DerelictGL3 glGenBuffers segmentation fault.

[Kevin]

Thanks. That help but know my buffers doesn't recognize opengl 
types.

I created mygl and import it to all files. Updated code on github.
source/buffers.d(6,12): Error: undefined identifier GLuint, did 
you mean alias GLuint64?
source/buffers.d(7,13): Error: undefined identifier GLsizei
and more.

Did I put "DerelictGL3_CustomFreeFuncs" in the right place ?
json file
     "name": "cube",
     "targetType": "executable",
     "mainSourceFile": "source/cube.d",
     "dependencies": {
     "derelict-sdl2": "~>3.0.0-beta",
     "derelict-gl3": "~>2.0.0-beta",
     "gl3n": "~>1.3.1",
     },
     "versions": [ "DerelictGL3_CustomFreeFuncs" ],