Comment 2 for bug 1580118

Interestingly we have
    Q_ASSERT(mEglContext != EGL_NO_CONTEXT);
in the constructor of UbuntuOpenGLContext, and
    ./EGL/egl.h:98:#define EGL_NO_CONTEXT ((EGLContext)0)

but since it's a Q_ASSERT and not an ASSERT is not crashing there