I get status code of 400 error when I request nested resources with graphql.

Let me apologize for my poor English. 

This is queries I used.

https://gist.github.com/h-michael/96ad9a34d017ebd3b7d605b0e7e3b51d

Fisrt queries get 400 error. But second and third queries get 200.

I think that github api v4 can’t response too many nested resources, but this is not undocumented.