error[E0391]: cycle detected when computing the super predicates of `B`
  --> $DIR/cycle-trait-supertrait-indirect.rs:7:1
   |
LL | trait B: C {
   | ^^^^^^^^^^
   |
note: ...which requires computing the super traits of `B`...
  --> $DIR/cycle-trait-supertrait-indirect.rs:7:10
   |
LL | trait B: C {
   |          ^
note: ...which requires computing the super predicates of `C`...
  --> $DIR/cycle-trait-supertrait-indirect.rs:11:1
   |
LL | trait C: B { }
   | ^^^^^^^^^^
note: ...which requires computing the super traits of `C`...
  --> $DIR/cycle-trait-supertrait-indirect.rs:11:10
   |
LL | trait C: B { }
   |          ^
   = note: ...which again requires computing the super predicates of `B`, completing the cycle
note: cycle used when computing the super traits of `A`
  --> $DIR/cycle-trait-supertrait-indirect.rs:4:10
   |
LL | trait A: B {
   |          ^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0391`.