Looks like there is a cut and paste error which means the meta save/restore code won't save the active program if it doesn't have a fragment shader. Please see the patch.
Created attachment 52487 [details] [review] meta: Fix saving the active program When saving the active program in _mesa_meta_begin, it was actually saving the fragment program instead. This means that if the application binds a program that only has a vertex shader then when the meta saved state is restored it will forget the bound program.
Thanks Neil. I've pushed the patch and am marking the bug as RESOLVED/FIXED.
bug/show.html.tmpl processed on Mar 20, 2017 at 09:48:18. (provided by the Example extension).