error[E0391]: cycle detected when computing the super predicates 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:11:10 | LL | trait C: B { } | ^ = note: ...which again requires computing the super predicates of `B`, completing the cycle note: cycle used when computing the super predicates 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`.