Hi!
1st. I can confirm that in 3.1 this doesn’t works too.
2nd. It doesn’t understand single ‘int’ only single ‘integer’
3rd. I try to find the code which check for [] after ‘integer’, but I can’t it’s too abstract for me 
but it’s seems to me that something should make from integer[] many single integers and than call Type::Build() and it is not doing so.
ps. dlr, check spelling, you’ve got ‘greEter than’ in condition. If your config is hardcoded (free of user input) do you really need this bind?