error[E0391]: cycle detected when checking if `A` is a trivial const
  --> $DIR/issue-23302-3.rs:1:1
   |
LL | const A: i32 = B;
   | ^^^^^^^^^^^^
   |
note: ...which requires building MIR for `A`...
  --> $DIR/issue-23302-3.rs:1:1
   |
LL | const A: i32 = B;
   | ^^^^^^^^^^^^
note: ...which requires checking if `B` is a trivial const...
  --> $DIR/issue-23302-3.rs:3:1
   |
LL | const B: i32 = A;
   | ^^^^^^^^^^^^
note: ...which requires building MIR for `B`...
  --> $DIR/issue-23302-3.rs:3:1
   |
LL | const B: i32 = A;
   | ^^^^^^^^^^^^
   = note: ...which again requires checking if `A` is a trivial const, 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;
   | ^^^^^^^^^^^^
   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information

error: aborting due to 1 previous error

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