Derelict OpenGL basic program does not work but OpenGL does not say anything is wrong?

[Bennet via Digitalmars-d-learn]

I've begun writing some basic OpenGL code using DerelictGL3 but 
I've hit a wall. I've managed to open a window (with 
DerelictSDL2) and call basic OpenGL functions such as glClear(). 
Still I can not get a basic triangle up and running. glError() 
does not return anything and when compiling, linking, and 
validating the shaders I get no errors. My code is located at: 
https://github.com/BennetLeff/PhySim