this a DerelictGL3 bug? Am I missing something else that I 
should be initializing? Other things like glClear() seem to be 
working fine.