error[E0391]: cycle detected when const-evaluating + checking `A` --> $DIR/issue-23302-3.rs:1:16 | LL | const A: i32 = B; | ^ | note: ...which requires const-evaluating + checking `B`... --> $DIR/issue-23302-3.rs:3:16 | LL | const B: i32 = A; | ^ = note: ...which again requires const-evaluating + checking `A`, completing the cycle note: cycle used when simplifying constant for the type system `A` --> $DIR/issue-23302-3.rs:1:1 | LL | const A: i32 = B; | ^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0391`.