OpenTK is a set of bindings to OpenGL, OpenCL and OpenAL. This is not the main repository, just a temporary import to allow Mono developers to make changes to this module. Please do not contribute changes here, contribute them to the upstream maintainers at http://www.opentk.com
From discussion at https://github.com/opentk/opentk/issues/535 I noticed this:
which would seem to cause a stack overflow
The other two classes with this DrawElements overload (here and here) both used new IntPtr(offset) instead.