Khronos public bugtracker – Bug 381
SHADER_TYPE can not hold TESSEL? Table list only vertex, geometry and fragment.
Last modified: 2013-05-28 09:09:15 PDT
If it can add tessel, if not state it explicitly!
Tables 7.1, 7.9 and 7.10 in OpenGL 4.3 core spec list all shader types (including tessellation and compute). I am not aware of any other tables listing shader types and am considering this bug fixed. Feel free to re-open if this is not the case, but please be more specific if you do.