# Schema
type Human {
  name: String!
}
type Query {
  human: Human
}

# Query
{
  human { ...fragA }
  __schema { types { ...cycle1 } }
}
fragment fragA on Human { name, ...fragB }
fragment fragB on Human { name, ...fragC }
fragment fragC on Human { name, ...fragA }

# Indirect cycle
fragment cycle1 on __Type { kind, ...cycle2 }

fragment cycle2 on __Type {
  kind
  ofType { ...cycle1 }
}