Comment 53 for bug 1553328

I believe this is now possible with ARB_direct_state_access. While I add support for this and add some asserts so that this doesn't happen in the future, would either of you mind retesting with

MESA_EXTENSION_OVERRIDE=-GL_ARB_direct_state_access

which should prevent those endpoints from appearing? I somewhat doubt that this is the b2g issue though, that seems to be using GLES2 which doesn't have anything like this.